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
Medium
CVSS 3 base score: 7.5
Status
| Package | Release | Status |
|---|---|---|
|
ldns Launchpad, Ubuntu, Debian |
bionic |
Released
(1.7.0-3ubuntu4.1)
|
| focal |
Released
(1.7.0-4.1ubuntu1+esm1)
|
|
| impish |
Ignored
(reached end-of-life)
|
|
| jammy |
Released
(1.7.1-2ubuntu4+esm1)
|
|
| kinetic |
Needed
|
|
| trusty |
Ignored
(out of standard support)
|
|
| upstream |
Released
(1.8.0)
|
|
| xenial |
Released
(1.6.17-8ubuntu0.1+esm1)
|
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-19861
- https://github.com/NLnetLabs/ldns/issues/51
- https://github.com/NLnetLabs/ldns/commit/136ec420437041fe13f344a2053e774f9050cc38
- https://ubuntu.com/security/notices/USN-5257-1
- https://ubuntu.com/security/notices/USN-5257-2
- NVD
- Launchpad
- Debian