CVE-2013-0340
expat 2.1.0 and earlier 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.
02 / AFFECTED SOFTWARE
Affected packages
292 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
expat 2.1.0 and earlier 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.
expat 2.1.0 and earlier 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.
05 / REFERENCES
Further evidence
- http://openwall.com/lists/oss-security/2013/02/22/3
- http://seclists.org/fulldisclosure/2021/Oct/61
- http://seclists.org/fulldisclosure/2021/Oct/62
- http://seclists.org/fulldisclosure/2021/Oct/63
- http://seclists.org/fulldisclosure/2021/Sep/33
- http://seclists.org/fulldisclosure/2021/Sep/34
- http://seclists.org/fulldisclosure/2021/Sep/35
- http://seclists.org/fulldisclosure/2021/Sep/38
- http://seclists.org/fulldisclosure/2021/Sep/39
- http://seclists.org/fulldisclosure/2021/Sep/40
- http://securitytracker.com/id?1028213
- http://www.openwall.com/lists/oss-security/2013/04/12/6
- http://www.openwall.com/lists/oss-security/2021/10/07/4
- http://www.osvdb.org/90634
- http://www.securityfocus.com/bid/58233
- https://lists.apache.org/thread.html/r41eca5f4f09e74436cbb05dec450fc2bef37b5d3e966aa7cc5fada6d%40%3Cannounce.apache.org%3E
- https://lists.apache.org/thread.html/rfb2c193360436e230b85547e85a41bea0916916f96c501f5b6fc4702%40%3Cusers.openoffice.apache.org%3E
- https://security.gentoo.org/glsa/201701-21
- https://support.apple.com/kb/HT212804
- https://support.apple.com/kb/HT212805
- https://support.apple.com/kb/HT212807
- https://support.apple.com/kb/HT212814
- https://support.apple.com/kb/HT212815
- https://support.apple.com/kb/HT212819
- https://blog.hartwork.org/posts/cve-2013-0340-billion-laughs-fixed-in-expat-2-4-0/
- https://bugs.python.org/issue44394