5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.004 Low
EPSS
Percentile
72.6%
Severity: Medium
Date : 2021-02-27
CVE-ID : CVE-2021-21240
Package : python-httplib2
Type : denial of service
Remote : Yes
Link : https://security.archlinux.org/AVG-1546
The package python-httplib2 before version 0.19.0-1 is vulnerable to
denial of service.
Upgrade to 0.19.0-1.
The problem has been fixed upstream in version 0.19.0.
The issue can be mitigated by using
“httplib2.USE_WWW_AUTH_STRICT_PARSING = True”.
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.
A malicious server can crash the application with crafted HTTP
responses.
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
https://security.archlinux.org/CVE-2021-21240
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ArchLinux | any | any | python-httplib2 | < 0.19.0-1 | UNKNOWN |
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.004 Low
EPSS
Percentile
72.6%