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

Quick assessment

Affected

CVE-2024-12133

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

libtasn1是gnutls开源的一个小型的 ASN.1 库。 libtasn1存在安全漏洞，该漏洞源于在处理证书中的大量元素时，所花的时间比预期的要长得多，这可能会导致系统变慢甚至崩溃。

CVSS 5.3 · Medium EPSS 1.11% · P66 Updated Oct 23, 2026

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 25

Vendor	Product	Version Range	Status
None	None	`< 4.20.0`	affected
Red Hat	Red Hat Discovery 1.14	`1.14.3-1748529279< *`	unaffected
		`1.14.2-1748467619< *`	unaffected
Red Hat	Red Hat Enterprise Linux 10	`any`	unaffected
Red Hat	Red Hat Enterprise Linux 6	`any`	unknown
Red Hat	Red Hat Enterprise Linux 7	`any`	unknown
Red Hat	Red Hat Enterprise Linux 8	`0:4.13-5.el8_10< *`	unaffected
		`0:4.13-5.el8_10< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	`0:3.6.14-10.el8_4.1< *`	unaffected
		`0:4.13-3.el8_4.1< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	`0:3.6.14-10.el8_4.1< *`	unaffected
		`0:4.13-3.el8_4.1< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	`0:3.6.16-5.el8_6.5< *`	unaffected
		`0:4.13-3.el8_6.2< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	`0:3.6.16-5.el8_6.5< *`	unaffected
		`0:4.13-3.el8_6.2< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	`0:3.6.16-7.el8_8.4< *`	unaffected
		`0:4.13-4.el8_8.1< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	`0:3.6.16-7.el8_8.4< *`	unaffected
		`0:4.13-4.el8_8.1< *`	unaffected
Red Hat	Red Hat Enterprise Linux 9	`0:4.16.0-9.el9< *`	unaffected
		`0:4.16.0-9.el9< *`	unaffected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	`0:4.16.0-8.el9_2.1< *`	unaffected
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support	`0:4.16.0-8.el9_4.1< *`	unaffected
Red Hat	Red Hat OpenShift Container Platform 4	`any`	affected

I. Basic Information for CVE-2024-12133

Vulnerability Information

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Vulnerability Title

Libtasn1: inefficient der decoding in libtasn1 leading to potential remote dos

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Source: CVE Program / CVE List V5

Vulnerability Type

算法复杂性

Source: CVE Program / CVE List V5

Vulnerability Title

libtasn1 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE
-	-	0 ~ 4.20.0	-
Red Hat	Red Hat Enterprise Linux 8	0:4.13-5.el8_10 ~ *	`cpe:/a:redhat:enterprise_linux:8::appstream`
Red Hat	Red Hat Enterprise Linux 8	0:4.13-5.el8_10 ~ *	`cpe:/a:redhat:enterprise_linux:8::appstream`
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	0:3.6.14-10.el8_4.1 ~ *	`cpe:/a:redhat:rhel_aus:8.4::appstream`
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	0:4.13-3.el8_4.1 ~ *	`cpe:/a:redhat:rhel_aus:8.4::appstream`
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	0:3.6.14-10.el8_4.1 ~ *	`cpe:/a:redhat:rhel_aus:8.4::appstream`
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	0:4.13-3.el8_4.1 ~ *	`cpe:/a:redhat:rhel_aus:8.4::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	0:3.6.16-5.el8_6.5 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	0:4.13-3.el8_6.2 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	0:3.6.16-5.el8_6.5 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	0:4.13-3.el8_6.2 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	0:3.6.16-7.el8_8.4 ~ *	`cpe:/a:redhat:rhel_e4s:8.8::appstream`
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	0:4.13-4.el8_8.1 ~ *	`cpe:/a:redhat:rhel_e4s:8.8::appstream`
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	0:3.6.16-7.el8_8.4 ~ *	`cpe:/a:redhat:rhel_e4s:8.8::appstream`
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	0:4.13-4.el8_8.1 ~ *	`cpe:/a:redhat:rhel_e4s:8.8::appstream`
Red Hat	Red Hat Enterprise Linux 9	0:4.16.0-9.el9 ~ *	`cpe:/a:redhat:enterprise_linux:9::appstream`
Red Hat	Red Hat Enterprise Linux 9	0:4.16.0-9.el9 ~ *	`cpe:/a:redhat:enterprise_linux:9::appstream`
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	0:4.16.0-8.el9_2.1 ~ *	`cpe:/a:redhat:rhel_e4s:9.2::appstream`
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support	0:4.16.0-8.el9_4.1 ~ *	`cpe:/a:redhat:rhel_eus:9.4::appstream`
Red Hat	Red Hat Discovery 1.14	1.14.3-1748529279 ~ *	`cpe:/a:redhat:discovery:1.14::el9`
Red Hat	Red Hat Discovery 1.14	1.14.2-1748467619 ~ *	`cpe:/a:redhat:discovery:1.14::el9`
Red Hat	Red Hat Enterprise Linux 10	-	`cpe:/o:redhat:enterprise_linux:10`
Red Hat	Red Hat Enterprise Linux 6	-	`cpe:/o:redhat:enterprise_linux:6`
Red Hat	Red Hat Enterprise Linux 7	-	`cpe:/o:redhat:enterprise_linux:7`
Red Hat	Red Hat OpenShift Container Platform 4	-	`cpe:/a:redhat:openshift:4`

II. Public POCs for CVE-2024-12133

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2024-12133

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Vendor Advisories for CVE-2024-12133 (10)

Parsing a certificate containing numerous names or name constraints leads to a DoS attack (#52) · Issues · gnutls / libtasn1 · GitLab
CVE-2024-12133 - Red Hat Customer Portal vdb-entry x_refsource_REDHAT
doc/security/CVE-2024-12133.md · master · gnutls / libtasn1 · GitLab
2344611 – (CVE-2024-12133) CVE-2024-12133 libtasn1: Inefficient DER Decoding in libtasn1 Leading to Potential Remote DoS issue-tracking x_refsource_REDHAT
RHSA-2025:4049 - Security Advisory - Red Hat Customer Portal vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:8021 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2026:30850 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2026:30849 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2026:33125 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
RHSA-2025:17347 - Security Advisory - Red Hat Customer Portal vendor-advisory x_refsource_REDHAT

https://www.cve.org/CVERecord?id=CVE-2024-12133

IV. Related Vulnerabilities

Same weakness: CWE-407