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Fencer Vulns
medium 5.3

CVE-2024-4603 json

Excessive time spent checking DSA keys and parameters

published 2024-05-16 2 y ago modified 2026-11-06 2 d ago also EUVD-2024-44212 , GHSA-85xr-ghj6-6m46 , JLSEC-2026-250

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

Issue summary: Checking excessively long DSA keys or parameters may be very slow.

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 may experience long delays. Where the key or parameters that are being checked have been obtained from an untrusted source this may lead to a Denial of Service.

The functions EVP_PKEY_param_check() or EVP_PKEY_public_check() perform various checks on DSA parameters. Some of those computations take a long time if the modulus (`p` parameter) is too large.

Trying to use a very large modulus is slow and OpenSSL will not allow using public keys with a modulus which is over 10,000 bits in length for signature verification. However the key and parameter check functions do not limit the 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 be vulnerable to a Denial of Service attack.

These functions are not called by OpenSSL itself on untrusted DSA keys so only applications that directly call these functions may be vulnerable.

Also vulnerable are the OpenSSL pkey and pkeyparam command line applications when 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.

Patch / fix

  • julia OpenSSL_jll 3.0.14+0
  • OpenSSL OpenSSL 3.0.14, 3.1.6, 3.2.2, 3.3.1
  • openssl Debian 12 3.0.14-1~deb12u1
  • openssl Debian 14, Debian 13 3.2.2-1

debian advisories DEBIAN-CVE-2024-4603

  • openssl Ubuntu 22.04 LTS 3.0.2-0ubuntu1.17
  • openssl Ubuntu 24.04 LTS 3.0.13-0ubuntu3.2
  • openssl Ubuntu Pro FIPS-updates 22.04 LTS 3.0.2-0ubuntu1.17+Fips1
  • openssl-fips Ubuntu Pro FIPS-updates 24.04 LTS 3.0.13-0ubuntu3.6+Fips1

ubuntu advisories UBUNTU-CVE-2024-4603

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openssl RHEL 9 1:3.2.2-6.el9_5
  • openssl-libs RHEL 9 1:3.2.2-6.el9_5
  • openssl-perl RHEL 9 1:3.2.2-6.el9_5

red hat advisories RHSA-2024:9333

  • libpulp Linux Micro 6.0 0.3.5-1.1
  • openssl-3 Linux Micro 6.0 3.1.4-6.1
  • jitterentropy Linux Micro 6.0 3.4.1-3.1
  • openssl-3 SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 3.1.4-150600.5.7.1
  • openssl-3 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +7 more 3.0.8-150400.4.54.1
  • openssl-3 SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 3.0.8-150500.5.33.1

suse advisories SUSE-SU-2025:20014-1SUSE-SU-2024:2066-1SUSE-SU-2024:1947-1SUSE-SU-2024:1789-1

  • openssl-3 openSUSE Tumbleweed 3.1.4-8.1

opensuse advisories openSUSE-SU-2024:13992-1

  • openssl AlmaLinux 9 1:3.2.2-6.el9_5
  • openssl-libs AlmaLinux 9 1:3.2.2-6.el9_5
  • openssl-perl AlmaLinux 9 1:3.2.2-6.el9_5

almalinux advisories ALSA-2024:9333

  • openssl Rocky Linux 9 1:3.2.2-6.el9_5.1
  • openssl-fips-provider Rocky Linux 9 3.0.7-6.el9_5

rocky linux advisories RLSA-2024:9333

  • openssl Alpine 3.17 3.0.13-r0
  • openssl Alpine 3.19, Alpine 3.18 3.1.5-r0
  • openssl Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 3.3.0-r2

alpine advisories ALPINE-CVE-2024-4603

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openssl Azure Linux 3.0 3.3.2-1
  • nodejs Azure Linux 3.0 20.14.0-1
  • edk2 Azure Linux 3.0 20240524git3e722403cd16-8
  • cloud-hypervisor-cvm CBL-Mariner 2.0, Azure Linux 3.0 38.0.72.2-1
  • hvloader CBL-Mariner 2.0 1.0.1-6

azure linux advisories AZL-42049AZL-42058AZL-42063AZL-42694AZL-42766AZL-47684

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-4603 updated cvss 5.3

openssl: Excessive time spent checking DSA keys and parameters

  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/fluentd-rhel8 Red Hat 3scale API Management Platform 2 3scale-amp2/backend-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux 6 openssl, openssl-perl
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 10 openssl
    affected: no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) openssl-perl 3.2.2-6.el9_5 Red Hat Enterprise Linux BaseOS (v. 9) openssl 3.2.2-6.el9_5, openssl-libs 3.2.2-6.el9_5
    fixed: vendor fix RHSA-2024:9333
  • Red Hat Enterprise Linux 7 ovmf, OVMF, AAVMF, openssl, openssl-libs, openssl-perl Red Hat Enterprise Linux 8 edk2, shim, openssl, shim-x64, edk2-ovmf, shim-aa64, +9 more Red Hat Enterprise Linux 9 edk2, shim, shim-x64, edk2-ovmf, shim-aa64, edk2-tools, +4 more Red Hat Enterprise Linux 10 edk2, shim Red Hat Enterprise Linux BaseOS (v. 9) openssl-fips-provider 3.0.7-6.el9_5, openssl-fips-provider-so 3.0.7-6.el9_5 Red Hat JBoss Core Services jbcs-httpd24-openssl
    +1 more products
    Red Hat JBoss Web Server 5 openssl
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-25-226-15 updated cvss 5.3

