Input validation error in libxml2 (Alpine package)



Published: 2013-04-08
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2013-0338
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		libxml2 (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU32708

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-0338

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows context-dependent attackers to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (CPU and memory consumption) via an XML file containing an entity declaration with long replacement text and many references to this entity, aka "internal entity expansion" with linear complexity.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libxml2 (Alpine package): 2.7.8-r5

CPE2.3 External links

http://git.alpinelinux.org/aports/commit/?id=ce3adccd9865fd634d89940731b9c81c178a9b4c
http://git.alpinelinux.org/aports/commit/?id=bf85783e0da968a916417c375c448ef4b60072e6
http://git.alpinelinux.org/aports/commit/?id=b72318e0a3e37a0556bc8aa0d6029e9fbfd46241


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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