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CVE-2023-46847

Squid: denial of service in http digest authentication

CVSS 3.1 High 8.6

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Description

Squid is vulnerable to a Denial of Service, where a remote attacker can perform buffer overflow attack by writing up to 2 MB of arbitrary data to heap memory when Squid is configured to accept HTTP Digest Authentication.

Official description from the CVE record, published by redhat. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org

Key data

CVSS 3.1 High 8.6

Score published by redhat in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

  • Attack vector: Network

    The vulnerable component can be reached over a network, possibly from the Internet.

  • Attack complexity: Low

    No special conditions are needed. The attack can be repeated at will.

  • Privileges required: None

    No account or privileges are needed.

  • User interaction: None

    No action from any user is needed.

  • Scope: Unchanged

    The impact stays within the vulnerable component.

  • Confidentiality impact: Low

    Limited effect on the secrecy of data.

  • Integrity impact: Low

    Limited effect on the trustworthiness of data.

  • Availability impact: High

    Serious or total effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.
Score
0.78513 (78.5% probability)
Percentile
99.6%
Scores of
Nov 10, 2026
Model
v2026.06.15

Weakness (CWE)

CWE catalog version 5.0.
CWE names: Copyright © 2006-2026, The MITRE Corporation. See /security/cve/legal for the CWE license.
  • CWE-120Buffer Copy without Checking Size of Input

Affected products

Products listed in the CVE record, as the CNA published them.

  • squid

    • affected: 3.2.0.1 up to before 6.4

  • Red Hat Enterprise Linux 6 Extended Lifecycle Support

    • unaffected: 7:3.4.14-15.el6_10.1 up to before *

  • Red Hat Enterprise Linux 6 Extended Lifecycle Support

    • unaffected: 7:3.1.23-24.el6_10.1 up to before *

  • Red Hat Enterprise Linux 7

    • unaffected: 7:3.5.20-17.el7_9.9 up to before *

  • Red Hat Enterprise Linux 7.6 Advanced Update Support

    • unaffected: 7:3.5.20-12.el7_6.2 up to before *

  • Red Hat Enterprise Linux 7.7 Advanced Update Support

    • unaffected: 7:3.5.20-13.el7_7.1 up to before *

  • Red Hat Enterprise Linux 8

    • unaffected: 8080020231030214932.63b34585 up to before *

  • Red Hat Enterprise Linux 8

    • unaffected: 8090020231030224841.a75119d5 up to before *

  • Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions

    • unaffected: 8010020231101141358.c27ad7f8 up to before *

  • Red Hat Enterprise Linux 8.2 Advanced Update Support

    • unaffected: 8020020231101135052.4cda2c84 up to before *

  • Red Hat Enterprise Linux 8.2 Telecommunications Update Service

    • unaffected: 8020020231101135052.4cda2c84 up to before *

  • Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions

    • unaffected: 8020020231101135052.4cda2c84 up to before *

  • Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

    • unaffected: 8040020231101101624.522a0ee4 up to before *

  • Red Hat Enterprise Linux 8.4 Telecommunications Update Service

    • unaffected: 8040020231101101624.522a0ee4 up to before *

  • Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions

    • unaffected: 8040020231101101624.522a0ee4 up to before *

  • Red Hat Enterprise Linux 8.6 Extended Update Support

    • unaffected: 8060020231031165747.ad008a3a up to before *

  • Red Hat Enterprise Linux 9

    • unaffected: 7:5.5-5.el9_2.1 up to before *

  • Red Hat Enterprise Linux 9

    • unaffected: 7:5.5-6.el9_3.1 up to before *

  • Red Hat Enterprise Linux 9.0 Extended Update Support

    • unaffected: 7:5.2-1.el9_0.3 up to before *

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

  1. ID reserved
  2. Record published
  3. Record last updated

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About CubePath

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:51 UTC. Sources and licenses