CVE-2018-0491 is a use-after-free vulnerability affecting Tor versions 0.3.2.x before 0.3.2.10. This flaw allows remote attackers to trigger a denial of service by causing a relay crash due to a weakness in the KIST implementation that permits a channel to be added multiple times to the pending list. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low complexity, leading to high availability impact. While not listed in CISA's KEV catalog, a proof-of-concept exploit is publicly available on ExploitDB, though there is no evidence of active exploitation, Metasploit modules, or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 0.3.2.0, < 0.3.2.10CPE matchmatch criteria | cpe:2.3:a:torproject: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.