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 |