#ssl

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Aug. 26 and Sept. 2. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics, indicators of compromise, and discussing how our customers are automatically protected from these threats. As a reminder, the information provided for the following threats in this post is non-exhaustive and current as of the date of publication. Additionally, please keep in mind that IOC searching is only one part of threat hunting. Spotting a single IOC does not necessarily indicate maliciousness. Detection and coverage for the following threats is subject to updates, pending additional threat or vulnerability analysis. For the most current information, please refer to your Firepower Management Center, Snort.org, or ClamAV.net. For each threat described below, this blog post only lists 2...

Ubuntu Security Notice 5593-1 - It was discovered that Zstandard incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code.

Ubuntu Security Notice 5587-1 - Axel Chong discovered that when curl accepted and sent back cookies containing control bytes that a HTTP server might return a 400 response. A malicious cookie host could possibly use this to cause denial-of-service.

wolfSSL through 5.0.0 allows an attacker to cause a denial of service and infinite loop in the client component by sending crafted traffic from a Machine-in-the-Middle (MITM) position. The root cause is that the client module accepts TLS messages that normally are only sent to TLS servers.

In Samba, GnuTLS gnutls_rnd() can fail and give predictable random values.

An Improper Certificate Validation attack was found in Openshift. A re-encrypt Route with destinationCACertificate explicitly set to the default serviceCA skips internal Service TLS certificate validation. This flaw allows an attacker to exploit an invalid certificate, resulting in a loss of confidentiality.

An Improper Certificate Validation attack was found in Openshift. A re-encrypt Route with destinationCACertificate explicitly set to the default serviceCA skips internal Service TLS certificate validation. This flaw allows an attacker to exploit an invalid certificate, resulting in a loss of confidentiality.

A flaw was found in the python-scciclient when making an HTTPS connection to a server where the server's certificate would not be verified. This issue opens up the connection to possible Man-in-the-middle (MITM) attacks.

Red Hat Security Advisory 2022-6152-01 - Secondary Scheduler Operator for Red Hat OpenShift 1.1.0.

Red Hat Security Advisory 2022-6290-01 - OpenShift API for Data Protection enables you to back up and restore application resources, persistent volume data, and internal container images to external backup storage. Issues addressed include a denial of service vulnerability.