Directory Traversal Affecting rubygems package, versions <3.2.0~rc.1-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-RUBYGEMS-1558867
- published27 Mar 2019
- disclosed6 Jun 2019
Introduced: 27 Mar 2019
CVE-2019-8320 (opens in a new tab)How to fix?
Upgrade Debian:12 rubygems to version 3.2.0~rc.1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rubygems package and not the rubygems package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Before making new directories or touching files (which now include path-checking code for symlinks), it would delete the target destination. If that destination was hidden behind a symlink, a malicious gem could delete arbitrary files on the user's machine, presuming the attacker could guess at paths. Given how frequently gem is run as sudo, and how predictable paths are on modern systems (/tmp, /usr, etc.), this could likely lead to data loss or an unusable system.
References
- https://security-tracker.debian.org/tracker/CVE-2019-8320
- https://blog.rubygems.org/2019/03/05/security-advisories-2019-03.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-8320
- https://hackerone.com/reports/317321
- https://lists.debian.org/debian-lts-announce/2020/08/msg00027.html
- https://access.redhat.com/errata/RHSA-2019:1429
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2019-8320