# CVE-2024-4603: libssl3t64: Issue summary: Checking excessively long DSA keys or parameters may be veryslow.Impact summary: Applications that use... CVE-2024-4603 is fixed in 14 products on 1 platform, first by DEBIAN-CVE-2024-4603, released May 16, 2024. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2024-4603 - Priority: Routine - CVSS: 5.3 (Low) - EPSS: 0.0113 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: May 16, 2024 ## Description Issue summary: Checking excessively long DSA keys or parameters may be veryslow.Impact summary: Applications that use the functions EVP_PKEY_param_check()or EVP_PKEY_public_check() to check a DSA public key or DSA parameters mayexperience long delays. Where the key or parameters that are being checkedhave been obtained from an untrusted source this may lead to a Denial ofService.The functions EVP_PKEY_param_check() or EVP_PKEY_public_check() performvarious checks on DSA parameters. Some of those computations take a longtimeif the modulus (`p` parameter) is too large.Trying to use a very large modulus is slow and OpenSSL will not allow usingpublic keys with a modulus which is over 10,000 bits in length forsignatureverification. However the key and parameter check functions do not limitthe modulus size when performing the checks.An application that calls EVP_PKEY_param_check() or EVP_PKEY_public_check()and supplies a key or parameters obtained from an untrusted source could bevulnerable to a Denial of Service attack.These functions are not called by OpenSSL itself on untrusted DSA keys soonly applications that directly call these functions may be vulnerable.Also vulnerable are the OpenSSL pkey and pkeyparam command lineapplicationswhen using the `-check` option.The OpenSSL SSL/TLS implementation is not affected by this issue.The OpenSSL 3.0 and 3.1 FIPS providers are affected by this issue. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | libssl3 Ubuntu 22.04.1 LTS (jammy) | 3.0.2-0ubuntu1.17 | [libssl3 3.0.2-0ubuntu1.17](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libssl3-3.0.2-0ubuntu1.17.md) | Jun 27, 2024 | | Linux | libssl3t64 Ubuntu 24.04.5 LTS (noble) | 3.0.13-0ubuntu3.2 | [libssl3t64 3.0.13-0ubuntu3.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libssl3t64-3.0.13-0ubuntu3.2.md) | Jun 27, 2024 | | Linux | libssl3t64 Ubuntu 24.10 (oracular) | 3.2.2-1ubuntu1 | [libssl3t64 3.2.2-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libssl3t64-3.2.2-1ubuntu1.md) | May 28, 2024 | | Linux | libssl3t64 Ubuntu 25.04 (plucky) | 3.2.2-1ubuntu1 | [libssl3t64 3.2.2-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libssl3t64-3.2.2-1ubuntu1.md) | May 28, 2024 | | Linux | openssl Debian 12.15 (bookworm) | 3.0.14-1~deb12u1 | [DEBIAN-CVE-2024-4603](https://patchblox.com/security/data/fix/linux/debian-cve-2024-4603.md) | May 16, 2024 | | Linux | openssl Debian 13.5 (trixie) | 3.2.2-1 | [DEBIAN-CVE-2024-4603](https://patchblox.com/security/data/fix/linux/debian-cve-2024-4603.md) | May 16, 2024 | | Linux | openssl Debian 14 | 3.2.2-1 | [DEBIAN-CVE-2024-4603](https://patchblox.com/security/data/fix/linux/debian-cve-2024-4603.md) | May 16, 2024 | | Linux | openssl RHEL 9 | 1:3.2.2-6.el9_5 | [RHSA-2024:9333](https://patchblox.com/security/data/fix/linux/rhsa-2024-9333.md) | Nov 12, 2024 | | Linux | openssl Ubuntu 22.04.1 LTS (jammy) | 3.0.2-0ubuntu1.17 | [openssl 3.0.2-0ubuntu1.17](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-openssl-3.0.2-0ubuntu1.17.md) | Jun 27, 2024 | | Linux | openssl Ubuntu 24.04.5 LTS (noble) | 3.0.13-0ubuntu3.2 | [openssl 3.0.13-0ubuntu3.