CVE-2024-12133 | Libtasn1: inefficient der decoding in libtasn1 leading to potential remote dos

A flaw in libtasn1 causes inefficient handling of specific certificate data. When processing a large number of elements in a certificate, libtasn1 takes much longer than expected, which can slow down or even crash the system. This flaw allows an attacker to send a specially crafted certificate, causing a denial of service attack.

Published: 2025-02-10 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-12133 is rated Moderate Risk (42.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.03%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-12133

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.34% 1.03% +0.68%
2 2026-06-02 0.35% 0.34% -0.01%
3 2026-05-22 — 0.35% —

Full EPSS history (26 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-12133

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2024-12133

GitHub Security Advisory for CVE-2024-12133

GHSA-j3qr-8f3v-fgjj · Severity: medium — A flaw in libtasn1 causes inefficient handling of specific certificate data. When processing a...

OS Trackers for CVE-2024-12133

vendor priority summary link
alpine — CVE-2024-12133: 1 source package rows (libtasn1); 7 state rows across 7 repos (3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, 3.23-main, edge-main); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2024-12133
debian not yet assigned CVE-2024-12133 not yet assigned priority: Debian including 1 source packages (libtasn1-6), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-12133
redhat medium — https://access.redhat.com/security/cve/CVE-2024-12133
suse high CVE-2024-12133 severity important: SUSE including 374 source package names (0.0.17-1.1:libtasn1-4.13-150000.4.11.1, 0.0.17-1.1:libtasn1-6-4.13-150000.4.11.1, …), 1060 product×package rows across 393 product lines (Container bci/kiwi, Container bci/openjdk, … (393 product lines)): Fixed 839, Known Affected 221. https://www.suse.com/security/cve/CVE-2024-12133/
ubuntu medium CVE-2024-12133 medium priority: Ubuntu including 1 source packages (libtasn1-6), 10 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): released 5, needs-triage 3, not-affected 2. https://ubuntu.com/security/CVE-2024-12133

Affected software / configurations for CVE-2024-12133

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2024-12133

cvelogic Threat Intelligence