CVE-2020-19861
Published: 21 January 2022
When a zone file in ldns 1.7.1 is parsed, the function ldns_nsec3_salt_data is too trusted for the length value obtained from the zone file. When the memcpy is copied, the 0xfe - ldns_rdf_size(salt_rdf) byte data can be copied, causing heap overflow information leakage.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
ldns Launchpad, Ubuntu, Debian |
bionic |
Released
(1.7.0-3ubuntu4.1)
|
| focal |
Released
(1.7.0-4.1ubuntu1+esm1)
Available with Ubuntu Pro |
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Released
(1.7.1-2ubuntu4+esm1)
Available with Ubuntu Pro |
|
| kinetic |
Ignored
(end of life, was needed)
|
|
| lunar |
Not vulnerable
(1.8.1-1)
|
|
| mantic |
Not vulnerable
(1.8.1-1)
|
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Released
(1.8.0)
|
|
| xenial |
Released
(1.6.17-8ubuntu0.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |