Directory Traversal Affecting ruby2.5-stdlib package, versions <2.5.5-4.3.1
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-SLES151-RUBY25STDLIB-2745955
- published14 Apr 2022
- disclosed10 Jul 2019
Introduced: 10 Jul 2019
CVE-2019-8320 (opens in a new tab)How to fix?
Upgrade SLES:15.1 ruby2.5-stdlib to version 2.5.5-4.3.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ruby2.5-stdlib package and not the ruby2.5-stdlib package as distributed by SLES.
See How to fix? for SLES:15.1 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://www.suse.com/security/cve/CVE-2019-8320.html
- https://bugzilla.suse.com/1130627
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
- https://access.redhat.com/errata/RHSA-2019:1429
- https://blog.rubygems.org/2019/03/05/security-advisories-2019-03.html
- https://hackerone.com/reports/317321
- https://lists.debian.org/debian-lts-announce/2020/08/msg00027.html