CVE-2021-21240

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.

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
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

Configurations

Configuration 1 (hide)

cpe:2.3:a:httplib2_project:httplib2:*:*:*:*:*:python:*:*

History

No history.

Information

Published : 2021-02-08 20:15

Updated : 2024-02-28 18:08

NVD link : CVE-2021-21240

Mitre link : CVE-2021-21240

CVE.ORG link : CVE-2021-21240

JSON object : View

Products Affected

httplib2_project

httplib2

CWE

CWE-400

Uncontrolled Resource Consumption

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