SB2021110428 - Fedora 35 update for kernel

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Main Vulnerability Database SB2021110428

SB2021110428 - Fedora 35 update for kernel

Published: November 4, 2021

Security Bulletin ID SB2021110428
Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 67% Low 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Buffer overflow (CVE-ID: CVE-2021-43267)

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input in net/tipc/crypto.c in the Linux kernel. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.

A remote attacker can send specially crafted MSG_CRYPTO messages to the affected system, trigger memory corruption and execute arbitrary code on the system.


2) Insufficient verification of data authenticity (CVE-ID: CVE-2021-3772)

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

The vulnerability exists due to insufficient verification of data authenticity in the Linux SCTP stack. A remote attacker can exploit this vulnerability to perform a denial of service attack.

3) Out-of-bounds write (CVE-ID: CVE-2021-42327)

The vulnerability allows a local privileged user to execute arbitrary code.

The vulnerability exists due to out-of-bounds write error. A local privileged user can execute arbitrary code.


Remediation

Install update from vendor's website.

References