Use After Free Affecting tor package, versions <0.3.2.10-1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1804-TOR-370841
- published5 Mar 2018
- disclosed5 Mar 2018
Introduced: 5 Mar 2018
CVE-2018-0491 (opens in a new tab)How to fix?
Upgrade Ubuntu:18.04 tor to version 0.3.2.10-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream tor package and not the tor package as distributed by Ubuntu.
See How to fix? for Ubuntu:18.04 relevant fixed versions and status.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-0491
- https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915
- https://trac.torproject.org/projects/tor/ticket/24700
- https://trac.torproject.org/projects/tor/ticket/25117
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0491
- https://security-tracker.debian.org/tracker/CVE-2018-0491
- https://www.exploit-db.com/exploits/44994/
- https://www.exploit-db.com/exploits/44994