Permissions, Privileges, and Access Controls in Ruby - CVE-2012-4522
Published: November 24, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU43297
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2012-4522
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Ruby
Affected software:
Ruby
Ruby
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to manipulate data.
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.
How to mitigate CVE-2012-4522
Install update from vendor's website.
Sources
- 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/