Microsoft security update for CVE-2022-2309
🔗 CVE IDs covered (1)
📋 Microsoft's advisory
EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-2309. This page also shows what EchelonGraph holds for CVE-2022-2309, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.
🎯 Affected products4
- cbl2 libxml2 2.10.0-1 on CBL Mariner 2.0
- cbl2 python-lxml 4.9.1-1 on CBL Mariner 2.0
- cm1 libxml2 2.9.14-2 on CBL Mariner 1.0
- cm1 python-lxml 4.7.1-2 on CBL Mariner 1.0
✅ Updates Microsoft lists: 4 updates
4 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.
| KB article | Update | Fixed build |
|---|---|---|
| — | Security Update | 4.7.1-2 |
| — | Security Update | 2.9.14-2 |
| — | Security Update | 4.9.1-1 |
| — | Security Update | 2.10.0-1 |
🧭 EchelonGraph on CVE-2022-2309
- EchelonGraph score
- 7.5 HIGH
- CISA KEV
- Not listed
- Fix status
- A fix is available — apply it.
Description from the CVE record (CVE.org), as published by its numbering authority
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.
Published by @huntrdev, the CVE Numbering Authority that assigned CVE-2022-2309, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).