54 results · Feed
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Medium 4.8
libexpat through 2.10.0 Out-of-Bounds Read via unknown_toUtf8 and unknown_toUtf16
libexpat through 2.10.0 contains an out-of-bounds read vulnerability in unknown_toUtf8() and unknown_toUtf16() in xmltok.c when handling application-registered unknown encodings. Attackers can supply a document ending in a truncated multibyte sequence so the …
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Medium 5.9
libexpat through 2.9.0 Integer Overflow in storeAtts via attIndex and nPrefixes
libexpat through 2.9.0 contains a signed integer overflow vulnerability in storeAtts() in lib/xmlparse.c that allows attackers to trigger out-of-bounds writes via oversized attribute counts. Attackers can supply a multi-gigabyte document with a start tag carr…
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Medium 5.9
libexpat through 2.9.0 NULL Pointer Dereference via External Entity Subparser
libexpat through 2.9.0 contains a NULL pointer dereference vulnerability in externalEntityInitProcessor2() in lib/xmlparse.c that mishandles the XML_TOK_NONE token from empty input. Attackers who control stream chunking can force an empty non-final first pars…
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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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Medium 5.9
libexpat 2.7.2 through 2.9.0 Denial of Service via XML_ParserReset
libexpat 2.7.2 through 2.9.0 contains a denial of service vulnerability because XML_ParserReset zeroes the direct byte count but never offsets tracked heap allocations. Attackers can submit a large XML document so later documents on the same reset parser fail…
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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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Medium 5.9
libexpat 2.7.2 through 2.8.5 Integer Overflow in expat_realloc
libexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in expat_realloc() function on 32-bit platforms when computing allocation sizes. Attackers supplying malicious XML to applications parsing with vulnerable libexpat can cause heap …
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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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Medium 4.9
libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occu…
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Medium 5.9
In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, …
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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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Medium 6.2
libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same…
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Medium 4.9
libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking…
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Medium 6.9
xmlwf in libexpat before 2.8.2 has an integer overflow in endDoctypeDecl via NOTATION declarations.
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Medium 6.9
xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId.
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Medium 6.5
xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used.
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Medium 6.9
libexpat before 2.8.2 has an integer overflow in copyString.
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Medium 6.9
libexpat before 2.8.2 has an integer overflow in doProlog that is related to storeEntityValue and entity textLen.
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Medium 6.9
libexpat before 2.8.2 has an integer overflow in XML_ParseBuffer because it lacked a check that was present in XML_Pars…
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Medium 6.9
libexpat before 2.8.2 has an integer overflow in getAttributeId.
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Medium 6.9
libexpat before 2.8.2 has an integer overflow in addBinding.
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Medium 6.9
libexpat before 2.8.2 has an integer overflow in storeAtts.
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Medium 4.9
libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of …
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Medium 4.9
libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_Par…
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Low 2.9
In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service vi…
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Low 2.9
libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
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Low 2.9
libexpat before 2.7.5 allows a NULL pointer dereference in the function setContext on retry after an earlier ouf-of-mem…
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Medium 4.0
libexpat before 2.7.5 allows an infinite loop while parsing DTD content.
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Medium 4.0
libexpat before 2.7.5 allows a NULL pointer dereference with empty external parameter entity content.
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Medium 6.9
In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is n…
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Low 2.9
In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data.
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Low 2.9
In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing…
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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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Critical 9.8CVE-2024-45490 Public exploit
An issue was discovered in libexpat before 2.6.3. xmlparse.c does not reject a negative length for XML_ParseBuffer.
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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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Critical 9.8CVE-2022-25235 Public exploit
xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a U…