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Debian Security Advisory 5391-1
Debian Linux Security Advisory 5391-1 - Several vulnerabilities were discovered in libxml2, a library providing support to read, modify and write XML and HTML files.
-----BEGIN PGP SIGNED MESSAGE-----Hash: SHA512- -------------------------------------------------------------------------Debian Security Advisory DSA-5391-1 [email protected]://www.debian.org/security/ Salvatore BonaccorsoApril 20, 2023 https://www.debian.org/security/faq- -------------------------------------------------------------------------Package : libxml2CVE ID : CVE-2023-28484 CVE-2023-29469Debian Bug : 1034436 1034437Several vulnerabilities were discovered in libxml2, a library providingsupport to read, modify and write XML and HTML files.CVE-2023-28484 A NULL pointer dereference flaw when parsing invalid XML schemas may result in denial of service.CVE-2023-29469 It was reported that when hashing empty strings which aren't null-terminated, xmlDictComputeFastKey could produce inconsistent results, which may lead to various logic or memory errors.For the stable distribution (bullseye), these problems have been fixed inversion 2.9.10+dfsg-6.7+deb11u4.We recommend that you upgrade your libxml2 packages.For the detailed security status of libxml2 please refer to its securitytracker page at:https://security-tracker.debian.org/tracker/libxml2Further information about Debian Security Advisories, how to applythese updates to your system and frequently asked questions can befound at: https://www.debian.org/security/Mailing list: [email protected] PGP SIGNATURE-----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btNX-----END PGP SIGNATURE-----
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An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\0' value).
Ubuntu Security Notice 6028-1 - It was discovered that lixml2 incorrectly handled certain XML files. An attacker could possibly use this issue to cause a crash or execute arbitrary code. It was discovered that libxml2 incorrectly handled certain XML files. An attacker could possibly use this issue to cause a crash.
Ubuntu Security Notice 6028-1 - It was discovered that lixml2 incorrectly handled certain XML files. An attacker could possibly use this issue to cause a crash or execute arbitrary code. It was discovered that libxml2 incorrectly handled certain XML files. An attacker could possibly use this issue to cause a crash.