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-openssl-3.0.13-0ubuntu3.2.md) | Jun 27, 2024 | | Linux | openssl Ubuntu 24.10 (oracular) | 3.2.2-1ubuntu1 | [openssl 3.2.2-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-openssl-3.2.2-1ubuntu1.md) | May 28, 2024 | | Linux | openssl Ubuntu 25.04 (plucky) | 3.2.2-1ubuntu1 | [openssl 3.2.2-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-openssl-3.2.2-1ubuntu1.md) | May 28, 2024 | | Linux | openssl almalinux 9 | 1:3.2.2-6.el9_5 | [ALSA-2024:9333](https://patchblox.com/security/data/fix/linux/alsa-2024-9333.md) | Nov 12, 2024 | | Linux | openssl amzn 2023 | 1:3.0.8-1.amzn2023.0.14 | [ALAS2023-2024-677](https://patchblox.com/security/data/fix/linux/alas2023-2024-677.md) | Aug 1, 2024 | | Linux | openssl ol 9 | 1:3.2.2-6.0.1.el9_5 | [ELSA-2024-9333](https://patchblox.com/security/data/fix/linux/elsa-2024-9333.md) | Nov 14, 2024 | | Linux | openssl rocky 9 | 1:3.2.2-6.el9_5.1 | [RLSA-2024:9333](https://patchblox.com/security/data/fix/linux/rlsa-2024-9333.md) | Mar 17, 2025 | | Linux | openssl-3 opensuse-leap 15.6 | 3.1.4-150600.5.7.1 | [SUSE-SU-2024:2066-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-2066-1.md) | Jun 18, 2024 | | Linux | openssl-3 sles 15.6 | 3.1.4-150600.5.7.1 | [SUSE-SU-2024:2066-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-2066-1.md) | Jun 18, 2024 | | Linux | openssl-debuginfo amzn 2023 | 1:3.0.8-1.amzn2023.0.14 | [ALAS2023-2024-677](https://patchblox.com/security/data/fix/linux/alas2023-2024-677.md) | Aug 1, 2024 | | Linux | openssl-debugsource amzn 2023 | 1:3.0.8-1.amzn2023.0.14 | [ALAS2023-2024-677](https://patchblox.com/security/data/fix/linux/alas2023-2024-677.md) | Aug 1, 2024 | | Linux | openssl-devel RHEL 9 | 1:3.2.2-6.el9_5 | [RHSA-2024:9333](https://patchblox.com/security/data/fix/linux/rhsa-2024-9333.md) | Nov 12, 2024 | | Linux | openssl-devel almalinux 9 | 1:3.2.2-6.el9_5 | [ALSA-2024:9333](https://patchblox.com/security/data/fix/linux/alsa-2024-9333.md) | Nov 12, 2024 | | Linux | openssl-devel amzn 2023 | 1:3.0.8-1.amzn2023.0.14 | [ALAS2023-2024-677](https://patchblox.com/security/data/fix/linux/alas2023-2024-677.md) | Aug 1, 2024 | | Linux | openssl-devel ol 9 | 1:3.2.2-6.0.1.el9_5 | [ELSA-2024-9333](https://patchblox.com/security/data/fix/linux/elsa-2024-9333.md) | Nov 14, 2024 | | Linux | openssl-fips-provider ol 9 | 0:3.0.7-6.0.1.el9_5 | [ELSA-2024-9333](https://patchblox.com/security/data/fix/linux/elsa-2024-9333.md) | Nov 14, 2024 | | Linux | openssl-fips-provider rocky 9 | 0:3.0.7-6.el9_5 | [RLSA-2024:9333](https://patchblox.com/security/data/fix/linux/rlsa-2024-9333.md) | Mar 17, 2025 | | Linux | openssl-fips-provider-so ol 9 | 0:3.0.7-6.0.1.el9_5 | [ELSA-2024-9333](https://patchblox.com/security/data/fix/linux/elsa-2024-9333.md) | Nov 14, 2024 | | Linux | openssl-libs RHEL 9 | 1:3.2.2-6.el9_5 | [RHSA-2024:9333](https://patchblox.com/security/data/fix/linux/rhsa-2024-9333.md) | Nov 12, 2024 | | Linux | openssl-libs almalinux 9 | 1:3.2.2-6.el9_5 | [ALSA-2024:9333](https://patchblox.com/security/data/fix/linux/alsa-2024-9333.md) | Nov 12, 2024 | | Linux | openssl-libs amzn 2023 | 1:3.0.8-1.amzn2023.0.14 | [ALAS2023-2024-677](https://patchblox.com/security/data/fix/linux/alas2023-2024-677.md) | Aug 1, 2024 | | Linux | openssl-libs ol 9 | 1:3.2.2-6.0.1.el9_5 | [ELSA-2024-9333](https://patchblox.com/security/data/fix/linux/elsa-2024-9333.md) | Nov 14, 2024 | | Linux | openssl-libs-debuginfo amzn 2023 | 1:3.0.8-1.amzn2023.0.14 | [ALAS2023-2024-677](https://patchblox.com/security/data/fix/linux/alas2023-2024-677.md) | Aug 1, 2024 | | Linux | openssl-perl RHEL 9 | 1:3.2.2-6.el9_5 | [RHSA-2024:9333](https://patchblox.com/security/data/fix/linux/rhsa-2024-9333.md) | Nov 12, 2024 | | Linux | openssl-perl almalinux 9 | 1:3.2.2-6.el9_5 | [ALSA-2024:9333](https://patchblox.com/security/data/fix/linux/alsa-2024-9333.md) | Nov 12, 2024 | | Linux | openssl-perl amzn 2023 | 1:3.0.8-1.amzn2023.0.14 | [ALAS2023-2024-677](https://patchblox.com/security/data/fix/linux/alas2023-2024-677.md) | Aug 1, 2024 | | Linux | openssl-perl ol 9 | 1:3.2.2-6.0.1.el9_5 | [ELSA-2024-9333](https://patchblox.com/security/data/fix/linux/elsa-2024-9333.md) | Nov 14, 2024 | | Linux | openssl-snapsafe-libs amzn 2023 | 1:3.0.8-1.amzn2023.0.14 | [ALAS2023-2024-677](https://patchblox.com/security/data/fix/linux/alas2023-2024-677.md) | Aug 1, 2024 | | Linux | openssl-snapsafe-libs-debuginfo amzn 2023 | 1:3.0.8-1.amzn2023.0.14 | [ALAS2023-2024-677](https://patchblox.com/security/data/fix/linux/alas2023-2024-677.md) | Aug 1, 2024 | --- Data as of 2026-11-08T00:53:09Z UTC. 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