Libexpat Project: >> Libexpat >> 2.0.1 Security Vulnerabilities
lookup in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
CVSS Score
8.8
EPSS Score
0.002
Published
2022-01-10
In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.
CVSS Score
8.1
EPSS Score
0.039
Published
2022-01-06
In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).
CVSS Score
8.8
EPSS Score
0.004
Published
2022-01-01
In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read.
CVSS Score
7.5
EPSS Score
0.004
Published
2019-09-04
In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).
CVSS Score
7.5
EPSS Score
0.008
Published
2019-06-24
XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.
CVSS Score
7.5
EPSS Score
0.002
Published
2017-07-25
The overflow protection in Expat is removed by compilers with certain optimization settings, which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via crafted XML data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-1283 and CVE-2015-2716.
CVSS Score
8.1
EPSS Score
0.046
Published
2016-06-30
The XML parser in Expat does not use sufficient entropy for hash initialization, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted identifiers in an XML document. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-0876.
CVSS Score
7.5
EPSS Score
0.004
Published
2016-06-16
Expat, when used in a parser that has not called XML_SetHashSalt or passed it a seed of 0, makes it easier for context-dependent attackers to defeat cryptographic protection mechanisms via vectors involving use of the srand function.
CVSS Score
5.9
EPSS Score
0.007
Published
2016-06-16
Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a malformed input document, which triggers a buffer overflow.
CVSS Score
9.8
EPSS Score
0.015
Published
2016-05-26