CVE-2021-21240
CVSS V2 Medium 5
CVSS V3 High 7.5
Description
httplib2 is a comprehensive HTTP client library for Python. In httplib2 before version 0.19.0, a malicious server which responds with long series of "\xa0" characters in the "www-authenticate" header may cause Denial of Service (CPU burn while parsing header) of the httplib2 client accessing said server. This is fixed in version 0.19.0 which contains a new implementation of auth headers parsing using the pyparsing library.
Overview
- CVE ID
- CVE-2021-21240
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-02-08T20:15:12
- Last Modified Date
- 2021-02-12T14:56:39
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:httplib2_project:httplib2:*:*:*:*:*:python:*:* | 1 | OR | 0.19.0 |
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/httplib2/httplib2/commit/bd9ee252c8f099608019709e22c0d705e98d26bc | Patch Third Party Advisory |
| https://github.com/httplib2/httplib2/pull/182 | Patch Third Party Advisory |
| https://github.com/httplib2/httplib2/security/advisories/GHSA-93xj-8mrv-444m | Exploit Mitigation Third Party Advisory |
| https://pypi.org/project/httplib2 | Product Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-21240 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21240 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:23:29 | Added to TrackCVE | |||
| 2022-12-05 21:34:46 | 2021-02-08T20:15Z | 2021-02-08T20:15:12 | CVE Published Date | updated |
| 2022-12-05 21:34:46 | 2021-02-12T14:56:39 | CVE Modified Date | updated | |
| 2022-12-05 21:34:46 | Analyzed | Vulnerability Status | updated |