CVE-2018-12476 obs-service-extract_file's outfilename parameter allows to write files outside of package directory
Remote attackers with repository control can overwrite local files via path traversal in obs-service-tar_scm, requiring an upgrade to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2018-12476?
CVE-2018-12476 is a medium-severity path traversal vulnerability in SUSE Factory, published on 27 Jan 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Relative Path Traversal vulnerability in obs-service-tar_scm of SUSE Linux Enterprise Server 15; openSUSE Factory allows remote attackers with control over a repository to overwrite files on the machine of the local user if a malicious service is executed. This issue affects: SUSE Linux Enterprise Server 15 obs-service-tar_scm versions prior to 0.9.2.1537788075.fefaa74:. openSUSE Factory obs-service-tar_scm versions prior to 0.9.2.1537788075.fefaa74.
Which versions are affected by CVE-2018-12476?
It affects 1 product.
Products include Suse Obs-Service-Tar Scm.
How do I fix CVE-2018-12476?
Upgrade to a fixed version.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2018-12476 being exploited?
There is no known exploitation of CVE-2018-12476 in the wild and no public exploit code.
Sources
Also known as GHSA-7vq9-fwhq-w55p.