SB2024120207 - Red Hat Enterprise Linux 9 update for libreswan

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Main Vulnerability Database SB2024120207

SB2024120207 - Red Hat Enterprise Linux 9 update for libreswan

Published: December 2, 2024

Security Bulletin ID SB2024120207
Severity
Medium
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 80% Low 20%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 secuirty vulnerabilities.


1) Reachable Assertion (CVE-ID: CVE-2023-23009)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion. A remote attacker can pass a specially crafted IKEv2 TS payload with an incorrect selector length and perform a denial of service (DoS) attack.


2) NULL pointer dereference (CVE-ID: CVE-2023-38711)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when processing IKEv1 Quick Mode packets. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.


3) Reachable Assertion (CVE-ID: CVE-2023-38710)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when processing IKEv2 REKEY packets. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.


4) Input validation error (CVE-ID: CVE-2023-38712)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing IKEv1 ISAKMP SA packets. A remote attacker can send specially crafted input to the system and perform a denial of service (DoS) attack.


5) Error Handling (CVE-ID: CVE-2024-2357)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect handling of a missing PreSharedKey when  a connection is configured to use reSharedKeys (authby=secret) and the connection cannot find a matching configured secret. When such a connection is automatically added on startup sing the auto= keyword, it can cause repeated crashes leading to a denial of service.

Remediation

Install update from vendor's website.

References