CVE-2018-0491

Name: CVE-2018-0491
Creator: NVD / NIST
Published: 2018-03-05T15:29:00.27+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 15.59%

Last modified Jun 17, 2026

CVE-2018-0491 is a vulnerability of currently unknown severity. A use-after-free issue was discovered in Tor 0.3.2.x before 0.3.2.10. It allows remote attackers to cause a denial of service (relay crash) because the KIST implementation allows a channel to be added more than once in the pending list.. EPSS estimates a 15.59% chance of exploitation in the next 30 days.

Description

A use-after-free issue was discovered in Tor 0.3.2.x before 0.3.2.10. It allows remote attackers to cause a denial of service (relay crash) because the KIST implementation allows a channel to be added more than once in the pending list.

Metrics

EPSS Probability

15.59%

96.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Torproject	Tor	>= 0.3.2.0, < 0.3.2.10

References

https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915Vendor Advisory
https://trac.torproject.org/projects/tor/ticket/24700Issue Tracking, Mitigation, Vendor Advisory
https://trac.torproject.org/projects/tor/ticket/25117Issue Tracking, Patch, Vendor Advisory
https://www.exploit-db.com/exploits/44994/Exploit, Third Party Advisory, VDB Entry
https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915Vendor Advisory
https://trac.torproject.org/projects/tor/ticket/24700Issue Tracking, Mitigation, Vendor Advisory
https://trac.torproject.org/projects/tor/ticket/25117Issue Tracking, Patch, Vendor Advisory
https://www.exploit-db.com/exploits/44994/Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Mar 5, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-0491?

How severe is CVE-2018-0491?

Severity scoring for CVE-2018-0491 is pending analysis. The EPSS model estimates a 15.59% probability of exploitation in the next 30 days.

How do I fix CVE-2018-0491?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-0491?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST