SB2019112026 - Multiple vulnerabilities in GNU GnuPG

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2019112026

SB2019112026 - Multiple vulnerabilities in GNU GnuPG

Published: November 20, 2019 Updated: July 17, 2020

Security Bulletin ID SB2019112026
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

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

Description

This security bulletin contains information about 2 vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2015-1606)

CWE-ID: CWE-416 - Use After Free

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


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing a crafted keyring file. A remote attackers can cause a denial of service (invalid read and use-after-free).

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.


2) Input validation error (CVE-ID: CVE-2015-1607)

CWE-ID: CWE-20 - Improper input validation

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


The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.

kbx/keybox-search.c in GnuPG before 1.4.19, 2.0.x before 2.0.27, and 2.1.x before 2.1.2 does not properly handle bitwise left-shifts, which allows remote attackers to cause a denial of service (invalid read operation) via a crafted keyring file, related to sign extensions and "memcpy with overlapping ranges."


Remediation

Install update from vendor's website.

References