CVE-2022-2309
Libxml2 NULL Pointer Dereference Denial of Service Vulnerability in lxml
Description
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.
INFO
Published Date :
July 5, 2022, 10:15 a.m.
Last Modified :
Nov. 7, 2023, 3:46 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2022-2309 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2022-2309.
| URL | Resource |
|---|---|
| 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
A centralized repository of standalone security patches for open source libraries.
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Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2022-2309 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-2309 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference huntr.dev https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/URHHSIBTPTALXMECRLAC2EVDNAFSR5NO/ [No types assigned] Added Reference huntr.dev https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HGYC6L7ENH5VEGN3YWFBYMGKX6WNS7HZ/ [No types assigned] Removed Reference huntr.dev https://lists.fedoraproject.org/archives/list/[email protected]/message/URHHSIBTPTALXMECRLAC2EVDNAFSR5NO/ Removed Reference huntr.dev https://lists.fedoraproject.org/archives/list/[email protected]/message/HGYC6L7ENH5VEGN3YWFBYMGKX6WNS7HZ/ -
Modified Analysis by [email protected]
Oct. 28, 2022
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/HGYC6L7ENH5VEGN3YWFBYMGKX6WNS7HZ/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/HGYC6L7ENH5VEGN3YWFBYMGKX6WNS7HZ/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/URHHSIBTPTALXMECRLAC2EVDNAFSR5NO/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/URHHSIBTPTALXMECRLAC2EVDNAFSR5NO/ Mailing List, Third Party Advisory Changed Reference Type https://security.gentoo.org/glsa/202208-06 No Types Assigned https://security.gentoo.org/glsa/202208-06 Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20220915-0006/ No Types Assigned https://security.netapp.com/advisory/ntap-20220915-0006/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Sep. 24, 2022
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/HGYC6L7ENH5VEGN3YWFBYMGKX6WNS7HZ/ [No Types Assigned] -
CVE Modified by [email protected]
Sep. 18, 2022
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/URHHSIBTPTALXMECRLAC2EVDNAFSR5NO/ [No Types Assigned] -
CVE Modified by [email protected]
Sep. 15, 2022
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20220915-0006/ [No Types Assigned] -
CVE Modified by [email protected]
Aug. 10, 2022
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202208-06 [No Types Assigned] -
Initial Analysis by [email protected]
Jul. 13, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/lxml/lxml/commit/86368e9cf70a0ad23cccd5ee32de847149af0c6f No Types Assigned https://github.com/lxml/lxml/commit/86368e9cf70a0ad23cccd5ee32de847149af0c6f Patch, Third Party Advisory Changed Reference Type https://huntr.dev/bounties/8264e74f-edda-4c40-9956-49de635105ba No Types Assigned https://huntr.dev/bounties/8264e74f-edda-4c40-9956-49de635105ba Exploit, Issue Tracking, Patch, Third Party Advisory Added CPE Configuration AND OR *cpe:2.3:a:lxml:lxml:*:*:*:*:*:*:*:* versions up to (excluding) 4.9.1 OR cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:* versions from (including) 2.9.10 up to (including) 2.9.14
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-2309 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-2309
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.46 }} 0.08%
score
0.74721
percentile