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.
References
Link | Resource |
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https://github.com/lxml/lxml/commit/86368e9cf70a0ad23cccd5ee32de847149af0c6f | Patch Third Party Advisory |
https://huntr.dev/bounties/8264e74f-edda-4c40-9956-49de635105ba | Exploit Issue Tracking Patch Third Party Advisory |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HGYC6L7ENH5VEGN3YWFBYMGKX6WNS7HZ/ | |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/URHHSIBTPTALXMECRLAC2EVDNAFSR5NO/ | |
https://security.gentoo.org/glsa/202208-06 | Third Party Advisory |
https://security.netapp.com/advisory/ntap-20220915-0006/ | Third Party Advisory |
Configurations
History
07 Nov 2023, 03:46
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Information
Published : 2022-07-05 10:15
Updated : 2024-02-28 19:29
NVD link : CVE-2022-2309
Mitre link : CVE-2022-2309
CVE.ORG link : CVE-2022-2309
JSON object : View
Products Affected
fedoraproject
- fedora
xmlsoft
- libxml2
lxml
- lxml
CWE
CWE-476
NULL Pointer Dereference