CVE-2019-18978
Published: 14 November 2019
An issue was discovered in the rack-cors (aka Rack CORS Middleware) gem before 1.0.4 for Ruby. It allows ../ directory traversal to access private resources because resource matching does not ensure that pathnames are in a canonical format.
From the Ubuntu Security Team
It was discovered that rack-cors did not properly handle relative file paths. An attacker could use this vulnerability to access arbitrary files.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
ruby-rack-cors Launchpad, Ubuntu, Debian |
bionic |
Needed
|
| disco |
Ignored
(end of life)
|
|
| eoan |
Ignored
(end of life)
|
|
| focal |
Not vulnerable
(1.1.1-1)
|
|
| groovy |
Not vulnerable
(1.1.1-1)
|
|
| hirsute |
Not vulnerable
(1.1.1-1)
|
|
| impish |
Not vulnerable
(1.1.1-1)
|
|
| jammy |
Not vulnerable
(1.1.1-1)
|
|
| kinetic |
Not vulnerable
(1.1.1-1)
|
|
| lunar |
Not vulnerable
(1.1.1-1)
|
|
| mantic |
Not vulnerable
(1.1.1-1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Released
(0.4.0-1+deb9u2build0.16.04.1)
|
|
|
Patches: upstream: https://github.com/cyu/rack-cors/commit/e4d4fc362a4315808927011cbe5afcfe5486f17d |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |