Debian DLA-2369-1 : libxml2 security update


Several security vulnerabilities were corrected in libxml2, the GNOME XML library. CVE-2017-8872 Global buffer-overflow in the htmlParseTryOrFinish function. CVE-2017-18258 The xz_head function in libxml2 allows remote attackers to cause a denial of service (memory consumption) via a crafted LZMA file, because the decoder functionality does not restrict memory usage to what is required for a legitimate file. CVE-2018-14404 A NULL pointer dereference vulnerability exists in the xpath.c:xmlXPathCompOpEval() function of libxml2 when parsing an invalid XPath expression in the XPATH_OP_AND or XPATH_OP_OR case. Applications processing untrusted XSL format inputs may be vulnerable to a denial of service attack. CVE-2018-14567 If the option --with-lzma is used, allows remote attackers to cause a denial of service (infinite loop) via a crafted XML file. CVE-2019-19956 The xmlParseBalancedChunkMemoryRecover function has a memory leak related to newDoc->oldNs. CVE-2019-20388 A memory leak was found in the xmlSchemaValidateStream function of libxml2. Applications that use this library may be vulnerable to memory not being freed leading to a denial of service. CVE-2020-7595 Infinite loop in xmlStringLenDecodeEntities can cause a denial of service. CVE-2020-24977 Out-of-bounds read restricted to xmllint --htmlout. For Debian 9 stretch, these problems have been fixed in version 2.9.4+dfsg1-2.2+deb9u3. We recommend that you upgrade your libxml2 packages. For the detailed security status of libxml2 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/libxml2 NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.