SB2019022804 - Denial of service in GNU C Library (glibc)

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Main Vulnerability Database SB2019022804

SB2019022804 - Denial of service in GNU C Library (glibc)

Published: February 28, 2019 Updated: April 7, 2020

Security Bulletin ID SB2019022804
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Stack-based buffer overflow (CVE-ID: CVE-2018-20796)

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

The vulnerability exists due to boundary error in check_dst_limits_calc_pos_1() function in posix/regexec.c. A local user can pass specially crafted arguments to the application, trigger stack overflow and perform denial of service attack.


2) Out-of-bounds read (CVE-ID: CVE-2019-9169)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack or gain access to sensitive information.

The vulnerability exists due to heap-based buffer over-read via an attempted case-insensitive regular-expression match. A remote attacker can perform a denial of service attack or gain access to sensitive information.


Remediation

Install update from vendor's website.

References