Siemens SINEC OS

  • Siemens RUGGEDCOM RST2428P (6GK6242-6PA00) < 3.1 Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family < 3.1
    affected: fixed in V3.1 support.industry.siemens.com
  • Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family
    not affected

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-24-319-06 updated cvss 5.3

Siemens SCALANCE M-800 Family

  • Siemens RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2) <V8.2 Siemens RUGGEDCOM RM1224 LTE(4G) NAM (6GK6108-4AM00-2DA2) <V8.2 Siemens SCALANCE M804PB (6GK5804-0AP00-2AA2) <V8.2 Siemens SCALANCE M812-1 ADSL-Router (6GK5812-1AA00-2AA2) <V8.2 Siemens SCALANCE M812-1 ADSL-Router (6GK5812-1BA00-2AA2) <V8.2 Siemens SCALANCE M816-1 ADSL-Router (6GK5816-1AA00-2AA2) <V8.2
    +20 more products
    Siemens SCALANCE M816-1 ADSL-Router (6GK5816-1BA00-2AA2) <V8.2 Siemens SCALANCE M826-2 SHDSL-Router (6GK5826-2AB00-2AB2) <V8.2 Siemens SCALANCE M874-2 (6GK5874-2AA00-2AA2) <V8.2 Siemens SCALANCE M874-3 (6GK5874-3AA00-2AA2) <V8.2 Siemens SCALANCE M874-3 3G-Router (CN) (6GK5874-3AA00-2FA2) <V8.2 Siemens SCALANCE M876-3 (6GK5876-3AA02-2BA2) <V8.2 Siemens SCALANCE M876-3 (ROK) (6GK5876-3AA02-2EA2) <V8.2 Siemens SCALANCE M876-4 (6GK5876-4AA10-2BA2) <V8.2 Siemens SCALANCE M876-4 (EU) (6GK5876-4AA00-2BA2) <V8.2 Siemens SCALANCE M876-4 (NAM) (6GK5876-4AA00-2DA2) <V8.2 Siemens SCALANCE MUM853-1 (A1) (6GK5853-2EA10-2AA1) <V8.2 Siemens SCALANCE MUM853-1 (B1) (6GK5853-2EA10-2BA1) <V8.2 Siemens SCALANCE MUM853-1 (EU) (6GK5853-2EA00-2DA1) <V8.2 Siemens SCALANCE MUM856-1 (A1) (6GK5856-2EA10-3AA1) <V8.2 Siemens SCALANCE MUM856-1 (B1) (6GK5856-2EA10-3BA1) <V8.2 Siemens SCALANCE MUM856-1 (CN) (6GK5856-2EA00-3FA1) <V8.2 Siemens SCALANCE MUM856-1 (EU) (6GK5856-2EA00-3DA1) <V8.2 Siemens SCALANCE MUM856-1 (RoW) (6GK5856-2EA00-3AA1) <V8.2 Siemens SCALANCE S615 EEC LAN-Router (6GK5615-0AA01-2AA2) <V8.2 Siemens SCALANCE S615 LAN-Router (6GK5615-0AA00-2AA2) <V8.2
    affected: fixed in V8.2 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-25-044-09 updated cvss 5.3

Siemens SCALANCE W700 IEEE 802.11ax

  • Siemens SCALANCE WAB762-1 (6GK5762-1AJ00-6AA0) <V3.0.0 Siemens SCALANCE WAM763-1 (6GK5763-1AL00-7DA0) <V3.0.0 Siemens SCALANCE WAM763-1 (ME) (6GK5763-1AL00-7DC0) <V3.0.0 Siemens SCALANCE WAM763-1 (US) (6GK5763-1AL00-7DB0) <V3.0.0 Siemens SCALANCE WAM766-1 (6GK5766-1GE00-7DA0) <V3.0.0 Siemens SCALANCE WAM766-1 (ME) (6GK5766-1GE00-7DC0) <V3.0.0
    +13 more products
    Siemens SCALANCE WAM766-1 (US) (6GK5766-1GE00-7DB0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (6GK5766-1GE00-7TA0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (ME) (6GK5766-1GE00-7TC0) <V3.0.0 Siemens SCALANCE WAM766-1 EEC (US) (6GK5766-1GE00-7TB0) <V3.0.0 Siemens SCALANCE WUB762-1 (6GK5762-1AJ00-1AA0) <V3.0.0 Siemens SCALANCE WUB762-1 iFeatures (6GK5762-1AJ00-2AA0) <V3.0.0 Siemens SCALANCE WUM763-1 (6GK5763-1AL00-3AA0) <V3.0.0 Siemens SCALANCE WUM763-1 (6GK5763-1AL00-3DA0) <V3.0.0 Siemens SCALANCE WUM763-1 (US) (6GK5763-1AL00-3AB0) <V3.0.0 Siemens SCALANCE WUM763-1 (US) (6GK5763-1AL00-3DB0) <V3.0.0 Siemens SCALANCE WUM766-1 (6GK5766-1GE00-3DA0) <V3.0.0 Siemens SCALANCE WUM766-1 (ME) (6GK5766-1GE00-3DC0) <V3.0.0 Siemens SCALANCE WUM766-1 (USA) (6GK5766-1GE00-3DB0) <V3.0.0
    affected: fixed in V3.0.0 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
OSV 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem package affected fixed in
julia OpenSSL_jll
>=3.0.8+0, <3.0.14+0
3.0.14+0

Affected products

  • OpenSSL OpenSSL

Classification

Weakness
  • CWE-606 Unchecked Input for Loop Condition
  • CWE-834 Excessive Iteration
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.