GHSA-5x32-c9mf-49cc

Source

https://github.com/advisories/GHSA-5x32-c9mf-49cc

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2019/06/GHSA-5x32-c9mf-49cc/GHSA-5x32-c9mf-49cc.json

Aliases

• CVE-2019-8320

Published

2019-06-20T16:06:15Z

Modified

2024-02-16T08:13:45.798960Z

Summary

RubyGems Delete directory using symlink when decompressing tar

Details

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://nvd.nist.gov/vuln/detail/CVE-2019-8320
• https://hackerone.com/reports/317321
• https://access.redhat.com/errata/RHSA-2019:1429
• https://blog.rubygems.org/2019/03/05/security-advisories-2019-03.html
• https://github.com/rubygems/rubygems
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rubygems-update/CVE-2019-8320.yml
• https://lists.debian.org/debian-lts-announce/2020/08/msg00027.html
• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html