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Fencer Vulns
high 8.6

CVE-2023-46848 in the critical feed json

Squid: denial of service in ftp

published 2023-11-03 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-51014

cvss
8.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
11.4%
EPSS 11.4% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

Squid is vulnerable to Denial of Service, where a remote attacker can perform DoS by sending ftp:// URLs in HTTP Request messages or constructing ftp:// URLs from FTP Native input.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 9 7:5.5-5.el9_2.1, 7:5.5-6.el9_3.1
  • Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support 7:5.2-1.el9_0.3
  • squid Debian 12 5.7-2+deb12u1
  • squid Debian 14, Debian 13 6.5-1

debian advisories DEBIAN-CVE-2023-46848

  • squid Ubuntu 22.04 LTS 5.7-0ubuntu0.22.04.2

ubuntu advisories UBUNTU-CVE-2023-46848

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 RHEL 9 7:5.5-6.el9_3.1
  • squid RHEL 9 7:5.5-5.el9_2.1
  • squid RHEL 9.0 EUS 7:5.2-1.el9_0.3

red hat advisories RHSA-2023:6748RHSA-2023:6266RHSA-2023:6268

  • squid SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES for SAP 15 SP1 +8 more 4.17-150000.5.38.1
  • squid SLES for SAP 12 SP5, SLES 12 SP5 4.17-4.30.1
  • squid SLE Module for Server Applications 15 SP5, SLE Module for Server Applications 15 SP4, openSUSE Leap 15.5 +1 more 5.7-150400.3.12.1

suse advisories SUSE-SU-2023:4384-1SUSE-SU-2023:4381-1SUSE-SU-2023:4380-1

  • squid openSUSE Tumbleweed 6.4-1.1

opensuse advisories openSUSE-SU-2024:13398-1

  • squid AlmaLinux 9 7:5.5-6.el9_3.1
  • squid AlmaLinux 9 7:5.5-5.el9_2.1

almalinux advisories ALSA-2023:6748ALSA-2023:6266

  • squid Rocky Linux 9 7:5.5-5.el9_2.1

rocky linux advisories RLSA-2023:6266

  • squid Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 6.4-r0

alpine advisories ALPINE-CVE-2023-46848

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

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-2023-46848 updated cvss 8.6

squid: denial of Service in FTP

  • Red Hat Enterprise Linux AppStream (v. 9) squid 5.5-5.el9_2.1, squid 5.5-6.el9_3.1
    fixed: vendor fix RHSA-2023:6266
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) squid 5.2-1.el9_0.3
    fixed: vendor fix RHSA-2023:6268
  • Red Hat Enterprise Linux 6 squid Red Hat Enterprise Linux 7 squid, squid-sysvinit, squid-migration-script Red Hat Enterprise Linux 8 squid, libecap
    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

Exploit prediction

11.38% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8

Classification

Weakness
  • CWE-681 Incorrect Conversion between Numeric Types

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.