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High 7.5
libexpat through 2.9.0 Denial of Service via Billion Laughs Detection Delay
libexpat through 2.9.0 contains a denial of service vulnerability because billion laughs protection in accountingDiffTolerated() in xmlparse.c detects entity amplification too late. Attackers can supply a moderately sized XML document with a large DTD and nes…
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High 8.2
libexpat Heap Buffer Over-read in xmlparse.c via XML_ParseBuffer
libexpat before commit 13c5f63 contains a heap buffer over-read vulnerability in xmlparse.c. XML_ParseBuffer advances the parse buffer end with parser->m_bufferEnd += len using a caller-supplied length that is not validated against the allocated buffer size, …
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High 7.5
Expat before 2.8.5 Malformed UTF-16 Acceptance via Unchecked Surrogate
Expat before 2.8.5 fails to validate that a high surrogate in UTF-16 input is followed by a low surrogate, allowing malformed UTF-16 sequences to be accepted. Attackers can supply UTF-16 encoded XML containing lone high surrogates that consume the following c…
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High 7.5
Expat Out-of-Bounds Read via dtdCopy
Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members …
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High 7.5
Expat Denial of Service via storeAtts() Quadratic Complexity
Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an O(N^2) linear scan of elementTy…
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High 7.5
libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that i…
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High 7.5CVE-2024-8176 Public exploit
Libexpat: expat: improper restriction of xml entity expansion depth in libexpat
A stack overflow vulnerability exists in the libexpat library due to the way it handles recursive entity expansion in XML documents. When parsing an XML document with deeply nested entity references, libexpat can be forced to recurse indefinitely, exhausting …
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High 7.3
An issue was discovered in libexpat before 2.6.3. nextScaffoldPart in xmlparse.c can have an integer overflow for m_gro…
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High 7.3
An issue was discovered in libexpat before 2.6.3. dtdCopy in xmlparse.c can have an integer overflow for nDefaultAtts o…
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High 7.5CVE-2024-28757 Public exploit
libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created vi…
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High 7.5
libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in t…
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High 7.5CVE-2022-43680 Public exploit
In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in XML_ExternalEnt…
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High 8.1
libexpat before 2.4.9 has a use-after-free in the doContent function in xmlparse.c.
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High 7.5CVE-2022-25314 Public exploit
In Expat (aka libexpat) before 2.4.5, there is an integer overflow in copyString.
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High 7.5CVE-2022-23990 Public exploit
Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function.
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High 8.8
lookup in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
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High 8.8
nextScaffoldPart in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
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High 8.8
storeAtts in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
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High 8.1CVE-2021-46143 Public exploit
In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.
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High 8.8CVE-2021-45960 Public exploit
In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can l…