Resource management error in expat (Alpine package)



Published: 2012-08-15
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
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expat (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) Resource management error

EUVDB-ID: #VU33114

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/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-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 (Alpine package): 2.0.1-r0 - 2.0.1-r6

External links

http://git.alpinelinux.org/aports/commit/?id=e225209377749c969b4b412b62736f706b32c830
http://git.alpinelinux.org/aports/commit/?id=ebc04c0210d45efc4e5156905cdda9900f4f1ad3
http://git.alpinelinux.org/aports/commit/?id=82105c6f2874a73741115858c9a6d520d13355bd


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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