SB2015030603 - Fedora 22 update for libgcrypt 

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Main Vulnerability Database SB2015030603

SB2015030603 - Fedora 22 update for libgcrypt

Published: March 6, 2015 Updated: April 24, 2025

Security Bulletin ID SB2015030603
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

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

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Information disclosure (CVE-ID: CVE-2014-3591)

The vulnerability allows a local non-authenticated attacker to gain access to sensitive information.

Libgcrypt before 1.6.3 and GnuPG before 1.4.19 does not implement ciphertext blinding for Elgamal decryption, which allows physically proximate attackers to obtain the server's private key by determining factors using crafted ciphertext and the fluctuations in the electromagnetic field during multiplication.


2) 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.

References