CVE-2012-4522

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-11-24 · updated 2026-06-16
Weakness: CWE-264

Description

The rb_get_path_check function in file.c in Ruby 1.9.3 before patchlevel 286 and Ruby 2.0.0 before r37163 allows context-dependent attackers to create files in unexpected locations or with unexpected names via a NUL byte in a file path.

Affected products

Ruby: 1.9.3, 2.0.0

References

http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090235.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090515.html
http://rhn.redhat.com/errata/RHSA-2013-0129.html
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=37163
http://www.openwall.com/lists/oss-security/2012/10/12/6
http://www.openwall.com/lists/oss-security/2012/10/13/1
http://www.openwall.com/lists/oss-security/2012/10/16/1
http://www.ruby-lang.org/en/news/2012/10/12/poisoned-NUL-byte-vulnerability/
http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090235.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090515.html
http://rhn.redhat.com/errata/RHSA-2013-0129.html
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=37163

Get alerted when CVE-2012-4522 or the next vulnerability affects your stack