Vulnerability Monitor

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CVE-2013-0340

expat before version 2.4.0 does not properly handle entities expansion unless an application developer uses the XML_SetEntityDeclHandler function, which allows remote attackers to cause a denial of service (resource consumption), send HTTP requests to intranet servers, or read arbitrary files via a crafted XML document, aka an XML External Entity (XXE) issue. NOTE: it could be argued that because expat already provides the ability to disable external entity expansion, the responsibility for resolving this issue lies with application developers; according to this argument, this entry should be REJECTed, and each affected application would need its own CVE.

Published

2014-01-21T18:55:09.117

Last Modified

2025-11-25T17:15:47.723

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 6.8 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

6.4

Weaknesses

Type: Primary
CWE-611

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	libexpat_project	libexpat	< 2.4.0	Yes
Application	python	python	< 3.6.15	Yes
Application	python	python	< 3.7.12	Yes
Application	python	python	< 3.8.12	Yes
Application	python	python	< 3.9.7	Yes
Operating System	apple	ipados	< 14.8	Yes
Operating System	apple	iphone_os	< 14.8	Yes
Operating System	apple	macos	< 11.6	Yes
Operating System	apple	tvos	< 15.0	Yes
Operating System	apple	watchos	< 8.0	Yes

References

http://openwall.com/lists/oss-security/2013/02/22/3 Exploit, Mailing List, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2021/Oct/61 Mailing List, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2021/Oct/62 Mailing List, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2021/Oct/63 Mailing List, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2021/Sep/33 Mailing List, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2021/Sep/34 Mailing List, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2021/Sep/35 Mailing List, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2021/Sep/38 Mailing List, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2021/Sep/39 Mailing List, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2021/Sep/40 Mailing List, Third Party Advisory ([email protected])
http://securitytracker.com/id?1028213 Third Party Advisory, VDB Entry ([email protected])
http://www.openwall.com/lists/oss-security/2013/04/12/6 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2021/10/07/4 Mailing List, Third Party Advisory ([email protected])
http://www.osvdb.org/90634 Broken Link ([email protected])
http://www.securityfocus.com/bid/58233 Broken Link, Third Party Advisory, VDB Entry ([email protected])
https://github.com/libexpat/libexpat/blob/R_2_4_1/expat/Changes ([email protected])
https://lists.apache.org/thread.html/r41eca5f4f09e74436cbb05dec450fc2bef37b5d3e966aa7cc5fada6d%40%3Cannounce.apache.org%3E ([email protected])
https://lists.apache.org/thread.html/rfb2c193360436e230b85547e85a41bea0916916f96c501f5b6fc4702%40%3Cusers.openoffice.apache.org%3E ([email protected])
https://security.gentoo.org/glsa/201701-21 Third Party Advisory ([email protected])
https://support.apple.com/kb/HT212804 Third Party Advisory ([email protected])
https://support.apple.com/kb/HT212805 Third Party Advisory ([email protected])
https://support.apple.com/kb/HT212807 Third Party Advisory ([email protected])
https://support.apple.com/kb/HT212814 Third Party Advisory ([email protected])
https://support.apple.com/kb/HT212815 Third Party Advisory ([email protected])
https://support.apple.com/kb/HT212819 Third Party Advisory ([email protected])
http://openwall.com/lists/oss-security/2013/02/22/3 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2021/Oct/61 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2021/Oct/62 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2021/Oct/63 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2021/Sep/33 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2021/Sep/34 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2021/Sep/35 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2021/Sep/38 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2021/Sep/39 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2021/Sep/40 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://securitytracker.com/id?1028213 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2013/04/12/6 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2021/10/07/4 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.osvdb.org/90634 Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/58233 Broken Link, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://lists.apache.org/thread.html/r41eca5f4f09e74436cbb05dec450fc2bef37b5d3e966aa7cc5fada6d%40%3Cannounce.apache.org%3E (af854a3a-2127-422b-91ae-364da2661108)
https://lists.apache.org/thread.html/rfb2c193360436e230b85547e85a41bea0916916f96c501f5b6fc4702%40%3Cusers.openoffice.apache.org%3E (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201701-21 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/kb/HT212804 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/kb/HT212805 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/kb/HT212807 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/kb/HT212814 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/kb/HT212815 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/kb/HT212819 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)