SB2021042942 - Multiple vulnerabilities in GNU Binutils

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2021042942

SB2021042942 - Multiple vulnerabilities in GNU Binutils

Published: April 29, 2021 Updated: January 22, 2023

Security Bulletin ID SB2021042942
Severity
High
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

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

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Heap-based buffer overflow (CVE-ID: CVE-2021-20284)

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

The vulnerability exists due to a boundary error within the _bfd_elf_slurp_secondary_reloc_section() function in elf.c. A remote attacker can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


2) UNIX symbolic link following (CVE-ID: CVE-2021-20197)

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

The vulnerability exists due to a symlink following issue within the ar, objcopy, strip, ranlib utilities wen writing output. A local user can create a specially crafted symbolic link to a critical file on the system and overwrite it with privileges of the application.

Successful exploitation of this vulnerability may result in privilege escalation.


3) Out-of-bounds write (CVE-ID: CVE-2021-20294)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in readelf. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.


Remediation

Install update from vendor's website.

References