CVE-2024-8508

mediumpriority · track · 21EPSS 0.008 · 56 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.80% (56th) EPSS

CVSS 5.3 · medium

Is it mine?

44 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

NLnet Labs Unbound up to and including version 1.21.0 contains a vulnerability when handling replies with very large RRsets that it needs to perform name compression for. Malicious upstreams responses with very large RRsets can cause Unbound to spend a considerable time applying name compression to downstream replies. This can lead to degraded performance and eventually denial of service in well orchestrated attacks. The vulnerability can be exploited by a malicious actor querying Unbound for the specially crafted contents of a malicious zone with very large RRsets. Before Unbound replies to the query it will try to apply name compression which was an unbounded operation that could lock the CPU until the whole packet was complete. Unbound version 1.21.1 introduces a hard limit on the number of name compression calculations it is willing to do per packet. Packets that need more compression will result in semi-compressed packets or truncated packets, even on TCP for huge messages, to avoid locking the CPU for long. This change should not affect normal DNS traffic.

cvss

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.15.3mediumAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · FSTEC (BDU) RU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · sep@nlnetlabs.nlexploitability 3.9 · impact 1.4

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1284USprimaryCWE-1284USCWE-400USCWE-606USCWE-606US

affected products (44)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Meinberg LANTIME <7.08.020all versionscert_bundDE
OpenBSD OpenBSD 7.5all versionscert_bundDEcpe:/a:openbsd:openbsd:7.5
OpenBSD OpenBSD 7.6all versionscert_bundDEcpe:/a:openbsd:openbsd:7.6
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat Enterprise Linux 8all versionscert_bundDEcpe:/o:redhat:enterprise_linux:8
Red Hat Enterprise Linux 9all versionscert_bundDEcpe:/o:redhat:enterprise_linux:9
Red Hat OpenShift Container Platform <4.16.30all versionscert_bundDE
Red Hat OpenShift Container Platform <4.17.16all versionscert_bundDE
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
cPanel cPanel/WHM 126.0.63all versionscert_bundDEcpe:/a:cpanel:cpanel_whm:126.0.63
IBM QRadar SIEM< 7.5.0 UP11 IF01cert_bundDE
Meinberg LANTIME< 7.08.020cert_bundDE
Red Hat OpenShift≤ Container Platform <4.17.16cert_bundDE
Red Hat OpenShift≤ Container Platform <4.16.30cert_bundDE
NLnet Labs Unbound≤ 0 ≤1.21.0enisa_euvdEU
Canonical Ltd. Ubuntu≤ 24.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 20.04 LTSfstec_bduRU

showing 20 of 44

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-3169OpenBSD: Schwachstelle ermöglicht Denial of ServiceDeutsch2024-10-14csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in OpenBSD ausnutzen, um einen Denial of Service Angriff durchzuführen.
WID-SEC-W-2024-3710Red Hat Enterprise Linux (unbound und mpg123): Mehrere SchwachstellenDeutsch2024-12-16csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um beliebigen Code auszuführen oder einen Denial-of-Service-Zustand zu erzeugen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2024-10-03modified 2026-06-17

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+503 more

references (8)

External citations — patches, advisories, analysis.

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