Vulnerability · Published Dec 28, 2020 · Assigned by mitre
CVE-2020-35766
High 7.8
In plain English
A high-severity security flaw in the opendkim package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).
Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.5%top 55.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
The test suite in libopendkim in OpenDKIM through 2.10.3 allows local users to gain privileges via a symlink attack against the /tmp/testkeys file (related to t-testdata.h, t-setup.c, and t-cleanup.c). NOTE: this is applicable to persons who choose to engage in the "A number of self-test programs are included here for unit-testing the library" situation.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | opendkim | no fix listed | DEBIAN-CVE-2020-35766 |
| Debian:13 | opendkim | no fix listed | DEBIAN-CVE-2020-35766 |
| Debian:14 | opendkim | no fix listed | DEBIAN-CVE-2020-35766 |
| Ubuntu:22.04:LTS | opendkim | no fix listed | UBUNTU-CVE-2020-35766 |
| Ubuntu:24.04:LTS | opendkim | no fix listed | UBUNTU-CVE-2020-35766 |
| Ubuntu:25.10 | opendkim | no fix listed | UBUNTU-CVE-2020-35766 |
| Ubuntu:26.04:LTS | opendkim | no fix listed | UBUNTU-CVE-2020-35766 |
| Ubuntu:26.10 | opendkim | no fix listed | UBUNTU-CVE-2020-35766 |
Affected products (as reported)
References
- https://github.com/trusteddomainproject/OpenDKIM/issues/113 x_refsource_MISC