Improper input validation in The Tor Project
CVE-2015-2689
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.022 (81.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000
Affected products
- The Tor Project — versions before 0.2.4.26, 0.2.5.x before 0.2.5.11
- Torproject Tor
Weakness classification (CWE)
References
- lists.torproject.org/pipermail/tor-talk/2015-March/037281.html (Mailing List, Vendor Advisory)
- trac.torproject.org/projects/tor/ticket/14129 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2015-2689?
- CVE-2015-2689 is a high-severity vulnerability in The Tor Project, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2020-01-24.
- How severe is CVE-2015-2689?
- High severity. CVSS v3 base score is 7.5 out of 10.