Debian LTS: DLA-2369-1: libxml2 security update
Summary
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/source-package/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