CVE-2013-0340

Expat is a C library for parsing XML documents.

Security Fix(es):

• expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing (CVE-2025-59375)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

• Rebase to version 2.5.0
• CVE-2024-28757: prevent billion laughs attacks in isolated external parser (part of #839), reject direct parameter entity recursion (part of #839)
• CVE-2025-59375: fix memory amplification and add allocation tracker
• CVE-2013-0340: properly handle entities expansion

• Rebase to version 2.5.0
• CVE-2024-28757: prevent billion laughs attacks in isolated external parser (part of #839), reject direct parameter entity recursion (part of #839)
• CVE-2025-59375: fix memory amplification and add allocation tracker
• CVE-2013-0340: properly handle entities expansion

• Rebase to version 2.5.0
• CVE-2024-28757: prevent billion laughs attacks in isolated external parser (part of #839), reject direct parameter entity recursion (part of #839)
• CVE-2025-59375: fix memory amplification and add allocation tracker
• CVE-2013-0340: properly handle entities expansion

• CVE-2017-9233: fix external entity infinite loop in entityValueInitProcessor and entityValueProcessor
• CVE-2023-52425: add reparse deferral heuristic to prevent O(n^2) parsing of large tokens in small buffer refills; fix buffer growth calculation
• CVE-2013-0340: add billion laughs (entity expansion bomb) attack protection with amplification limit (100x max, 8 MiB activation threshold); includes fix for isolated external parser bypass (CVE-2024-28757)
• CVE-2024-28757: add billion laughs (entity expansion bomb) attack protection with amplification limit (100x max, 8 MiB activation threshold); includes fix for isolated external parser bypass (CVE-2024-28757)

• CVE-2017-9233: fix external entity infinite loop in entityValueInitProcessor and entityValueProcessor
• CVE-2023-52425: add reparse deferral heuristic to prevent O(n^2) parsing of large tokens in small buffer refills; fix buffer growth calculation
• CVE-2013-0340: add billion laughs (entity expansion bomb) attack protection with amplification limit (100x max, 8 MiB activation threshold); includes fix for isolated external parser bypass (CVE-2024-28757)
• CVE-2024-28757: add billion laughs (entity expansion bomb) attack protection with amplification limit (100x max, 8 MiB activation threshold); includes fix for isolated external parser bypass (CVE-2024-28757)

• CVE-2017-9233: fix external entity infinite loop in entityValueInitProcessor and entityValueProcessor
• CVE-2023-52425: add reparse deferral heuristic to prevent O(n^2) parsing of large tokens in small buffer refills; fix buffer growth calculation
• CVE-2013-0340: add billion laughs (entity expansion bomb) attack protection with amplification limit (100x max, 8 MiB activation threshold); includes fix for isolated external parser bypass (CVE-2024-28757)
• CVE-2024-28757: add billion laughs (entity expansion bomb) attack protection with amplification limit (100x max, 8 MiB activation threshold); includes fix for isolated external parser bypass (CVE-2024-28757)

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 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.

expat is a stream-oriented XML parser library written in C. expat excels with files too large to fit RAM, and where performance and flexibility are crucial.

Security Fix(es):

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.(CVE-2013-0340)

These are all security issues fixed in the expat-2.4.1-1.2 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python38-3.8.12-1.2 package on the GA media of openSUSE Tumbleweed.

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.

This update for expat fixes the following issues:

Version update to 2.7.1:

• Bug fixes:

  • Restore event pointer behavior from Expat 2.6.4 (that the fix to CVE-2024-8176 changed in 2.7.0); affected API functions are:

    • XML_GetCurrentByteCount
    • XML_GetCurrentByteIndex
    • XML_GetCurrentColumnNumber
    • XML_GetCurrentLineNumber
    • XML_GetInputContext

  • Other changes: #976 #977 Autotools: Integrate files "fuzz/xml_lpm_fuzzer.{cpp,proto}" with Automake that were missing from 2.7.0 release tarballs #983 #984 Fix printf format specifiers for 32bit Emscripten #992 docs: Promote OpenSSF Best Practices self-certification #978 tests/benchmark: Resolve mistaken double close #986 Address compiler warnings #990 #993 Version info bumped from 11:1:10 (libexpat*.so.1.10.1) to 11:2:10 (libexpat*.so.1.10.2); see https://verbump.de/ for what these numbers do

    Infrastructure:
        #982  CI: Start running Perl XML::Parser integration tests
        #987  CI: Enforce Clang Static Analyzer clean code
        #991  CI: Re-enable warning clang-analyzer-valist.Uninitialized
                for clang-tidy
        #981  CI: Cover compilation with musl
    

    #983 #984 CI: Cover compilation with 32bit Emscripten #976 #977 CI: Protect against fuzzer files missing from future release archives

Version update to 2.7.0 (CVE-2024-8176 [bsc#1239618])

• Security fixes:

  • CVE-2024-8176 -- Fix crash from chaining a large number of entities caused by stack overflow by resolving use of recursion, for all three uses of entities:
    • general entities in character data ("<e>&g1;</e>")
    • general entities in attribute values ("<e k1='&g1;'/>")
    • parameter entities ("%p1;")

  Known impact is (reliable and easy) denial of service:

  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:H/RL:O/RC:C

  (Base Score: 7.5, Temporal Score: 7.2)

  Please note that a layer of compression around XML can significantly reduce the minimum attack payload size.

