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Fencer Vulns
medium 5.9

CVE-2025-9232 json

Out-of-bounds read in HTTP client no_proxy handling

published 2025-09-30 13 mo ago modified 2026-11-06 2 d ago also EUVD-2025-31727 , GHSA-76r2-c3cg-f5r9 , JLSEC-2026-268

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

Issue summary: An application using the OpenSSL HTTP client API functions may trigger an out-of-bounds read if the 'no_proxy' environment variable is set and the host portion of the authority component of the HTTP URL is an IPv6 address.

Impact summary: An out-of-bounds read can trigger a crash which leads to Denial of Service for an application.

The OpenSSL HTTP client API functions can be used directly by applications but they are also used by the OCSP client functions and CMP (Certificate Management Protocol) client implementation in OpenSSL. However the URLs used by these implementations are unlikely to be controlled by an attacker.

In this vulnerable code the out of bounds read can only trigger a crash. Furthermore the vulnerability requires an attacker-controlled URL to be passed from an application to the OpenSSL function and the user has to have a 'no_proxy' environment variable set. For the aforementioned reasons the issue was assessed as Low severity.

The vulnerable code was introduced in the following patch releases: 3.0.16, 3.1.8, 3.2.4, 3.3.3, 3.4.0 and 3.5.0.

The FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this issue, as the HTTP client implementation is outside the OpenSSL FIPS module boundary.

Patch / fix

  • julia OpenSSL_jll 3.0.20+0, 3.5.4+0
  • OpenSSL OpenSSL 3.0.18, 3.2.6, 3.3.5, 3.4.3, 3.5.4
  • Siemens RUGGEDCOM RST2428P V3.3, V4.0
  • 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 SIDIS Prime V4.0.800
  • Siemens SIDIS Secured SmartPlug V7.26.0310
  • Siemens SIMATIC CN 4100 V5.0
  • openssl Debian 12 3.0.17-1~deb12u3
  • openssl Debian 13 3.5.1-1+deb13u1
  • openssl Debian 14 3.5.4-1

debian advisories DEBIAN-CVE-2025-9232

  • edk2 Ubuntu 26.04 LTS, Ubuntu 25.10 2025.02-8ubuntu3
  • openssl Ubuntu 26.04 LTS, Ubuntu 25.10 3.5.3-1ubuntu2

ubuntu advisories UBUNTU-CVE-2025-9232

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 hummingbird 1 3.5.6-0.1.hum1
  • openssl-libs hummingbird 1 3.5.6-0.1.hum1
  • openssl-perl hummingbird 1 3.5.6-0.1.hum1
  • openssl-config-fips hummingbird 1 3.5.6-0.1.hum1
  • openssl-devel-engine hummingbird 1 3.5.6-0.1.hum1

red hat advisories RHSA-2026:7261

  • openssl-3 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 3.5.0-160000.4.1

suse advisories SUSE-SU-2025:21213-1SUSE-SU-2025:21224-1

  • openssl-3 openSUSE Tumbleweed 3.5.3-2.1
  • openssl-3 openSUSE Leap 16.0 3.5.0-160000.4.1
  • regclient openSUSE Tumbleweed 0.10.0-1.1

opensuse advisories openSUSE-SU-2026:10237-1openSUSE-SU-2025:20164-1openSUSE-SU-2025:15723-1

  • openssl Alpine 3.17 3.0.19-r0
  • openssl Alpine 3.19 3.1.8-r1
  • openssl Alpine 3.21, Alpine 3.20 3.3.5-r0
  • openssl Alpine 3.24, Alpine 3.23, Alpine 3.22 3.5.4-r0

alpine advisories ALPINE-CVE-2025-9232

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 3.3.5-1

azure linux advisories AZL-67977

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-2025-9232 updated cvss 3.1

openssl: Out-of-bounds read in HTTP client no_proxy handling

  • Red Hat Enterprise Linux 9 edk2, openssl, edk2-ovmf, edk2-tools, edk2-aarch64, openssl-libs, +1 more Red Hat Enterprise Linux 10 edk2, openssl Red Hat JBoss Core Services openssl Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-dashboard-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-mod-arch-automl-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, rhoai/odh-mod-arch-mlflow-rhel9, +6 more
    under investigation
  • Red Hat Hardened Images openssl 3.5.6-0.1.hum1, openssl-libs 3.5.6-0.1.hum1, openssl-perl 3.5.6-0.1.hum1, openssl-config-fips 3.5.6-0.1.hum1, openssl-devel-engine 3.5.6-0.1.hum1
    fixed: vendor fix RHSA-2026:7261
  • Red Hat Enterprise Linux 6 openssl, openssl-perl 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 shim, shim-x64, shim-aa64, compat-openssl11, shim-unsigned-x64, shim-unsigned-aarch64 Red Hat Enterprise Linux 10 shim, shim-unsigned-x64, shim-unsigned-aarch64 Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-kube-rbac-proxy-rhel9, rhoai/odh-maas-controller-rhel9, rhoai/odh-mlflow-operator-rhel9, rhoai/odh-model-controller-rhel9, rhoai/odh-ogx-k8s-operator-rhel9, +14 more
    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-26-202-04 updated cvss 5.9

Siemens SIDIS Secured SmartPlug

  • Siemens SIDIS Secured SmartPlug < 7.26.0310
    affected: fixed in V7.26.0310

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

cisa ICSA-25-162-05 updated cvss 5.9

Siemens SIMATIC S7-1500 CPU family

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.5
    affected: mitigation, no fix available

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

cisa ICSA-26-071-03 updated cvss 5.9

Siemens SIDIS Prime

  • Siemens SIDIS Prime < 4.0.800
    affected: fixed in V4.0.800

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

cisa ICSA-26-043-06 updated cvss 5.9

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 products
    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 SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
13 mo ago

Exploit prediction

2.21% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia OpenSSL_jll
>=3.0.16+0, <3.0.20+0
>=3.5.0+0, <3.5.4+0
3.0.20+0
3.5.4+0

Affected products

  • OpenSSL OpenSSL
  • 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 SIDIS Prime
  • Siemens SIDIS Secured SmartPlug
  • Siemens SIMATIC CN 4100
  • 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
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.