CVE-2015-2689: Input Validation
First published: Fri Jan 24 2020(Updated: )
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.
Credit: security@debian.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Torproject Tor | <0.2.4.26 | |
| Torproject Tor | >=0.2.5.1<0.2.5.11 |
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Reference Links
Frequently Asked Questions
What is CVE-2015-2689?
CVE-2015-2689 is a vulnerability in Tor before 0.2.4.26 and 0.2.5.x before 0.2.5.11 that allows remote attackers to cause a denial of service (assertion failure and daemon exit) via crafted packets.
How does CVE-2015-2689 impact Tor?
CVE-2015-2689 can cause a denial of service by triggering an assertion failure and causing the Tor daemon to exit.
What is the severity of CVE-2015-2689?
CVE-2015-2689 has a severity rating of 7.5 (high) according to the Common Vulnerability Scoring System (CVSS).
What is the affected software version of CVE-2015-2689?
CVE-2015-2689 affects Tor versions before 0.2.4.26 and 0.2.5.x before 0.2.5.11.
How can I fix CVE-2015-2689?
To fix CVE-2015-2689, users should update their Tor software to version 0.2.4.26 or 0.2.5.11 (or a later version) which includes a patch for the vulnerability.
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