7.5

CVE-2023-46728: squid-cache squid NULL Pointer Dereference

CVSS: 7.5v3.1HighModified
AliasesSUSE-SU-2023:4544-1SUSE-SU-2023:4545-1SUSE-SU-2023:4589-1
Published 06-11-2023Last modified 03-11-2025
Open JSON

Vulnerability summary

CVE-2023-46728 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in squid-cache squid. EPSS estimates a 5.96% chance of exploitation in the next 30 days, higher than 93.1% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
5.96%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 2
DLA-4312-1RHSA-2024:0046RHSA-2024:0071RHSA-2024:0072RHSA-2024:0397RHSA-2024:0771

Timeline

  1. 06-11-2023
    PublishedVulnerability first disclosed.
  2. 03-11-2025
    Last modifiedVulnerability information updated.

Description

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

5.96%

Chance of exploitation in the next 30 days

Percentile

93%

Versus all other CVEs

30-day change

0.00 pp

From 5.96% on 18-09-2026

18-09-202618-10-2026
EPSS score
5.96%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse15 products
  • squid&distro=SUSE Enterprise Storage 7.1< 4.17-150000.5.41.1
  • squid&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS< 4.17-150000.5.41.1
  • squid&distro=SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS< 4.17-150000.5.41.1
  • squid&distro=SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS< 4.17-150000.5.41.1
  • squid&distro=SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS< 4.17-150000.5.41.1
Opensuse2 products
  • squid&distro=openSUSE Leap 15.4< 5.7-150400.3.15.1
  • squid&distro=openSUSE Leap 15.5< 5.7-150400.3.15.1
Ubuntu2 products
  • squid< 4.10-1ubuntu1.8 | < 5.7-0ubuntu0.22.04.2
  • squid3< 3.5.12-1ubuntu7.16+esm2 | < 3.5.27-1ubuntu1.14+esm1
Debian1 product
  • squid< 5.7-2+deb12u5 | < 6.1-1
Squid-cache1 product

5 vendors · 21 products

References

18 links
Show all 18 references