#ssh

This is the second installment of the Azure Serial Console blog, which provides insights to improve defenders’ preparedness when investigating Azure Serial Console activity on Azure Linux virtual machines. While the first blog post discussed various tracing activities, such as using Azure activity and Sysmon logs on Windows virtual machines to trace serial console activity, this blog outlines how to enable logging for Azure Linux virtual machines using Sysmon for Linux to capture and how to send these events to a log analytics workspace.

### Summary Russh v0.40.1 and earlier is vulnerable to a novel prefix truncation attack (a.k.a. Terrapin attack), which allows a man-in-the-middle attacker to strip an arbitrary number of messages right after the initial key exchange, breaking SSH extension negotiation (RFC8308) in the process and thus downgrading connection security. ### Mitigations To mitigate this protocol vulnerability, OpenSSH suggested a so-called "strict kex" which alters the SSH handshake to ensure a Man-in-the-Middle attacker cannot introduce unauthenticated messages as well as convey sequence number manipulation across handshakes. Support for strict key exchange has been added to Russh in the patched version. **Warning: To take effect, both the client and server must support this countermeasure.** As a stop-gap measure, peers may also (temporarily) disable the affected algorithms and use unaffected alternatives like AES-GCM instead until patches are available. ### Details The SSH specifications of Ch...

### Summary AsyncSSH v2.14.1 and earlier is vulnerable to a novel prefix truncation attack (a.k.a. Terrapin attack), which allows a man-in-the-middle attacker to strip an arbitrary number of messages right after the initial key exchange, breaking SSH extension negotiation (RFC8308) in the process and thus downgrading connection security. ### Mitigations To mitigate this protocol vulnerability, OpenSSH suggested a so-called "strict kex" which alters the SSH handshake to ensure a Man-in-the-Middle attacker cannot introduce unauthenticated messages as well as convey sequence number manipulation across handshakes. Support for strict key exchange has been added to AsyncSSH in the patched version. **Warning: To take effect, both the client and server must support this countermeasure.** As a stop-gap measure, peers may also (temporarily) disable the affected algorithms and use unaffected alternatives like AES-GCM instead until patches are available. ### Details The SSH specifications...

By Waqas Polish authorities and FortiGuard Labs have issued a warning to customers about a new wave of cyberattacks associated with TeamCity. This is a post from HackRead.com Read the original post: Russian APT29 Hacked US Biomedical Giant in TeamCity-Linked Breach

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global). View CSAF 1. EXECUTIVE SUMMARY CVSS v3 9.8 ATTENTION: Exploitable remotely/low attack complexity Vendor: Siemens Equipment: SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1 Vulnerabilities: Improper Restriction of XML External Entity Reference, Time-of-check Time-of-use (TOCTOU) Race Condition, Command Injection, Missing Encryption of Sensitive Data, Cross-site Scripting, Improper Restriction of Operations within the Bounds of a Memory Buffer, Use After Free, Improper Input Validation, Out-of-bounds Write, Out-of-bounds Read, Infinite Loop, Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'), Allocation of Resources Without Limits or ...

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global). View CSAF 1. EXECUTIVE SUMMARY CVSS v3 8.1 ATTENTION: Exploitable remotely/low attack complexity Vendor: Siemens Equipment: SINEC INS Vulnerabilities: Improper Certificate Validation, Improper Input Validation, Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), Unexpected Status Code or Return Value, Missing Report of Error Condition, Improper Check for Unusual or Exceptional Conditions 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to create a denial-of-service condition, intercept credentials, or escalate privileges on the affected device. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The foll...

Ubuntu Security Notice 6554-1 - Zygmunt Krynicki discovered that GNOME Settings did not accurately reflect the SSH remote login status when the system was configured to use systemd socket activation for OpenSSH. Remote SSH access may be unknowingly enabled, contrary to expectation.

Atos Unify OpenScape Session Border Controller (SBC) versions before V10 R3.4.0, Branch versions before V10 R3.4.0, and BCF versions before V10 R10.12.00 and V10 R11.05.02 suffer from an argument injection vulnerability that can lead to unauthenticated remote code execution and authentication bypass.

The vmwgfx driver contains a local privilege escalation vulnerability that allows unprivileged users to gain access to files opened by other processes on the system through a dangling 'file' pointer.

An issue was discovered in EnterpriseDB Postgres Advanced Server (EPAS) before 11.21.32, 12.x before 12.16.20, 13.x before 13.12.16, 14.x before 14.9.0, and 15.x before 15.4.0. It allows an authenticated user to to obtain information about whether certain files exist on disk, what errors if any occur when attempting to read them, and some limited information about their contents (regardless of permissions). This can occur when a superuser has configured one or more directories for filesystem access via CREATE DIRECTORY and adopted certain non-default settings for log_line_prefix and log_connections.