CVE-2017-8820 is a denial-of-service vulnerability affecting multiple versions of Tor, including those before 0.2.5.16, 0.2.8.17, 0.2.9.14, 0.3.0.13, and 0.3.1.9, as well as Debian Linux distributions running Tor. This vulnerability allows remote attackers to trigger a NULL pointer dereference and application crash on Tor directory authorities by sending a specially crafted malformed descriptor. Rated with a CVSS score of 7.5 (High), it has a network attack vector, low attack complexity, and a high impact on availability, with no impact on confidentiality or integrity. There is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.2.5.16CPE matchmatch criteria | cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:* | ||
>= 0.2.6, < 0.2.8.17CPE matchmatch criteria | cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:* | ||
>= 0.2.9, < 0.2.9.14CPE matchmatch criteria | cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:* | ||
>= 0.3.0, < 0.3.0.13CPE matchmatch criteria | cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:* | ||
>= 0.3.1, < 0.3.1.9CPE matchmatch criteria | cpe:2.3:a:tor_project:tor:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.