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Last updated: 5/25/2016 2:45:06 PM

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National Cyber Awareness System

Vulnerability Summary for CVE-2013-1864

Original release date: 05/23/2014
Last revised: 01/14/2015


The Portable Tool Library (aka PTLib) before 2.10.10, as used in Ekiga before 4.0.1, does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption) via a crafted PXML document containing a large number of nested entity references, aka a "billion laughs attack."


CVSS Severity (version 2.0):
CVSS v2 Base Score: 4.3 MEDIUM
Impact Subscore: 2.9
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: CONFIRM
Name: http://sourceforge.net/p/opalvoip/code/28856
Type: Patch Information; Exploit
External Source: MLIST
Name: [oss-security] 20130315 Re: CVE request: billion laughs flaw in ptlib
External Source: SUSE
Name: SUSE-SU-2014:0237
External Source: BID
Name: 58520
External Source: CONFIRM
Name: http://www.ekiga.org/news/2013-02-21/ekiga-4.0.1-stable-available
Type: Advisory; Patch Information
External Source: XF
Name: ptlib-xml-dos(82885)
External Source: FEDORA
Name: FEDORA-2013-2998

Technical Details

Vulnerability Type (View All)

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