CVE-2021-21240 — Regular Expression Denial of Service in httplib2
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 "ww…
Published: 2021-02-08 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7