Advisories

libexpat 2.7.2 through 2.9.0 Denial of Service via XML_ParserReset

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Severity
high
Date
Affecting
  • libexpat >= 2.7.2, <= 2.9.0

CWE
  • CWE-909 Missing Initialization of Resource
CVSS
8.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Jasper
Description
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 with XML_ERROR_NO_MEMORY until it is recreated.

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