Resource management error in libexpat expat



| Updated: 2020-08-03
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2012-0876
CWE-ID CWE-399
Exploitation vector Network
Public exploit N/A
Vulnerable software
 expat
Universal components / Libraries / Libraries used by multiple products

Vendor libexpat.org

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Resource management error

EUVDB-ID: #VU33114

Risk: Medium

CVSSv4.0: 2.7 [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-2012-0876

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The XML parser (xmlparse.c) in expat before 2.1.0 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via an XML file with many identifiers with the same value.

Mitigation

Install update from vendor's website.

Vulnerable software versions

expat: 2.0.0 - 2.0.1

CPE2.3 External links

https://bugs.python.org/issue13703#msg151870
https://lists.apple.com/archives/security-announce/2013/Oct/msg00004.html
https://lists.apple.com/archives/security-announce/2015/Dec/msg00005.html
https://mail.libexpat.org/pipermail/expat-discuss/2012-March/002768.html
https://rhn.redhat.com/errata/RHSA-2012-0731.html
https://rhn.redhat.com/errata/RHSA-2016-0062.html
https://rhn.redhat.com/errata/RHSA-2016-2957.html
https://secunia.com/advisories/49504
https://secunia.com/advisories/51024
https://secunia.com/advisories/51040
https://sourceforge.net/projects/expat/files/expat/2.1.0/
https://sourceforge.net/tracker/?func=detail&atid=110127&aid=3496608&group_id=10127
https://www.debian.org/security/2012/dsa-2525
https://www.mandriva.com/security/advisories?name=MDVSA-2012:041
https://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
https://www.securityfocus.com/bid/52379
https://www.ubuntu.com/usn/USN-1527-1
https://www.ubuntu.com/usn/USN-1613-1
https://www.ubuntu.com/usn/USN-1613-2
https://support.apple.com/HT205637
https://www.tenable.com/security/tns-2016-20


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.



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