Squid: denial of service in http digest authentication
Published Nov 3, 2023
8.6
HIGHCVSS 3.1
EPSS 88.35%
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.
Affected products
No data.
Configuration 1
- ≥ 3.2.0.1 · < 6.4
Configuration 2
- 8.0
- 9.0
- 8.6
- 8.8
- 9.0
- 9.2
- 8.0_aarch64
- 8.0_s390x
- 8.0_ppc64le
- 7.0
- 8.2
- 8.4
- 8.6
- 9.2
- 8.2
- 8.4
- 8.6
- 8.8
- 9.2
- 7.0
No data.
Red Hat Enterprise Linux 6 Extended Lifecycle Support
squid-7:3.1.23-24.el6_10.1
Fixed · RHSA-2023:6884
Red Hat Enterprise Linux 6 Extended Lifecycle Support
squid34-7:3.4.14-15.el6_10.1
Fixed · RHSA-2023:6882
Red Hat Enterprise Linux 7
squid-7:3.5.20-17.el7_9.9
Fixed · RHSA-2023:6805
Red Hat Enterprise Linux 7.6 Advanced Update Support
squid-7:3.5.20-12.el7_6.2
Fixed · RHSA-2023:7578
Red Hat Enterprise Linux 7.7 Advanced Update Support
squid-7:3.5.20-13.el7_7.1
Fixed · RHSA-2023:7576
Red Hat Enterprise Linux 8
squid:4-8080020231030214932.63b34585
Fixed · RHSA-2023:6267
Red Hat Enterprise Linux 8
squid:4-8090020231030224841.a75119d5
Fixed · RHSA-2023:7213
Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions
squid:4-8010020231101141358.c27ad7f8
Fixed · RHSA-2023:6810
Red Hat Enterprise Linux 8.2 Advanced Update Support
squid:4-8020020231101135052.4cda2c84
Fixed · RHSA-2023:6803
Red Hat Enterprise Linux 8.2 Telecommunications Update Service
squid:4-8020020231101135052.4cda2c84
Fixed · RHSA-2023:6803
Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
squid:4-8020020231101135052.4cda2c84
Fixed · RHSA-2023:6803
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
squid:4-8040020231101101624.522a0ee4
Fixed · RHSA-2023:6804
Red Hat Enterprise Linux 8.4 Telecommunications Update Service
squid:4-8040020231101101624.522a0ee4
Fixed · RHSA-2023:6804
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
squid:4-8040020231101101624.522a0ee4
Fixed · RHSA-2023:6804
Red Hat Enterprise Linux 8.6 Extended Update Support
squid:4-8060020231031165747.ad008a3a
Fixed · RHSA-2023:6801
Red Hat Enterprise Linux 9
squid-7:5.5-5.el9_2.1
Fixed · RHSA-2023:6266
Red Hat Enterprise Linux 9
squid-7:5.5-6.el9_3.1
Fixed · RHSA-2023:6748
Red Hat Enterprise Linux 9.0 Extended Update Support
squid-7:5.2-1.el9_0.3
Fixed · RHSA-2023:6268
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 Extended Lifecycle Support | squid-7:3.1.23-24.el6_10.1 | Fixed | RHSA-2023:6884 |
| Red Hat Enterprise Linux 6 Extended Lifecycle Support | squid34-7:3.4.14-15.el6_10.1 | Fixed | RHSA-2023:6882 |
| Red Hat Enterprise Linux 7 | squid-7:3.5.20-17.el7_9.9 | Fixed | RHSA-2023:6805 |
| Red Hat Enterprise Linux 7.6 Advanced Update Support | squid-7:3.5.20-12.el7_6.2 | Fixed | RHSA-2023:7578 |
| Red Hat Enterprise Linux 7.7 Advanced Update Support | squid-7:3.5.20-13.el7_7.1 | Fixed | RHSA-2023:7576 |
| Red Hat Enterprise Linux 8 | squid:4-8080020231030214932.63b34585 | Fixed | RHSA-2023:6267 |
| Red Hat Enterprise Linux 8 | squid:4-8090020231030224841.a75119d5 | Fixed | RHSA-2023:7213 |
| Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions | squid:4-8010020231101141358.c27ad7f8 | Fixed | RHSA-2023:6810 |
| Red Hat Enterprise Linux 8.2 Advanced Update Support | squid:4-8020020231101135052.4cda2c84 | Fixed | RHSA-2023:6803 |
| Red Hat Enterprise Linux 8.2 Telecommunications Update Service | squid:4-8020020231101135052.4cda2c84 | Fixed | RHSA-2023:6803 |
| Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions | squid:4-8020020231101135052.4cda2c84 | Fixed | RHSA-2023:6803 |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | squid:4-8040020231101101624.522a0ee4 | Fixed | RHSA-2023:6804 |
| Red Hat Enterprise Linux 8.4 Telecommunications Update Service | squid:4-8040020231101101624.522a0ee4 | Fixed | RHSA-2023:6804 |
| Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions | squid:4-8040020231101101624.522a0ee4 | Fixed | RHSA-2023:6804 |
