libxml2 - security update


Several security vulnerabilities were corrected in libxml2, the GNOME XML library. * [CVE-2017-8872](https://security-tracker.debian.org/tracker/CVE-2017-8872) Global buffer-overflow in the htmlParseTryOrFinish function. * [CVE-2017-18258](https://security-tracker.debian.org/tracker/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](https://security-tracker.debian.org/tracker/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](https://security-tracker.debian.org/tracker/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](https://security-tracker.debian.org/tracker/CVE-2019-19956) The xmlParseBalancedChunkMemoryRecover function has a memory leak related to newDoc->oldNs. * [CVE-2019-20388](https://security-tracker.debian.org/tracker/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](https://security-tracker.debian.org/tracker/CVE-2020-7595) Infinite loop in xmlStringLenDecodeEntities can cause a denial of service. * [CVE-2020-24977](https://security-tracker.debian.org/tracker/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> 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>

Affected Software

CPE Name Name Version
libxml2 2.9.4+dfsg1-2.2
libxml2 2.9.4+dfsg1-2.2+deb9u1
libxml2 2.9.4+dfsg1-2.2+deb9u2