NULL Pointer Dereference in lxml/lxml
概要
NULL Pointer Dereference in lxml/lxml
原文の説明
取得元が公開している説明をそのまま載せています (多くは英語)。
NULL Pointer Dereference allows attackers to cause a denial of service (or application crash). This only applies when lxml is used together with libxml2 2.9.10 through 2.9.14. libxml2 2.9.9 and earlier are not affected. It allows triggering crashes through forged input data, given a vulnerable code sequence in the application. The vulnerability is caused by the iterwalk function (also used by the canonicalize function). Such code shouldn't be in wide-spread use, given that parsing + iterwalk would usually be replaced with the more efficient iterparse function. However, an XML converter that serialises to C14N would also be vulnerable, for example, and there are legitimate use cases for this code sequence. If untrusted input is received (also remotely) and processed via iterwalk function, a crash can be triggered.
出典: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
ディストリビューション別の修正状況
各ディストリビューションが公開している、この CVE の修正パッケージ
- Alpine Linux ALPINE-CVE-2022-2309 libxml2 修正版: 2.9.14-r1
- Debian DEBIAN-CVE-2022-2309 libxml2 修正版: 2.9.10+dfsg-6.7+deb11u5
- Ubuntu UBUNTU-CVE-2022-2309 lxml
参照URL
- advisory github.com
- advisory lists.fedoraproject.org
- advisory lists.fedoraproject.org
- advisory nvd.nist.gov
- advisory security.gentoo.org
- advisory security.netapp.com
- patch github.com
- web huntr.dev
- web lists.debian.org