CVE-2019-10190
Published: 10 July 2019
A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.
Notes
| Author | Note |
|---|---|
| alexmurray | According to the advisory only affects version between (and including) 3.2.0 and 4.0.0 so only disco + eoan affected |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
knot-resolver Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
| cosmic |
Not vulnerable
|
|
| 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)
|
|
| jammy |
Not vulnerable
(5.4.4-1)
|
|
| kinetic |
Not vulnerable
(5.5.1-5)
|
|
| lunar |
Not vulnerable
(5.6.0-1)
|
|
| mantic |
Not vulnerable
(5.6.0-1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.1.0)
|
|
| xenial |
Not vulnerable
|
|
|
Patches: upstream: https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/827/commits |
||
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 | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |