medium 6.5

CVE-2024-8096 json

OCSP stapling bypass with GnuTLS

published 2024-09-11 2 y ago modified 2026-10-15 25 d ago also EUVD-2024-48936 , GHSA-gv3v-x3f3-7fxm , JLSEC-2026-418

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits: 0; none known

When curl is told to use the Certificate Status Request TLS extension, often referred to as OCSP stapling, to verify that the server certificate is valid, it might fail to detect some OCSP problems and instead wrongly consider the response as fine. If the returned status reports another error than 'revoked' (like for example 'unauthorized') it is not treated as a bad certficate.

Patch / fix

fixed in 21 distros 6

julia CURL_jll 8.11.0+0
julia LibCURL_jll 8.11.0+0
Siemens RUGGEDCOM RST2428P V3.3
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family V3.3
Siemens SCALANCE XCH328 V3.3
Siemens SCALANCE XCM324 V3.3
Siemens SCALANCE XCM328 V3.3
Siemens SCALANCE XCM332 V3.3
Siemens SCALANCE XRH334 (24 V DC, 8xFO, CC) V3.3
Siemens SCALANCE XRM334 (230 V AC, 12xFO) V3.3
Siemens SCALANCE XRM334 (230 V AC, 8xFO) V3.3
Siemens SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) V3.3
Siemens SCALANCE XRM334 (24 V DC, 12xFO) V3.3
Siemens SCALANCE XRM334 (24 V DC, 8xFO) V3.3
Siemens SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+) V3.3
Siemens SCALANCE XRM334 (2x230 V AC, 12xFO) V3.3
Siemens SCALANCE XRM334 (2x230 V AC, 8xFO) V3.3
Siemens SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+) V3.3
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5

debian ubuntu suse opensuse alpine azure linux

curl Debian 12 7.88.1-10+deb12u8
curl Debian 14, Debian 13 8.10.0-1

debian advisories DEBIAN-CVE-2024-8096

curl Ubuntu 20.04 LTS 7.68.0-1ubuntu2.24
curl Ubuntu 22.04 LTS 7.81.0-1ubuntu1.18
curl Ubuntu 24.04 LTS 8.5.0-2ubuntu10.4
curl Ubuntu Pro 16.04 LTS 7.47.0-1ubuntu2.19+esm17
curl Ubuntu Pro 18.04 LTS 7.58.0-2ubuntu3.24+esm10

ubuntu advisories UBUNTU-CVE-2024-8096

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

curl Linux Micro 6.1 8.12.1-slfo.1.1_1.1
curl SLE Module for Basesystem 15 SP5, SLE Micro 5.5, SLE Micro 5.4 +4 more 8.0.1-150400.5.50.1
curl SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 8.6.0-150600.4.6.1
curl SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 8.0.1-11.92.1
curl SLE Micro 5.2, SLE Micro 5.1 7.66.0-150200.4.78.1

suse advisories SUSE-SU-2025:20239-1 SUSE-SU-2024:3211-1 SUSE-SU-2024:3204-1 SUSE-SU-2024:3203-1 SUSE-SU-2024:3202-1

curl openSUSE Tumbleweed 8.10.0-1.1

opensuse advisories openSUSE-SU-2024:14333-1

curl Alpine 3.24, Alpine 3.23, Alpine 3.22 +4 more 8.10.0-r0

alpine advisories ALPINE-CVE-2024-8096

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

curl CBL-Mariner 2.0, Azure Linux 3.0 8.8.0-3
cmake Azure Linux 3.0 3.30.3-2
cmake CBL-Mariner 2.0 3.21.4-18
mysql CBL-Mariner 2.0 8.0.36-1

azure linux advisories AZL-49035 AZL-49038 AZL-49041 AZL-49099 AZL-49132

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-2024-8096 updated 2026-11-05 cvss 6.5

curl: OCSP stapling bypass with GnuTLS

Red Hat Enterprise Linux 6 curl, libcurl
affected: workaround, no fix planned “Out of support scope”
Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
affected: workaround, no fix planned “Will not fix”
Red Hat Enterprise Linux 7 curl, libcurl Red Hat Enterprise Linux 8 curl, libcurl, libcurl-minimal Red Hat Enterprise Linux 9 curl, libcurl, curl-minimal, libcurl-minimal Red Hat Enterprise Linux 10 curl Red Hat JBoss Core Services jbcs-httpd24-curl jbcs-httpd24-curl
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-26-043-06 updated 2026-02-25 cvss 6.5

