Resource exhaustion in Diffie-Hellman key exchange - CVE-2024-41996

Vulnerability identifier: #VU98050

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2024-41996

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to unnecessary validation of the public keys in the Diffie-Hellman Key Agreement Protocol when an approved safe prime is used. A remote attacker from the client side can trigger unnecessarily expensive server-side DHE modular-exponentiation calculations and cause asymmetric resource consumption, resulting in a denial of service (DoS) attack.

Diffie-Hellman key exchange
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Server 15 SP4 LTSS
SUSE Linux Enterprise Desktop 15 SP4 LTSS
Basesystem Module
openSUSE Leap
Ubuntu
openEuler
IQ Engine
APEX Cloud Platform for Microsoft Azure
Guardium Data Security Center (GDSC)
BIG-IP
libopenssl3-64bit-debuginfo
openssl-3
openssl-3-debugsource
libopenssl-3-devel
openssl-3-debuginfo
libopenssl3
libopenssl3-debuginfo
libopenssl3-32bit
libopenssl-3-devel-32bit
libopenssl3-32bit-debuginfo
openssl-3-doc
libopenssl3-64bit
libopenssl-3-devel-64bit
openssl
openssl-debuginfo
openssl-debugsource
openssl-devel
openssl-libs
openssl-perl
openssl-help
libopenssl-3-fips-provider-64bit
libopenssl-3-fips-provider-64bit-debuginfo
libopenssl-3-fips-provider-32bit-debuginfo
libopenssl-3-fips-provider-32bit
libopenssl-3-fips-provider
libopenssl-3-fips-provider-debuginfo
edk2 (Ubuntu package)

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

APEX Cloud Platform for Microsoft Azure - update to 01.04.00.00
Guardium Data Security Center (GDSC) - update to 3.6.1
libopenssl3-64bit-debuginfo - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
openssl-3 - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150400.4.69.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
openssl-3-debugsource - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150400.4.69.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
libopenssl-3-devel - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150400.4.69.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
openssl-3-debuginfo - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150400.4.69.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
libopenssl3 - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150400.4.69.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
libopenssl3-debuginfo - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150400.4.69.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
libopenssl3-32bit - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
libopenssl-3-devel-32bit - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
libopenssl3-32bit-debuginfo - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
openssl-3-doc - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
libopenssl3-64bit - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
libopenssl-3-devel-64bit - addressed in versions 3.0.8-150400.4.66.1, 3.0.8-150500.5.45.1, 3.0.8-150500.5.48.1, 3.1.4-150600.5.18.1
openssl - update to 3.0.12-22
openssl-debuginfo - update to 3.0.12-22
openssl-debugsource - update to 3.0.12-22
openssl-devel - update to 3.0.12-22
openssl-libs - update to 3.0.12-22
openssl-perl - update to 3.0.12-22
openssl-help - update to 3.0.12-22
libopenssl-3-fips-provider-64bit - update to 3.1.4-150600.5.18.1
libopenssl-3-fips-provider-64bit-debuginfo - update to 3.1.4-150600.5.18.1
libopenssl-3-fips-provider-32bit-debuginfo - update to 3.1.4-150600.5.18.1
libopenssl-3-fips-provider-32bit - update to 3.1.4-150600.5.18.1
libopenssl-3-fips-provider - update to 3.1.4-150600.5.18.1
libopenssl-3-fips-provider-debuginfo - update to 3.1.4-150600.5.18.1
IQ Engine - update to 10.8r3
edk2 (Ubuntu package) - addressed in versions 2022.02-3ubuntu0.22.04.4, 2022.02-3ubuntu0.22.04.5, 2024.02-2ubuntu0.6, 2024.02-2ubuntu0.7, 2025.02-3ubuntu2.2

• https://gist.github.com/c0r0n3r/abccc14d4d96c0442f3a77fa5ca255d1
• https://dheatattack.gitlab.io/details/
• https://dheatattack.gitlab.io/faq/

• Denial of service in Diffie-Hellman Key Agreement Protocol implementation
• SUSE update for openssl-3
• SUSE update for openssl-3
• SUSE update for openssl-3
• SUSE update for openssl-3
• Denial of service in BIG-IP configuration utility and OpenSSH
• SUSE update for openssl-3
• Multiple vulnerabilities in Guardium Data Security Center
• APEX Cloud Platform for Microsoft Azure update for third-party components
• Denial of service in IQ Engine Diffie-Hellman Key Agreement protocol
• openEuler 24.03 LTS update for openssl
• openEuler 24.03 LTS SP2 update for openssl
• openEuler 24.03 LTS SP1 update for openssl
• Ubuntu update for edk2
• Ubuntu update for edk2