CVE-2020-35766 Path traversal in n/a
Local attackers can escalate privileges via symlink attacks on temporary test files when running OpenDKIM self-tests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-35766?
CVE-2020-35766 is a high-severity path traversal vulnerability in n/a, published on 28 Dec 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-59
Which versions are affected by CVE-2020-35766?
It affects 1 product.
Products include Opendkim Opendkim.
How do I fix CVE-2020-35766?
No fix has been published for CVE-2020-35766 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2020-35766 being exploited?
There is no known exploitation of CVE-2020-35766 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2020-35766, GHSA-q8qf-8pcx-vfw7, UBUNTU-CVE-2020-35766.