| Red Hat Enterprise Linux 8.6 Extended Update Support | squid:4-8060020231031165747.ad008a3a | Fixed | RHSA-2023:6801 |
| Red Hat Enterprise Linux 9 | squid-7:5.5-5.el9_2.1 | Fixed | RHSA-2023:6266 |
| Red Hat Enterprise Linux 9 | squid-7:5.5-6.el9_3.1 | Fixed | RHSA-2023:6748 |
| Red Hat Enterprise Linux 9.0 Extended Update Support | squid-7:5.2-1.el9_0.3 | Fixed | RHSA-2023:6268 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2023–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (28 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 88.35% (0.88351) | 99.77th | v5 (v2026.06.15) |
| Aug 2, 2026 | 88.35% (0.88351) | 99.76th | v5 (v2026.06.15) |
| Jun 15, 2026 | 85.94% (0.85944) | 99.70th | v5 (v2026.06.15) |
| Mar 21, 2026 | 38.21% (0.38209) | 97.18th | v4 (v2025.03.14) |
| Nov 28, 2025 | 45.33% (0.45329) | 97.45th | v4 (v2025.03.14) |
| Nov 22, 2025 | 41.49% (0.41487) | 97.24th | v4 (v2025.03.14) |
| Nov 20, 2025 | 44.74% (0.44737) | 97.42th | v4 (v2025.03.14) |
| Nov 18, 2025 | 85.83% (0.85832) | 99.47th | v4 (v2025.03.14) |
| Oct 11, 2025 | 44.74% (0.44737) | 97.40th | v4 (v2025.03.14) |
| Oct 1, 2025 | 50.11% (0.50113) | 97.76th | v4 (v2025.03.14) |
| Sep 4, 2025 | 52.68% (0.52678) | 97.87th | v4 (v2025.03.14) |
| Aug 9, 2025 | 45.10% (0.45104) | 97.48th | v4 (v2025.03.14) |
| Aug 8, 2025 | 41.85% (0.41853) | 97.30th | v4 (v2025.03.14) |
| Jul 18, 2025 | 44.74% (0.44737) | 97.44th | v4 (v2025.03.14) |
| Jun 15, 2025 | 50.11% (0.50113) | 97.67th | v4 (v2025.03.14) |
| Jun 7, 2025 | 56.24% (0.56239) | 97.95th | v4 (v2025.03.14) |
| Apr 15, 2025 | 51.04% (0.51040) | 97.66th | v4 (v2025.03.14) |
| Mar 30, 2025 | 85.83% (0.85832) | 99.34th | v4 (v2025.03.14) |
| Mar 29, 2025 | 81.55% (0.81545) | 98.95th | v4 (v2025.03.14) |
| Mar 17, 2025 | 85.83% (0.85832) | 99.34th | v4 (v2025.03.14) |
| Dec 17, 2024 | 3.13% (0.03131) | 90.88th | v3 (v2023.03.01) |
| Dec 5, 2024 | 4.18% (0.04181) | 92.51th | v3 (v2023.03.01) |
| Feb 17, 2024 | 3.02% (0.03025) | 90.62th | v3 (v2023.03.01) |
| Dec 14, 2023 | 3.52% (0.03523) | 90.57th | v3 (v2023.03.01) |
| Nov 21, 2023 | 6.23% (0.06229) | 92.82th | v3 (v2023.03.01) |
| Nov 14, 2023 | 3.52% (0.03523) | 90.52th | v3 (v2023.03.01) |
| Nov 9, 2023 | 0.08% (0.00083) | 34.65th | v3 (v2023.03.01) |
| Nov 3, 2023 | 0.10% (0.00096) | 40.05th | v3 (v2023.03.01) |
References (21)
- https://access.redhat.com/errata/RHSA-2023:6266 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:6267 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:6268 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:6748 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:6801 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:6803 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:6804 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:6805 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:6810 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:6882 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:6884 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:7213 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:7576 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2023:7578 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-46847 vdb-entryx_refsource_REDHATThird Party AdvisoryVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2245916 issue-trackingx_refsource_REDHATIssue TrackingThird Party Advisory
- https://github.com/squid-cache/squid/security/advisories/GHSA-phqj-m8gv-cq4g Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html
- https://nvd.nist.gov/vuln/detail/CVE-2023-46847
- https://security.netapp.com/advisory/ntap-20231130-0002/
- https://www.cve.org/CVERecord?id=CVE-2023-46847
Change history (0)
No recorded changes yet.