CVE-2024-12243

Gnutls: gnutls impacted by inefficient der decoding in libtasn1 leading to remote dos

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

A flaw was found in GnuTLS, which relies on libtasn1 for ASN.1 data processing. Due to an inefficient algorithm in libtasn1, decoding certain DER-encoded certificate data can take excessive time, leading to increased resource consumption. This flaw allows a remote attacker to send a specially crafted certificate, causing GnuTLS to become unresponsive or slow, resulting in a denial-of-service condition.

Bing Shi discovered that GnuTLS incorrectly handled decoding certain DER-encoded certificates. A remote attacker could possibly use this issue to cause GnuTLS to consume resources, leading to a denial of service.

*Credits: Red Hat would like to thank Bing Shi for reporting this issue.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-12-05 CVE Reserved
2025-02-10 CVE Published
2025-06-02 CVE Updated
2025-07-21 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-407: Inefficient Algorithmic Complexity

CAPEC

References (7)

URL	Tag	Source
https://gitlab.com/gnutls/libtasn1/-/issues/52

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2024-12243	2025-02-10
https://bugzilla.redhat.com/show_bug.cgi?id=2344615	2025-02-10
https://access.redhat.com/errata/RHSA-2025:4051	2025-06-02
https://access.redhat.com/errata/RHSA-2025:7076	2025-06-02
https://access.redhat.com/errata/RHSA-2025:8020	2025-06-02
https://access.redhat.com/errata/RHSA-2025:8385	2025-06-02

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Oracle Search vendor "Oracle"		Linux Search vendor "Oracle" for product "Linux"				*		-		Affected
Red Hat Search vendor "Red Hat"		Enterprise Linux Search vendor "Red Hat" for product "Enterprise Linux"				*		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				*		-		Affected
Redhat Search vendor "Redhat"		Openshift Search vendor "Redhat" for product "Openshift"				*		-		Affected
Redhat Search vendor "Redhat"		Rhel Eus Search vendor "Redhat" for product "Rhel Eus"				*		-		Affected
F5 Search vendor "F5"		Big-ip Search vendor "F5" for product "Big-ip"				*		-		Affected
Alma Search vendor "Alma"		Linux Search vendor "Alma" for product "Linux"				*		-		Affected
Amazon Search vendor "Amazon"		Linux Search vendor "Amazon" for product "Linux"				*		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				*		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				*		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				*		-		Affected
Huawei Search vendor "Huawei"		Euleros Search vendor "Huawei" for product "Euleros"				*		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				*		-		Affected
Oracle Search vendor "Oracle"		Linux Search vendor "Oracle" for product "Linux"				*		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				*		-		Affected
Redhat Search vendor "Redhat"		Rhel Eus Search vendor "Redhat" for product "Rhel Eus"				*		-		Affected
Siemens Search vendor "Siemens"		Simatic S7-1500 Cpu 1518-4 Pn/dp Mfp Firmware Search vendor "Siemens" for product "Simatic S7-1500 Cpu 1518-4 Pn/dp Mfp Firmware"				*		-		Affected
Siemens Search vendor "Siemens"		Simatic S7-1500 Cpu 1518f-4 Pn/dp Mfp Firmware Search vendor "Siemens" for product "Simatic S7-1500 Cpu 1518f-4 Pn/dp Mfp Firmware"				*		-		Affected
Siemens Search vendor "Siemens"		Siplus S7-1500 Cpu 1518-4 Pn/dp Mfp Firmware Search vendor "Siemens" for product "Siplus S7-1500 Cpu 1518-4 Pn/dp Mfp Firmware"				*		-		Affected
Slackware Search vendor "Slackware"		Slackware Linux Search vendor "Slackware" for product "Slackware Linux"				*		-		Affected
Suse Search vendor "Suse"		Sle-module-basesystem Search vendor "Suse" for product "Sle-module-basesystem"				*		-		Affected