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Fencer Vulns
medium 4.0

CVE-2025-59362 json

Squid through 7.1 mishandles ASN.1 encoding of long SNMP OIDs.

published 2025-09-26 13 mo ago modified 2026-11-05 3 d ago also EUVD-2025-31363

cvss
4.0
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 33%
public exploits
0
none known

Summary

Squid through 7.1 mishandles ASN.1 encoding of long SNMP OIDs. This occurs in asn_build_objid in lib/snmplib/asn1.c.

Patch / fix

  • squid Debian 12 5.7-2+deb12u5
  • squid Debian 13 6.13-2+deb13u1
  • squid Debian 14 7.2-1

debian advisories DEBIAN-CVE-2025-59362

  • squid Ubuntu 22.04 LTS 5.9-0ubuntu0.22.04.3
  • squid Ubuntu 24.04 LTS 6.13-0ubuntu0.24.04.2
  • squid Ubuntu 25.10 6.13-1ubuntu4
  • squid Ubuntu Pro 20.04 LTS 4.10-1ubuntu1.13+esm2
  • squid3 Ubuntu Pro 16.04 LTS 3.5.12-1ubuntu7.16+esm6
  • squid3 Ubuntu Pro 18.04 LTS 3.5.27-1ubuntu1.14+esm5

ubuntu advisories UBUNTU-CVE-2025-59362

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

  • squid SLES for SAP applications 16.0, SLES 16.0 6.12-160000.3.1
  • squid SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +7 more 5.7-150400.3.35.1
  • squid SLE Module for Server Applications 15 SP7, SLE Module for Server Applications 15 SP6, openSUSE Leap 15.6 6.10-150600.3.9.1
  • squid SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 4.17-150000.5.55.1
  • squid SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 4.17-4.53.1

suse advisories SUSE-SU-2026:20078-1SUSE-SU-2025:03627-1SUSE-SU-2025:03607-1SUSE-SU-2025:03606-1SUSE-SU-2025:03521-1

  • squid openSUSE Tumbleweed 7.6-1.1
  • squid openSUSE Leap 16.0 6.12-160000.3.1

opensuse advisories openSUSE-SU-2026:11069-1openSUSE-SU-2026:20027-1

  • squid Alpine 3.24, Alpine 3.23 7.3-r0

alpine advisories ALPINE-CVE-2025-59362

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

  • squid Azure Linux 3.0 6.13-3

azure linux advisories AZL-67850

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-2025-59362 updated cvss 5.3

squid-cache: Squid cache buffer overflow

  • Red Hat Enterprise Linux 6 squid, squid34 Red Hat Enterprise Linux 7 squid, squid-sysvinit, squid-migration-script
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 squid, libecap Red Hat Enterprise Linux 9 squid Red Hat Enterprise Linux 10 squid
    affected: workaround, no fix available “Fix deferred”

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 SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
13 mo ago

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/Microsvuln/advisories/blob/main/CVE-2025-59362/CVE-2025-59362.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.0 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 3.1 4.0 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow

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.