CVE-2021-33503
CVSS V2 Medium 5
CVSS V3 High 7.5
Description
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.
Overview
- CVE ID
- CVE-2021-33503
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-06-29T11:15:07
- Last Modified Date
- 2023-01-24T19:35:56
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:python:urllib3:*:*:*:*:*:*:*:* | 1 | OR | 1.26.5 | |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 7.5
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/advisories/GHSA-q2q7-5pp4-w6pg | Third Party Advisory |
| https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec | Patch Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FMUGWEAUYGGHTPPXT6YBD53WYXQGVV73/ | Mailing List Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6SCV7ZNAHS3E6PBFLJGENCDRDRWRZZ6W/ | Mailing List Third Party Advisory |
| https://security.gentoo.org/glsa/202107-36 | Third Party Advisory |
| https://www.oracle.com/security-alerts/cpuoct2021.html | Patch Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-33503 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33503 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:42:39 | Added to TrackCVE | |||
| 2022-12-05 05:08:52 | 2021-06-29T11:15Z | 2021-06-29T11:15:07 | CVE Published Date | updated |
| 2022-12-05 05:08:52 | 2021-12-08T20:34:40 | CVE Modified Date | updated | |
| 2022-12-05 05:08:52 | Analyzed | Vulnerability Status | updated | |
| 2023-01-24 19:11:20 | Analyzed | Undergoing Analysis | Vulnerability Status | updated |
| 2023-01-24 21:11:59 | 2023-01-24T19:35:56 | CVE Modified Date | updated | |
| 2023-01-24 21:11:59 | Undergoing Analysis | Analyzed | Vulnerability Status | updated |