CVE catalog
CVE-2020-19861
ldns: CVE-2020-19861
- Severity
- Medium · CVSS 5.3
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.49% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | ldns | sid | 1.9.2-1 | fixed |
| Debian | ldns | forky | 1.9.2-1 | fixed |
| Debian | ldns | trixie | 1.8.4-2 | fixed |
| Debian | ldns | bookworm | 1.8.3-1 | fixed |
| Ubuntu | ldns | pro | 1.7.1-2build1 | vulnerable |
| Ubuntu | ldns | pro | 1.7.1-2ubuntu1 | vulnerable |
| Ubuntu | ldns | pro | 1.7.1-2ubuntu3 | vulnerable |
| Ubuntu | ldns | pro | 1.7.1-2ubuntu4 | vulnerable |
| Ubuntu | ldns | pro | 1.7.1-2ubuntu4+esm1 | fixed |
| Ubuntu | ldns | 18.04 | 1.7.0-1ubuntu1 | vulnerable |
| Ubuntu | ldns | 18.04 | 1.7.0-3ubuntu1 | vulnerable |
| Ubuntu | ldns | 18.04 | 1.7.0-3ubuntu2 | vulnerable |
| Ubuntu | ldns | 18.04 | 1.7.0-3ubuntu4 | vulnerable |
| Ubuntu | ldns | 18.04 | 1.7.0-3ubuntu4.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | ldns | source | sid | 1.8.1-1 | not yet assigned | Not reported | Not reported |
| Debian | ldns | source | forky | 1.8.1-1 | not yet assigned | Not reported | Not reported |
| Debian | ldns | source | trixie | 1.8.1-1 | not yet assigned | Not reported | Not reported |
| Debian | ldns | source | bookworm | 1.8.1-1 | not yet assigned | Not reported | Not reported |
| Ubuntu | ldns | deb | pro | 1.7.1-2ubuntu4+esm1 | Not reported | UBUNTU-CVE-2020-19861 | Not reported |
| Ubuntu | ldns | deb | 18.04 | 1.7.0-3ubuntu4.1 | Not reported | UBUNTU-CVE-2020-19861 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [ldnsutils]Fixed
Source package: [ldns]
Details (2)
1.8.3-1+b1· amd64 · bookwormFixed · Fixed:
1.8.1-1dsa · ldns · debian · bookworm; dsa · ldns · debian · 12
1.8.3-1+b1· arm64 · bookwormFixed · Fixed:
1.8.1-1dsa · ldns · debian · bookworm; dsa · ldns · debian · 12
- [libldns3]Fixed
Source package: [ldns]
Details (2)
1.8.3-1+b1· amd64 · bookwormFixed · Fixed:
1.8.1-1dsa · ldns · debian · bookworm; dsa · ldns · debian · 12
1.8.3-1+b1· arm64 · bookwormFixed · Fixed:
1.8.1-1dsa · ldns · debian · bookworm; dsa · ldns · debian · 12
- [libldns-dev]Fixed
Source package: [ldns]
Details (2)
1.8.3-1+b1· amd64 · bookwormFixed · Fixed:
1.8.1-1dsa · ldns · debian · bookworm; dsa · ldns · debian · 12
1.8.3-1+b1· arm64 · bookwormFixed · Fixed:
1.8.1-1dsa · ldns · debian · bookworm; dsa · ldns · debian · 12
- [python3-ldns]Fixed
Source package: [ldns]
Details (2)
1.8.3-1+b1· amd64 · bookwormFixed · Fixed:
1.8.1-1dsa · ldns · debian · bookworm; dsa · ldns · debian · 12
1.8.3-1+b1· arm64 · bookwormFixed · Fixed:
1.8.1-1dsa · ldns · debian · bookworm; dsa · ldns · debian · 12
[Debian 13 (Trixie)]
- [ldnsutils]Fixed
Source package: [ldns]
Details (2)
1.8.4-2+b1· amd64 · trixieFixed · Fixed:
1.8.1-1dsa · ldns · debian · 13
1.8.4-2+b1· arm64 · trixieFixed · Fixed:
1.8.1-1dsa · ldns · debian · 13
- [libldns3t64]Fixed
Source package: [ldns]
Details (2)
1.8.4-2+b1· amd64 · trixieFixed · Fixed:
1.8.1-1dsa · ldns · debian · 13
1.8.4-2+b1· arm64 · trixieFixed · Fixed:
1.8.1-1dsa · ldns · debian · 13
- [libldns-dev]Fixed
Source package: [ldns]
Details (2)
1.8.4-2+b1· amd64 · trixieFixed · Fixed:
1.8.1-1dsa · ldns · debian · 13
1.8.4-2+b1· arm64 · trixieFixed · Fixed:
1.8.1-1dsa · ldns · debian · 13
- [python3-ldns]Fixed
Source package: [ldns]
Details (2)
1.8.4-2+b1· amd64 · trixieFixed · Fixed:
1.8.1-1dsa · ldns · debian · 13
1.8.4-2+b1· arm64 · trixieFixed · Fixed:
1.8.1-1dsa · ldns · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2022_0675-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-19861]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-19861]
- [https://security-tracker.debian.org/tracker/CVE-2020-19861]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]