Use After Free in Torproject Tor
CVE-2018-0491
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.148 (96.6th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.148 · newest: 0.148 · change: 0.000
Affected products
- Torproject Tor
- Tor — versions Tor
Weakness classification (CWE)
References
- trac.torproject.org/projects/tor/ticket/24700 (Mitigation, Issue Tracking, Vendor Advisory)
- trac.torproject.org/projects/tor/ticket/25117 (Patch, Issue Tracking, Vendor Advisory)
- blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-0… (Vendor Advisory)
- www.exploit-db.com/exploits/44994/ (Exploit, VDB Entry, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2018-0491?
- CVE-2018-0491 is a high-severity vulnerability in Torproject Tor, classified under Use After Free. CVSS score: 7.5/10. Published 2018-03-05.
- How severe is CVE-2018-0491?
- High severity. CVSS v3 base score is 7.5 out of 10.