  • Other changes:
    • Document changes since the previous release
    • Version info bumped from 11:0:10 (libexpat*.so.1.10.0) to 11:1:10 (libexpat*.so.1.10.1); see https://verbump.de/ for what these numbers do

Version update to 2.6.4:

• Security fixes: [bsc#1232601][bsc#1232579]
  • CVE-2024-50602 -- Fix crash within function XML_ResumeParser from a NULL pointer dereference by disallowing function XML_StopParser to (stop or) suspend an unstarted parser. A new error code XML_ERROR_NOT_STARTED was introduced to properly communicate this situation. // CWE-476 CWE-754
• Other changes:
  • Version info bumped from 10:3:9 (libexpat*.so.1.9.3) to 11:0:10 (libexpat*.so.1.10.0); see https://verbump.de/ for what these numbers do

Update to 2.6.3:

• Security fixes:
  • CVE-2024-45490, bsc#1229930 -- Calling function XML_ParseBuffer with len < 0 without noticing and then calling XML_GetBuffer will have XML_ParseBuffer fail to recognize the problem and XML_GetBuffer corrupt memory. With the fix, XML_ParseBuffer now complains with error XML_ERROR_INVALID_ARGUMENT just like sibling XML_Parse has been doing since Expat 2.2.1, and now documented. Impact is denial of service to potentially artitrary code execution.
  • CVE-2024-45491, bsc#1229931 -- Internal function dtdCopy can have an integer overflow for nDefaultAtts on 32-bit platforms (where UINT_MAX equals SIZE_MAX). Impact is denial of service to potentially artitrary code execution.
  • CVE-2024-45492, bsc#1229932 -- Internal function nextScaffoldPart can have an integer overflow for m_groupSize on 32-bit platforms (where UINT_MAX equals SIZE_MAX). Impact is denial of service to potentially…

This update for expat fixes the following issues:

Version update to 2.7.1:

 Bug fixes:

   #980 #989  Restore event pointer behavior from Expat 2.6.4
                (that the fix to CVE-2024-8176 changed in 2.7.0);
                affected API functions are:
                - XML_GetCurrentByteCount
                - XML_GetCurrentByteIndex
                - XML_GetCurrentColumnNumber
                - XML_GetCurrentLineNumber
                - XML_GetInputContext

 Other changes:

   #976 #977  Autotools: Integrate files "fuzz/xml_lpm_fuzzer.{cpp,proto}"
                with Automake that were missing from 2.7.0 release tarballs
   #983 #984  Fix printf format specifiers for 32bit Emscripten
        #992  docs: Promote OpenSSF Best Practices self-certification
        #978  tests/benchmark: Resolve mistaken double close
        #986  Address compiler warnings
   #990 #993  Version info bumped from 11:1:10 (libexpat*.so.1.10.1)
                to 11:2:10 (libexpat*.so.1.10.2); see https://verbump.de/
                for what these numbers do

    Infrastructure:

        #982  CI: Start running Perl XML::Parser integration tests
        #987  CI: Enforce Clang Static Analyzer clean code
        #991  CI: Re-enable warning clang-analyzer-valist.Uninitialized
                for clang-tidy
        #981  CI: Cover compilation with musl
   #983 #984  CI: Cover compilation with 32bit Emscripten
   #976 #977  CI: Protect against fuzzer files missing from future
                release archives

version update to 2.7.0 (CVE-2024-8176 [bsc#1239618]):

• Security fixes:

  #893 #973 CVE-2024-8176 -- Fix crash from chaining a large number of entities caused by stack overflow by resolving use of recursion, for all three uses of entities: - general entities in character data ("<e>&g1;</e>") - general entities in attribute values ("<e k1='&g1;'/>") - parameter entities ("%p1;") Known impact is (reliable and easy) denial of service: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:H/RL:O/RC:C (Base Score: 7.5, Temporal Score: 7.2) Please note that a layer of compression around XML can significantly reduce the minimum attack payload size.

• Other changes: #935 #937 Autotools: Make generated CMake files look for libexpat.@[email protected] on macOS #925 Autotools: Sync CMake templates with CMake 3.29 #945 #962 #966 CMake: Drop support for CMake <3.13 #942 CMake: Small fuzzing related improvements #921 docs: Add missing documentation of error code XML_ERROR_NOT_STARTED that was introduced with 2.6.4 #941 docs: Document need for C++11 compiler for use from C++ #959 tests/benchmark: Fix a (harmless) TOCTTOU #944 Windows: Fix installer target location of file xmlwf.xml for CMake #953 Windows: Address warning -Wunknown-warning-option about -Wno-pedantic-ms-format from LLVM MinGW #971 Address Cppcheck warnings #969 #970 Mass-migrate links from http:// to https:// #947 #958 .. #974 #975 Document changes since the previous release #974 #975 Version info bumped from 11:0:10 (libexpat*.so.1.10.0) to 11:1:10 (libexpat*.so.1.10.1); see https://verbump.de/ for what these numbers do

• no source changes, just adding jira reference: jsc#SLE-21253

Version update to 2.6.4

• Security fixes: [bsc#1232601][bsc#1232579] #915 CVE-2024-50602 -- Fix crash within function XML_ResumeParser from a NULL pointer dereference by disallowing function …