SB2024080831 - Multiple vulnerabilities in FreeBSD

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Main Vulnerability Database SB2024080831

SB2024080831 - Multiple vulnerabilities in FreeBSD

Published: August 8, 2024

Security Bulletin ID SB2024080831
CSH Severity
Critical
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Critical 25% Medium 25% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Race condition (CVE-ID: CVE-2024-7589)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Red


The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to a race condition when calling a not async-signal-safe in openssh. A remote non-authenticated attacker can send specially crafted packets to the system, trigger a race condition and execute arbitrary code as root.


2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2024-6760)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a logic error in the ktrace unility, which failed to detach when executing a setuid binary. A local user can gain access to sensitive information.


3) State Issues (CVE-ID: CVE-2024-6640)

CWE-ID: CWE-371 - State Issues

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to bypass pf rules.

The vulnerability exists due to improper handling of ICMPv6 packets with ID=0. If the firewall is configured to block incoming Echo requests, this rule can be bypass by sending an ICMPv6 packet with identifier value of zero.


4) Path traversal (CVE-ID: CVE-2024-6759)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing file names with path separator character (e.g. "/"). A remote user can trick the application to read or write data outside of the NFS mount.


Remediation

Install update from vendor's website.

References