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CVE

CWE

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CVE-2021-21240

Published: Feb 8, 2021

Modified: Aug 3, 2024

PUBLISHED

CVSS v3.1

7.5

HIGH

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.

Vendor	Product	Versions
httplib2	httplib2	affected `< 0.19.0`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

https://github.com/httplib2/httplib2/security/advisories/GHSA-93xj-8mrv-444m

x_refsource_CONFIRM

https://github.com/httplib2/httplib2/pull/182

x_refsource_MISC

https://github.com/httplib2/httplib2/commit/bd9ee252c8f099608019709e22c0d705e98d26bc

x_refsource_MISC

https://pypi.org/project/httplib2

x_refsource_MISC

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