CVE-2021-21240
Published: 8 February 2021
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | patch will introduce dependency on the pyparsing package |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
python-httplib2 Launchpad, Ubuntu, Debian |
bionic |
Needed
|
| focal |
Needed
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Needed
|
|
| kinetic |
Ignored
(end of life, was needed)
|
|
| lunar |
Not vulnerable
(0.20.4-2)
|
|
| mantic |
Not vulnerable
(0.20.4-2)
|
|
| noble |
Not vulnerable
(0.20.4-2)
|
|
| trusty |
Needed
|
|
| upstream |
Released
(0.19.0)
|
|
| xenial |
Needed
|
|
|
Patches: upstream: https://github.com/httplib2/httplib2/commit/bd9ee252c8f099608019709e22c0d705e98d26bc |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |