CVE-2020-8492
Published: 30 January 2020
Python 2.7 through 2.7.17, 3.5 through 3.5.9, 3.6 through 3.6.10, 3.7 through 3.7.6, and 3.8 through 3.8.1 allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client because of urllib.request.AbstractBasicAuthHandler catastrophic backtracking.
Priority
Status
Package | Release | Status |
---|---|---|
python2.7 Launchpad, Ubuntu, Debian |
bionic |
Released
(2.7.17-1~18.04ubuntu1)
|
eoan |
Ignored
(reached end-of-life)
|
|
focal |
Released
(2.7.18-1~20.04.1)
|
|
groovy |
Ignored
(reached end-of-life)
|
|
hirsute |
Ignored
(reached end-of-life)
|
|
impish |
Ignored
(reached end-of-life)
|
|
jammy |
Not vulnerable
(2.7.18-13ubuntu1)
|
|
kinetic |
Not vulnerable
(2.7.18-13ubuntu1)
|
|
lunar |
Does not exist
|
|
trusty |
Released
(2.7.6-8ubuntu0.6+esm5)
|
|
upstream |
Needs triage
|
|
xenial |
Released
(2.7.12-1ubuntu0~16.04.11)
|
|
python3.4 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Released
(3.4.3-1ubuntu1~14.04.7+esm6)
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
python3.5 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Needed
|
|
upstream |
Needs triage
|
|
xenial |
Released
(3.5.2-2ubuntu0~16.04.10)
|
|
python3.6 Launchpad, Ubuntu, Debian |
bionic |
Released
(3.6.9-1~18.04ubuntu1)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
Patches: upstream: https://github.com/python/cpython/commit/69cdeeb93e0830004a495ed854022425b93b3f3e |
||
python3.7 Launchpad, Ubuntu, Debian |
bionic |
Released
(3.7.5-2ubuntu1~18.04.2)
|
eoan |
Released
(3.7.5-2~19.10ubuntu1)
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
Patches: upstream: https://github.com/python/cpython/commit/b57a73694e26e8b2391731b5ee0b1be59437388e |
||
python3.8 Launchpad, Ubuntu, Debian |
bionic |
Released
(3.8.0-3ubuntu1~18.04.2)
|
eoan |
Ignored
(reached end-of-life)
|
|
focal |
Released
(3.8.2-1ubuntu1.1)
|
|
groovy |
Released
(3.8.2-1ubuntu1.1)
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
Patches: upstream: https://github.com/python/cpython/commit/ea9e240aa02372440be8024acb110371f69c9d41 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8492
- https://github.com/python/cpython/pull/18284
- https://python-security.readthedocs.io/vuln/urllib-basic-auth-regex.html
- https://github.com/python/cpython/commit/0b297d4ff1c0e4480ad33acae793fbaf4bf015b4
- https://ubuntu.com/security/notices/USN-4333-1
- https://ubuntu.com/security/notices/USN-4333-2
- https://ubuntu.com/security/notices/USN-4754-3
- https://ubuntu.com/security/notices/USN-5200-1
- NVD
- Launchpad
- Debian