CVE catalog
CVE-2020-10030
pdns-recursor: CVE-2020-10030
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 23.89% · Oct 25, 2026
An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system's hostname) to cause disclosure of uninitialized memory content via a stack-based out-of-bounds read. It only occurs on systems where gethostname() does not have '\0' termination of the returned string if the hostname is larger than the supplied buffer. (Linux systems are not affected because the buffer is always large enough. OpenBSD systems are not affected because the returned hostname always has '\0' termination.) Under some conditions, this issue can lead to the writing of one '\0' byte out-of-bounds on the stack, causing a denial of service or possibly arbitrary code execution.
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 | pdns-recursor | sid | 5.4.9-1 | fixed |
| Debian | pdns-recursor | forky | 5.4.8-1 | fixed |
| Debian | pdns-recursor | trixie | 5.2.13-0+deb13u1 | fixed |
| Debian | pdns-recursor | trixie-security | 5.2.13-0+deb13u1 | fixed |
| Debian | pdns-recursor | bookworm | 4.8.8-1+deb12u1 | fixed |
| Debian | pdns-recursor | bookworm-security | 4.8.8-1+deb12u1 | fixed |
| Suse | pdns-recursor | package hub 12 sp1 | 4.1.12-bp151.4.3.1 | fixed |
| Suse | pdns-recursor | package hub 15 sp1 | 4.1.12-bp151.4.3.1 | fixed |
| Opensuse | pdns-recursor | leap 15.1 | 4.1.12-bp151.4.3.1 | fixed |
| Ubuntu | pdns-recursor | pro | 4.2.0-6 | vulnerable |
| Ubuntu | pdns-recursor | pro | 4.2.1-1 | vulnerable |
| Ubuntu | pdns-recursor | pro | 4.2.1-1build1 | vulnerable |
| Ubuntu | pdns-recursor | pro | 4.2.1-1build2 | vulnerable |
| Ubuntu | pdns-recursor | pro | 4.2.1-1ubuntu0.1~esm1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | pdns-recursor | source | sid | 4.3.1-1 | unimportant | Not reported | Not reported |
| Debian | pdns-recursor | source | forky | 4.3.1-1 | unimportant | Not reported | Not reported |
| Debian | pdns-recursor | source | trixie | 4.3.1-1 | unimportant | Not reported | Not reported |
| Debian | pdns-recursor | source | bookworm | 4.3.1-1 | unimportant | Not reported | Not reported |
| Suse | pdns-recursor | rpm | package hub 12 sp1 | 4.1.12-bp151.4.3.1 | Not reported | OPENSUSE-SU-2020:0698-1 | Not reported |
| Suse | pdns-recursor | rpm | package hub 15 sp1 | 4.1.12-bp151.4.3.1 | Not reported | OPENSUSE-SU-2020:0698-1 | Not reported |
| Opensuse | pdns-recursor | rpm | leap 15.1 | 4.1.12-bp151.4.3.1 | Not reported | OPENSUSE-SU-2020:0698-1 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [pdns-recursor]Unknown
Details (4)
4.8.8-1+deb12u1· amd64 · bookwormFixed · Fixed:
4.3.1-1dsa · pdns-recursor · debian · bookworm; dsa · pdns-recursor · debian · 12
4.8.8-1+deb12u1· arm64 · bookwormFixed · Fixed:
4.3.1-1dsa · pdns-recursor · debian · bookworm; dsa · pdns-recursor · debian · 12
4.8.8-1+deb12u1· amd64 · bookworm-securityFixed · Fixed:
4.3.1-1dsa · pdns-recursor · debian · bookworm; dsa · pdns-recursor · debian · 12
4.8.8-1+deb12u1· arm64 · bookworm-securityFixed · Fixed:
4.3.1-1dsa · pdns-recursor · debian · bookworm; dsa · pdns-recursor · debian · 12
[Debian 13 (Trixie)]
- [pdns-recursor]Unknown
Details (4)
5.2.11-0+deb13u1· amd64 · trixieFixed · Fixed:
4.3.1-1dsa · pdns-recursor · debian · 13
5.2.11-0+deb13u1· arm64 · trixieFixed · Fixed:
4.3.1-1dsa · pdns-recursor · debian · 13
5.2.13-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
4.3.1-1dsa · pdns-recursor · debian · 13
5.2.13-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
4.3.1-1dsa · pdns-recursor · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2020_0698-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-10030]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-10030]
- [https://osv.dev/vulnerability/openSUSE-SU-2020:0698-1]
- [https://security-tracker.debian.org/tracker/CVE-2020-10030]
- [https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-10030.json]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]