SB2021011906 - Denial of service in GNU C Library

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Main Vulnerability Database SB2021011906

SB2021011906 - Denial of service in GNU C Library

Published: January 19, 2021

Security Bulletin ID SB2021011906
CSH Severity
Medium
Patch available
NO
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Reachable Assertion (CVE-ID: CVE-2020-29562)

CWE-ID: CWE-617 - Reachable Assertion

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


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

The vulnerability exists due to a reachable assertion when converting UCS4 text containing an irreversible character in the iconv function in the GNU C Library (aka glibc or libc6). A remote attacker can pass specially crafted data to the library, trigger an assertion failure and preform a denial of service attack.


Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References