CVE-2021-21240 log

Source	CVE Red Hat MITRE NVD Debian Ubuntu SUSE Alpine Mageia CVE Details CIRCL Bugs Arch Linux Red Hat Gentoo SUSE GitHub Lists oss-security full-disclosure bugtraq Misc GitHub code web search
Severity	Medium
Remote	Yes
Type	Denial of service
Description	In python-httplib2 before version 0.19.0, a malicious server which responds with a 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.

Group	Package	Affected	Fixed	Severity	Status	Ticket
AVG-1546	python-httplib2	0.18.1-4	0.19.0-1	Medium	Fixed

Date	Advisory	Group	Package	Severity	Type
27 Feb 2021	ASA-202102-35	AVG-1546	python-httplib2	Medium	denial of service

References
https://github.com/httplib2/httplib2/security/advisories/GHSA-93xj-8mrv-444m https://github.com/httplib2/httplib2/pull/182 https://github.com/httplib2/httplib2/commit/bd9ee252c8f099608019709e22c0d705e98d26bc

References

https://github.com/httplib2/httplib2/security/advisories/GHSA-93xj-8mrv-444m
https://github.com/httplib2/httplib2/pull/182
https://github.com/httplib2/httplib2/commit/bd9ee252c8f099608019709e22c0d705e98d26bc

Notes
Workaround ========== The issue can be mitigated by using "httplib2.USE_WWW_AUTH_STRICT_PARSING = True".