Cross-site scripting in Lxml - CVE-2014-3146

Vulnerability details

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. The vulnerability allows remote attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the clean_html function.

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.

Affected software

How to mitigate CVE-2014-3146

Links to Public Exploits and PoC-codes

• Exploit #4030 - lxml - 'clean_html' Function Security Bypass (August 11, 2020)

External References

• http://advisories.mageia.org/MGASA-2014-0218.html
• http://lists.opensuse.org/opensuse-updates/2014-05/msg00083.html
• http://lxml.de/3.3/changes-3.3.5.html
• http://seclists.org/fulldisclosure/2014/Apr/210
• http://seclists.org/fulldisclosure/2014/Apr/319
• http://secunia.com/advisories/58013
• http://secunia.com/advisories/58744
• http://secunia.com/advisories/59008
• http://www.debian.org/security/2014/dsa-2941
• http://www.mandriva.com/security/advisories?name=MDVSA-2015:112
• http://www.openwall.com/lists/oss-security/2014/05/09/7
• http://www.securityfocus.com/bid/67159
• http://www.ubuntu.com/usn/USN-2217-1
• https://mailman-mail5.webfaction.com/pipermail/lxml/2014-April/007128.html

Related Security Bulletins

• Cross-site scripting in Lxml
• Multiple vulnerabilities in IBM QRadar SIEM
• Multiple vulnerabilities in Juniper Secure Analytics (JSA)