CVE-2023-31130
Published: 25 May 2023
c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for certain ipv6 addresses, in particular "0::00:00:00/2" was found to cause an issue. C-ares only uses this function internally for configuration purposes which would require an administrator to configure such an address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
c-ares Launchpad, Ubuntu, Debian |
bionic |
Released
(1.14.0-1ubuntu0.2+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
| focal |
Released
(1.15.0-1ubuntu0.3)
|
|
| jammy |
Released
(1.18.1-1ubuntu0.22.04.2)
|
|
| kinetic |
Released
(1.18.1-1ubuntu0.22.10.2)
|
|
| lunar |
Released
(1.18.1-2ubuntu0.1)
|
|
| mantic |
Not vulnerable
(1.18.1-3)
|
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Released
(1.19.1,1.18.1-3)
|
|
| xenial |
Released
(1.10.0-3ubuntu0.2+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
|
Patches: upstream: https://github.com/c-ares/c-ares/commit/f22cc01039b6473b736d3bf438f56a2654cdf2b2 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.4 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | High |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H |