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Fencer Vulns
medium 5.5

CVE-2023-32611 json

G_variant_byteswap() can take a long time with some non-normal inputs

published 2023-09-14 3 y ago modified 2026-10-15 25 d ago also EUVD-2023-36854 , JLSEC-2025-161

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

A flaw was found in GLib. GVariant deserialization is vulnerable to a slowdown issue where a crafted GVariant can cause excessive processing, leading to denial of service.

Patch / fix

  • julia Glib_jll 2.76.5+0
  • 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
  • glib2.0 Debian 14, Debian 13, Debian 12 2.74.4-1

debian advisories DEBIAN-CVE-2023-32611

  • glib2.0 Ubuntu 20.04 LTS 2.64.6-1~ubuntu20.04.6
  • glib2.0 Ubuntu 22.04 LTS 2.72.4-0ubuntu2.2
  • glib2.0 Ubuntu Pro 14.04 LTS 2.40.2-0ubuntu1.1+esm6
  • glib2.0 Ubuntu Pro 16.04 LTS 2.48.2-0ubuntu4.8+esm3
  • glib2.0 Ubuntu Pro 18.04 LTS 2.56.4-0ubuntu0.18.04.9+esm3

ubuntu advisories UBUNTU-CVE-2023-32611

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

  • mingw-glib2 RHEL 9 2.78.0-1.el9
  • mingw32-glib2 RHEL 9 2.78.0-1.el9
  • mingw64-glib2 RHEL 9 2.78.0-1.el9
  • glib2 RHEL 9 2.68.4-11.el9
  • glib2-tests RHEL 9 2.68.4-11.el9

red hat advisories RHSA-2024:2528RHSA-2023:6631

  • glib2 SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS +1 more 2.54.3-150000.4.29.1

suse advisories SUSE-SU-2023:3535-1

  • mingw32-glib2 AlmaLinux 9 2.78.0-1.el9
  • mingw64-glib2 AlmaLinux 9 2.78.0-1.el9
  • glib2 AlmaLinux 9 2.68.4-11.el9
  • glib2-tests AlmaLinux 9 2.68.4-11.el9

almalinux advisories ALSA-2024:2528ALSA-2023:6631

  • glib CBL-Mariner 2.0 2.71.0-4

azure linux advisories AZL-28774

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-2023-32611 updated cvss 6.5

glib: g_variant_byteswap() can take a long time with some non-normal inputs

  • Red Hat Enterprise Linux 6 glib2 Red Hat Enterprise Linux 7 glib2, glib2-fam, glib2-tests
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 glib2, glib2-fam, glib2-tests
    affected: no fix available
  • Red Hat CodeReady Linux Builder (v. 9) glib2-static 2.68.4-11.el9, glib2-debuginfo 2.68.4-11.el9, glib2-debugsource 2.68.4-11.el9, glib2-devel-debuginfo 2.68.4-11.el9, glib2-tests-debuginfo 2.68.4-11.el9 Red Hat Enterprise Linux AppStream (v. 9) glib2-tests 2.68.4-11.el9 Red Hat Enterprise Linux BaseOS (v. 9) glib2 2.68.4-11.el9
    fixed: vendor fix RHSA-2023:6631
  • Red Hat Enterprise Linux CRB (v. 9) mingw-glib2 2.78.0-1.el9, mingw32-glib2 2.78.0-1.el9, mingw64-glib2 2.78.0-1.el9
    fixed: vendor fix RHSA-2024:2528

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-23-348-10 updated cvss 5.5

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
no
Technical impact
partial
Assessed
17 mo ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
OSV 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia Glib_jll
<2.76.5+0
2.76.5+0

Affected products

  • n/a glib2
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Fedora Extra Packages for Enterprise Linux
  • Fedora Fedora 38
  • Fedora Fedora 37
  • 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-400 Uncontrolled Resource Consumption

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.