#ssl

Your fortnightly rundown of AppSec vulnerabilities, new hacking techniques, and other cybersecurity news

GnuTLS is a secure communications library implementing the SSL and TLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols, as well as APIs to parse and write X.509, PKCS #12, OpenPGP, and other required structures. It is intended to be portable and efficient with a focus on security and interoperability.

Red Hat Security Advisory 2023-0634-01 - Logging Subsystem 5.6.1 - Red Hat OpenShift. Issues addressed include a denial of service vulnerability.

A null pointer in OpenSSL can be dereferenced when signatures are being verified in malformed PKCS7 data. Agents or clients compiled with OpenSSL may experience unexpected crashes. OpenSSL has been removed in bottlerocket/update-operator version 1.1.0 in favor of Rust-based TLS using rustls.

A timing based side channel exists in the OpenSSL RSA decryption implementation which could enable a recovery of plaintext from across the network. This affects all RSA padding modes. A server agent compiled with OpenSSL could be made to give up plaintext payloads over the network, but this would require a large amount of malicious payloads from a third party actor as trial messages. OpenSSL removed in bottlerocket version 1.1.0 in favor of Rust-based TLS using rustls.

A double-free vulnerability exists in OpenSSL where it is possible to construct a malicious PEM file that has 0 bytes of payload data. This then points to data that has already been freed in memory which, when freed again, leads to a crash. Agents or clients compiled with OpenSSL may crash unexpectedly when parsing these PEM files. OpenSSL has been removed in bottlerocket/update-operator version 1.1.0 in favor of Rust-based TLS using rustls.

A read buffer overflow can be triggered in OpenSSL X.509 verification during name constraint checking. Note that this occurs after the certificate chain has been verified and would require a compromised CA. This can cause a client or agent compiled with OpenSSL to crash unexpectedly. OpenSSL has been removed in bottlerocket/update-operator version 1.1.0 in favor of Rust-based TLS using rustls.

An OpenSSL public API provides streaming of ASN.1 data via a BIO. It is possible for a malicious third party to use the BIO to access unfreed memory pointers that are not cleaned up after execution of the API. Freeing these memory pointers will result in a crash. Agents and clients compiled with OpenSSL may see unexpected crashes. OpenSSL has been removed in bottlerocket/update-operator version 1.1.0 in favor of Rust-based TLS using rustls.

This Metasploit module exploits an unauthenticated remote code execution vulnerability that affects Zoho ManageEngine Endpoint Central and MSP versions 10.1.2228.10 and below (CVE-2022-47966). Due to a dependency to an outdated library (Apache Santuario version 1.4.1), it is possible to execute arbitrary code by providing a crafted samlResponse XML to the Endpoint Central SAML endpoint. Note that the target is only vulnerable if it is configured with SAML-based SSO, and the service should be active.

This Metasploit module exploits an object deserialization vulnerability in Fortra GoAnywhere MFT.