Microsoft security update for CVE-2021-33503
🔗 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-2021-33503. This page also shows what EchelonGraph holds for CVE-2021-33503, 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
- azl3 mozjs 102.15.1-1 on Azure Linux 3.0
- cbl2 python-urllib3 1.25.9-3 on CBL Mariner 2.0
- cbl2 python-virtualenv 20.26.6-1 on CBL Mariner 2.0
- cm1 python-urllib3 1.25.9-2 on CBL Mariner 1.0
✅ Updates Microsoft lists: 2 updates
2 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 | 1.25.9-2 |
| — | Security Update | 1.25.9-3 |
🧭 EchelonGraph on CVE-2021-33503
- 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
An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.
Published by MITRE Corporation, the CVE Numbering Authority that assigned CVE-2021-33503, 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).