SB2021041530 - Ubuntu update for linux

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Main Vulnerability Database SB2021041530

SB2021041530 - Ubuntu update for linux

Published: April 15, 2021

Security Bulletin ID SB2021041530
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Incorrect authorization (CVE-ID: CVE-2021-3493)

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to incorrect authorization error within the validheader() and cap_convert_nscap() functions in security/commoncap.c, within the vfs_setxattr() and setxattr() functions in fs/xattr.c. A local user can execute arbitrary code.


2) Command Injection (CVE-ID: CVE-2021-29154)

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

The vulnerability exists due to incorrect computation of branch displacements within the BPF JIT compilers in the Linux kernel in arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c. A local user can inject and execute arbitrary commands with elevated privileges.


Remediation

Install update from vendor's website.

References