Vulnerability · Published Jul 12, 2021 · Assigned by mitre
CVE-2021-36377
High 7.5
In plain English
A high-severity security flaw in the fossil package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)0.6%top 52.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Fossil before 2.14.2 and 2.15.x before 2.15.2 often skips the hostname check during TLS certificate validation.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | fossil | 1:2.15.2-1 | DEBIAN-CVE-2021-36377 |
| Debian:13 | fossil | 1:2.15.2-1 | DEBIAN-CVE-2021-36377 |
| Debian:14 | fossil | 1:2.15.2-1 | DEBIAN-CVE-2021-36377 |
| Ubuntu:22.04:LTS | fossil | no fix listed | UBUNTU-CVE-2021-36377 |
| Ubuntu:24.04:LTS | fossil | no fix listed | UBUNTU-CVE-2021-36377 |
| Ubuntu:25.10 | fossil | no fix listed | UBUNTU-CVE-2021-36377 |
| Ubuntu:26.04:LTS | fossil | no fix listed | UBUNTU-CVE-2021-36377 |
| Ubuntu:26.10 | fossil | no fix listed | UBUNTU-CVE-2021-36377 |
Affected products (as reported)
References
- https://fossil-scm.org/forum/forumpost/8d367e16f53d93c789d70bd3bf2c9587227bbd5c6a7b8e512cccd79007536036 x_refsource_MISC
- FEDORA-2021-8523af7a88 vendor-advisory, x_refsource_FEDORA