SB2024020203 - Gentoo update for glibc

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Memory leak (CVE-ID: CVE-2023-5156)

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak caused by an incorrect fix for #VU81447 (CVE-2023-4806). A remote attacker can force the application to leak memory and perform denial of service attack.

2) Heap-based buffer overflow (CVE-ID: CVE-2023-6246)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the __vsyslog_internal() function, which is called by both syslog() and vsyslog() while printing the SYSLOG_HEADER containing a long program name. A local user can pass a specially crafted input as arguments to the affected application, trigger a heap-based buffer overflow and execute arbitrary code on the system.

3) Off-by-one (CVE-ID: CVE-2023-6779)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to an off-by-one error within the __vsyslog_internal() function. A local user can trigger memory corruption and execute arbitrary code with elevated privileges.

4) Integer overflow (CVE-ID: CVE-2023-6780)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow within the __vsyslog_internal() function. A local user can pass specially crafted input to the affected application, trigger an integer overflow and execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://security.gentoo.org/glsa/202402-01