CVE-2021-3672
Published: 10 August 2021
A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
c-ares Launchpad, Ubuntu, Debian |
bionic |
Released
(1.14.0-1ubuntu0.1)
|
| focal |
Released
(1.15.0-1ubuntu0.1)
|
|
| hirsute |
Released
(1.17.1-1ubuntu0.1)
|
|
| impish |
Released
(1.17.1-1ubuntu1)
|
|
| jammy |
Released
(1.17.1-1ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(1.17.2)
|
|
| xenial |
Released
(1.10.0-3ubuntu0.2+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
|
Patches: upstream: https://github.com/c-ares/c-ares/commit/362f91d upstream: https://github.com/c-ares/c-ares/commit/44c009b |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.6 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L |