Siemens SINEC OS

Siemens RUGGEDCOM RST2428P (6GK6242-6PA00) < 3.3
affected: fixed in V3.3 support.industry.siemens.com
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family < 3.3
affected: fixed in V3.3
Siemens SCALANCE XCH328 (6GK5328-4TS01-2EC2) < 3.3 Siemens SCALANCE XCM324 (6GK5324-8TS01-2AC2) < 3.3 Siemens SCALANCE XCM328 (6GK5328-4TS01-2AC2) < 3.3 Siemens SCALANCE XCM332 (6GK5332-0GA01-2AC2) < 3.3 Siemens SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3) < 3.3 Siemens SCALANCE XRM334 (2x230 V AC, 8xFO) (6GK5334-2TS01-4AR3) < 3.3

+8 more productsfewer

Siemens SCALANCE XRM334 (2x230 V AC, 12xFO) (6GK5334-3TS01-4AR3) < 3.3 Siemens SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-4AR3) < 3.3 Siemens SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3) < 3.3 Siemens SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3) < 3.3 Siemens SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-2AR3) < 3.3 Siemens SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3) < 3.3 Siemens SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3) < 3.3 Siemens SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-3AR3) < 3.3

affected: fixed in V3.3 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-23-348-10 updated 2025-08-12 cvss 6.5

Siemens SIMATIC S7-1500

Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
affected: fixed in V3.1.5, mitigation 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 (2024-09-11)

Exploit prediction

0.82% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

hackerone.com https://hackerone.com/reports/2669852 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
OSV	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
julia	CURL_jll	<8.11.0+0	8.11.0+0
julia	LibCURL_jll	<8.11.0+0	8.11.0+0

Affected products

curl curl
Siemens RUGGEDCOM RST2428P
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family
Siemens SCALANCE XCH328
Siemens SCALANCE XCM324
Siemens SCALANCE XCM328
Siemens SCALANCE XCM332
Siemens SCALANCE XRH334 (24 V DC, 8xFO, CC)
Siemens SCALANCE XRM334 (230 V AC, 12xFO)
Siemens SCALANCE XRM334 (230 V AC, 8xFO)
Siemens SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+)
Siemens SCALANCE XRM334 (24 V DC, 12xFO)
Siemens SCALANCE XRM334 (24 V DC, 8xFO)
Siemens SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+)
Siemens SCALANCE XRM334 (2x230 V AC, 12xFO)
Siemens SCALANCE XRM334 (2x230 V AC, 8xFO)
Siemens SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+)
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness

CWE-295 Improper Certificate Validation

References

hackerone.com /reports/2669852
exploit, issue-tracking, third-party-advisory, web
curl.se /docs/CVE-2024-8096.json
vendor-advisory, web
curl.se /docs/CVE-2024-8096.html
vendor-advisory, web
openwall.com /lists/oss-security/2024/09/11/1
mailing-list, third-party-advisory, web
security.netapp.com /advisory/ntap-20241011-0005/
third-party-advisory, web
lists.debian.org /debian-lts-announce/2024/11/msg00008.html
mailing-list, third-party-advisory, web
cert-portal.siemens.com /productcert/html/ssa-398330.html
cert-portal.siemens.com /productcert/html/ssa-089022.html
github.com /advisories/GHSA-gv3v-x3f3-7fxm
web
nvd.nist.gov /vuln/detail/CVE-2024-8096
web
security.netapp.com /advisory/ntap-20241011-0005
web

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.

Summary