CVE-2019-16201
Published: 20 November 2019
WEBrick::HTTPAuth::DigestAuth in Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 has a regular expression Denial of Service cause by looping/backtracking. A victim must expose a WEBrick server that uses DigestAuth to the Internet or a untrusted network.
From the Ubuntu Security Team
It was discovered that WEBrick as provided by JRuby was vulnerable to a denial of service attack due to catastrophic backtracking in certain regular expressions. An attacker could use this vulnerability to cause JRuby to consume system resources.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
jruby Launchpad, Ubuntu, Debian |
bionic |
Needed
|
| disco |
Ignored
(end of life)
|
|
| eoan |
Ignored
(end of life)
|
|
| focal |
Needed
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Ignored
(end of life)
|
|
| lunar |
Ignored
(end of life, was needs-triage)
|
|
| mantic |
Needs triage
|
|
| trusty |
Released
(1.5.6-9+deb8u2build0.14.04.1~esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Needs triage
|
|
| xenial |
Needed
|
|
|
ruby2.3 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| disco |
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
|
|
| mantic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Released
(2.3.1-2~ubuntu16.04.14)
|
|
|
ruby2.5 Launchpad, Ubuntu, Debian |
bionic |
Released
(2.5.1-1ubuntu1.6)
|
| disco |
Released
(2.5.5-1ubuntu1.1)
|
|
| eoan |
Released
(2.5.5-4ubuntu2.1)
|
|
| 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
|
|
| mantic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(2.5.7-1)
|
|
| xenial |
Does not exist
|
|
|
Patches: upstream: https://github.com/ruby/ruby/commit/36e057e26ef2104bc2349799d6c52d22bb1c7d03 upstream: https://github.com/ruby/ruby/commit/05cdcdc6ec7f0777ba56100308e54e97e277293f |
||
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 |