Heap-based Buffer Overflow in Microsoft ASN.1 Library (MSASN1.DLL) Allows Remote Code Execution

CVE-2005-1935 · HIGH Severity

AV:N/AC:L/AU:N/C:P/I:P/A:P

Heap-based buffer overflow in the BERDecBitString function in Microsoft ASN.1 library (MSASN1.DLL) allows remote attackers to execute arbitrary code via nested constructed bit strings, which leads to a realloc of a non-null pointer and causes the function to overwrite previously freed memory, as demonstrated using a SPNEGO token with a constructed bit string during HTTP authentication, and a different vulnerability than CVE-2003-0818. NOTE: the researcher has claimed that MS:MS04-007 fixes this issue.

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