Input validation error in cgit - CVE-2011-1027
Published: March 20, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU45181
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2011-1027
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Jason A. Donenfeld
Affected software:
cgit
cgit
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
Off-by-one error in the convert_query_hexchar function in html.c in cgit.cgi in cgit before 0.8.3.5 allows remote attackers to cause a denial of service (infinite loop) via a string composed of a % (percent) character followed by invalid hex characters, as demonstrated by a %gg sequence.
How to mitigate CVE-2011-1027
Install update from vendor's website.
Sources
- http://article.gmane.org/gmane.comp.version-control.git/168493
- http://hjemli.net/git/cgit/commit/?h=stable&id=fc384b16fb9787380746000d3cea2d53fccc548e
- http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055896.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055898.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055966.html
- http://openwall.com/lists/oss-security/2011/03/07/3
- http://secunia.com/advisories/43633
- http://secunia.com/advisories/43788
- http://www.osvdb.org/71005
- http://www.securityfocus.com/bid/46756
- http://www.vupen.com/english/advisories/2011/0667
- https://bugzilla.redhat.com/show_bug.cgi?id=680905
- https://exchange.xforce.ibmcloud.com/vulnerabilities/65919