------------------------------------------------------------------------- Debian LTS Advisory DLA-3783-1 debian-...@lists.debian.org https://www.debian.org/lts/security/ Tobias Frost April 07, 2024 https://wiki.debian.org/LTS -------------------------------------------------------------------------
Package : expat Version : 2.2.6-2+deb10u7 CVE ID : CVE-2023-52425 Debian Bug : 1063238 Expat, an XML parsing C library has been found to have an vulnerability that allows an attacker to perform a denial of service (resource consumption, when many full reparsings are required in the case of a large tokens. When parsing a really big token that requires multiple buffer fills to complete, expat has to re-parse the token from start multiple times, which takes time. These patches introduce a heuristic that, when having failed on the same token multiple times, defers further parsing until there's significantly more data available. The patch also introduces an optiional API, XML_SetReparseDeferralEnabled(), to disable the new heuristic. For Debian 10 buster, this problem has been fixed in version 2.2.6-2+deb10u7. We recommend that you upgrade your expat packages. For the detailed security status of expat please refer to its security tracker page at: https://security-tracker.debian.org/tracker/expat Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS
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