CVE-2017-8823 describes a use-after-free vulnerability in Tor's onion service v2, specifically during intro-point expiration due to mismanagement of the expiring list in certain error cases. This flaw affects various versions of Tor before 0.2.5.16, 0.2.8.17, 0.2.9.14, 0.3.0.13, and 0.3.1.9, impacting Debian and Tor Project distributions. The vulnerability carries a high severity CVSS score of 8.1, indicating a critical risk. It is a network-exploitable vulnerability with high impact on confidentiality, integrity, and availability, but requires high attack complexity. There is no evidence of active exploitation, nor are there publicly available exploit codes in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, suggesting low public awareness and attention.
| 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:H/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 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.