CVE-2015-2689

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.65%
Vendor Advisory torproject.org Vendor Advisory torproject.org
Affected: The Tor Project Tor
Published at:
Updated at:

References

Link Tags
https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html mailing list vendor advisory
https://trac.torproject.org/projects/tor/ticket/14129 patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2015-2689?
CVE-2015-2689 has been scored as a high severity vulnerability.
How to fix CVE-2015-2689?
To fix CVE-2015-2689, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-2689 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-2689 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2015-2689?
CVE-2015-2689 affects The Tor Project Tor.
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