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TI-2023-25307 Aliases CVE-2023-46848

Squid: denial of service in ftp

Priority MEDIUM 51CWE-681Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

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.

Why it matters now

EPSS 0.11376 96th percentileScored 2026-11-07
Fix Fixed squid: 6.4Red Hat: 3 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—squid5.0.3 to before 6.46.4Patch availableCNA
Red HatRed Hat Enterprise Linux 9—7:5.5-5.el9_2.1Patch availableCNA
Red HatRed Hat Enterprise Linux 9—7:5.5-6.el9_3.1Patch availableCNA
Red HatRed Hat Enterprise Linux 9.0 Extended Update Support—7:5.2-1.el9_0.3Patch availableCNA
Red HatRed Hat Enterprise Linux 6——Not affectedCNA
Red HatRed Hat Enterprise Linux 7——Not affectedCNA
Red HatRed Hat Enterprise Linux 8——Not affectedCNA
  • squid Vendor— Affected 5.0.3 to before 6.4 Fixed in 6.4 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 7:5.5-5.el9_2.1 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 7:5.5-6.el9_3.1 Patch available CNA
  • Red Hat Enterprise Linux 9.0 Extended Update Support VendorRed Hat Affected — Fixed in 7:5.2-1.el9_0.3 Patch available CNA
  • Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — Not affected CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*5.0.3 to before 6.4Vulnerablesquid-cache
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*9.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_eus:9.2:*:*:*:*:*:*:*9.2VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:9.2:*:*:*:*:*:*:*9.2VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:9.2:*:*:*:*:*:*:*9.2VulnerableRed Hat
  • cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* Versions 5.0.3 to before 6.4 Vulnerable ·squid-cache
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_eus:9.2:*:*:*:*:*:*:* Versions 9.2 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:9.2:*:*:*:*:*:*:* Versions 9.2 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:9.2:*:*:*:*:*:*:* Versions 9.2 Vulnerable ·Red Hat

Remediation

  • Fix · CNA squid Fixed in 6.4

Red Hat 3 advisories

  • RHSA-2023:6748 Released 2023-11-07 · Red Hat rating Critical
    squid security update
    • Red Hat Enterprise Linux AppStream (v. 9) squid-7:5.5-6.el9_3.1
  • RHSA-2023:6268 Released 2023-11-02 · Red Hat rating Critical
    squid security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) squid-7:5.2-1.el9_0.3
  • RHSA-2023:6266 Released 2023-11-02 · Red Hat rating Critical
    squid security update
    • Red Hat Enterprise Linux AppStream (v. 9) squid-7:5.5-5.el9_2.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 and 3 more products — RHSA-2023:6266

    3 records Highest priority Priority HIGH 1 HIGH, 2 MEDIUM

    Other records, highest priority first

    • TI-2023-25306 Squid: denial of service in http digest authenticationPriority HIGH 77
    • TI-2023-25305 Squid: request/response smuggling in http/1.1 and icapPriority MEDIUM 56
    Show all 3 records → Advisory →
  • Advisory ·

    Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 and 3 more products — RHSA-2023:6268

    3 records Highest priority Priority HIGH 1 HIGH, 2 MEDIUM

    Other records, highest priority first

    • TI-2023-25306 Squid: denial of service in http digest authenticationPriority HIGH 77
    • TI-2023-25305 Squid: request/response smuggling in http/1.1 and icapPriority MEDIUM 56
    Show all 3 records → Advisory →
Show 1 more group
  • Advisory ·

    Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 and 3 more products — RHSA-2023:6748

    3 records Highest priority Priority HIGH 1 HIGH, 2 MEDIUM

    Other records, highest priority first

    • TI-2023-25306 Squid: denial of service in http digest authenticationPriority HIGH 77
    • TI-2023-25305 Squid: request/response smuggling in http/1.1 and icapPriority MEDIUM 56
    Show all 3 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:6266, RHSA-2023:6748
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2023:6268
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-46848

References

Advisory 5

Other 1

  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-10530 Code injection in [UNKNOWN] RichFaces KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
See all 1955 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences