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USN-6139-1: Python vulnerability Yebo Cao discovered that Python incorrectly handled certain URLs. An attacker could use this issue to bypass blockinglisting methods. This issue was first addressed in USN-5960-1, but was incomplete. Here we address an additional fix to that issue. (CVE-2023-24329) Source: USN-6139-1: Python vulnerability

USN-6138-1: libssh vulnerabilities Philip Turnbull discovered that libssh incorrectly handled rekeying with algorithm guessing. A remote attacker could use this issue to cause libssh to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2023-1667) Kevin Backhouse discovered that libssh incorrectly handled verifying data signatures. A remote attacker could possibly use this issue to bypass authorization. (CVE-2023-2283) Source: USN-6138-1: libssh vulnerabilities

USN-6137-1: LibRaw vulnerabilities It was discovered that LibRaw incorrectly handled photo files. If a user or automated system were tricked into processing a specially crafted photo file, a remote attacker could cause applications linked against LibRaw to crash, resulting in a denial of service, or possibly execute arbitrary code. Source: USN-6137-1: LibRaw vulnerabilities

USN-6136-1: FRR vulnerabilities It was discovered that FRR incorrectly handled parsing certain BGP messages. A remote attacker could possibly use this issue to cause FRR to crash, resulting in a denial of service. This issue only affected Ubuntu 23.04. (CVE-2023-31489) It was discovered that FRR incorrectly handled parsing certain BGP messages. A remote attacker could possibly use this issue to cause FRR to crash, resulting in a denial of service. (CVE-2023-31490) Source: USN-6136-1: FRR vulnerabilities