SB2015033111 - Fedora EPEL 7 update for tor

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2015033111

SB2015033111 - Fedora EPEL 7 update for tor

Published: March 31, 2015 Updated: April 24, 2025

Security Bulletin ID SB2015033111
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
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 2 secuirty vulnerabilities.


1) Improper Handling of Exceptional Conditions (CVE-ID: CVE-2015-2688)

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

buf_pullup in Tor before 0.2.4.26 and 0.2.5.x before 0.2.5.11 does not properly handle unexpected arrival times of buffers with invalid layouts, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via crafted packets.


2) Input validation error (CVE-ID: CVE-2015-2689)

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

Tor before 0.2.4.26 and 0.2.5.x before 0.2.5.11 does not properly handle pending-connection resolve states during periods of high DNS load, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via crafted packets.


Remediation

Install update from vendor's website.

References