#VU33123 Cross-site scripting - CVE-2011-2931
Vulnerability identifier: #VU33123
Vulnerability risk: Low
CVSSv4.0: 2.7 [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:Clear]
CVE-ID:
CWE-ID:
CWE-79
Exploitation vector: Network
Exploit availability: No
Description
Vulnerability allows a remote attacker to perform XSS attacks.
The vulnerability is caused by an input validation error in the strip_tags helper in actionpack/lib/action_controller/vendor/html-scanner/html/node.rb in Ruby on Rails before 2.3.13, 3.0.x before 3.0.10, and 3.1.x before 3.1.0.rc5. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
External links
https://groups.google.com/group/rubyonrails-security/msg/fd41ab62966e0fd1?dmode=source&output=gplain
https://lists.fedoraproject.org/pipermail/package-announce/2011-September/065109.html
https://lists.fedoraproject.org/pipermail/package-announce/2011-September/065137.html
https://lists.fedoraproject.org/pipermail/package-announce/2011-September/065212.html
https://secunia.com/advisories/45921
https://weblog.rubyonrails.org/2011/8/16/ann-rails-3-1-0-rc6
https://www.debian.org/security/2011/dsa-2301
https://www.openwall.com/lists/oss-security/2011/08/17/1
https://www.openwall.com/lists/oss-security/2011/08/19/11
https://www.openwall.com/lists/oss-security/2011/08/20/1
https://www.openwall.com/lists/oss-security/2011/08/22/13
https://www.openwall.com/lists/oss-security/2011/08/22/14
https://www.openwall.com/lists/oss-security/2011/08/22/5
https://bugzilla.redhat.com/show_bug.cgi?id=731436
https://github.com/rails/rails/commit/586a944ddd4d03e66dea1093306147594748037a
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
