SB2019112917 - Input validation error in GNU GnuPG
Published: November 29, 2019 Updated: August 4, 2020
Security Bulletin ID
SB2019112917
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2015-0837)
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The mpi_powm function in Libgcrypt before 1.6.3 and GnuPG before 1.4.19 allows attackers to obtain sensitive information by leveraging timing differences when accessing a pre-computed table during modular exponentiation, related to a "Last-Level Cache Side-Channel Attack."
Remediation
Install update from vendor's website.