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Fencer Vulns
medium 5.5

CVE-2023-42366 json

A heap-buffer-overflow was discovered in BusyBox v.1.36.1 in the next_token function at awk.c:1159.

published 2023-11-27 2 y ago modified 2026-10-08 31 d ago also EUVD-2023-46819

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

A heap-buffer-overflow was discovered in BusyBox v.1.36.1 in the next_token function at awk.c:1159.

Patch / fix

  • busybox Debian 14 1:1.37.0-8

debian advisories DEBIAN-CVE-2023-42366

  • busybox SLES for SAP applications 16.0, SLES 16.0 1.37.0-160000.7.1
  • busybox SLE Module for Basesystem 15 SP7 1.37.0-150700.18.21.1
  • busybox Linux Micro 6.0 1.36.1-5.1
  • busybox SLES LTSS Extended Security 12 SP5 1.35.0-10.9.1

suse advisories SUSE-SU-2026:24154-1SUSE-SU-2026:3933-1SUSE-SU-2026:23446-1SUSE-SU-2026:3900-1

  • busybox openSUSE Leap 16.0 1.37.0-160000.7.1
  • busybox openSUSE Tumbleweed 1.38.0-2.1

opensuse advisories openSUSE-SU-2026:22040-1openSUSE-SU-2026:11605-1

  • busybox Alpine 3.16 1.35.0-r18
  • busybox Alpine 3.17 1.35.0-r30
  • busybox Alpine 3.18 1.36.1-r6
  • busybox Alpine 3.19 1.36.1-r16
  • busybox Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 1.36.1-r25

alpine advisories ALPINE-CVE-2023-42366

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

  • busybox CBL-Mariner 2.0 1.35.0-12
  • busybox Azure Linux 3.0 1.36.1-9

azure linux advisories AZL-33492AZL-34577

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-2023-42366 updated cvss 7.1

busybox: A heap-buffer-overflow

  • Red Hat Enterprise Linux 6 busybox, busybox-petitboot
    affected: no fix planned “Out of support scope”

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 cvss 5.5

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 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
31 d ago

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugs.busybox.net https://bugs.busybox.net/show_bug.cgi?id=15874 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

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

Classification

Weakness

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.