CVE-2020-8450 in the critical feed json
An issue was discovered in Squid before 4.10.
published 2020-02-04 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29316
- cvss
- 7.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 71.8%
- EPSS 71.8% chance of exploitation in 30 days, percentile 99.4%
- public exploits
- 0
- none known
Summary
An issue was discovered in Squid before 4.10. Due to incorrect buffer management, a remote client can cause a buffer overflow in a Squid instance acting as a reverse proxy.
Patch / fix
- squid-cache squid 4.10
- squid Debian 14, Debian 13, Debian 12 4.10-1
debian advisories DEBIAN-CVE-2020-8450
- squid Ubuntu 20.04 LTS 4.9-2ubuntu4
- squid3 Ubuntu 16.04 LTS 3.5.12-1ubuntu7.10
- squid3 Ubuntu 18.04 LTS 3.5.27-1ubuntu1.5
ubuntu advisories UBUNTU-CVE-2020-8450
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 7 7:3.5.20-17.el7_9.4
- squid-sysvinit RHEL 7 7:3.5.20-17.el7_9.4
- squid-migration-script RHEL 7 7:3.5.20-17.el7_9.4
- squid RHEL 8 7:4.11-3.module+el8.3.0+7851+7808b5f9
- libecap RHEL 8 1.0.1-2.module+el8.1.0+4044+36416a77
red hat advisories RHSA-2020:4082RHSA-2020:4743
- squid3 SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 3.1.23-8.16.37.12.1
- squid SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES for SAP 12 SP2 +10 more 3.5.21-26.20.1
- squid SLE Module for Server Applications 15 SP1 4.10-5.14.1
- squid SLES for SAP 12 SP5, SLES 12 SP5 4.10-4.6.1
suse advisories SUSE-SU-2020:14460-1SUSE-SU-2020:0661-1SUSE-SU-2020:0493-1SUSE-SU-2020:0487-1
- squid openSUSE Leap 15.1 4.10-lp151.2.14.1
- squid openSUSE Leap 15.1 4.10-lp151.2.11.1
opensuse advisories openSUSE-SU-2020:0606-1openSUSE-SU-2020:0307-1
- libecap AlmaLinux 8 1.0.1-2.module_el8.6.0+2741+01592ae8
almalinux advisories ALSA-2020:4743
- libecap Rocky Linux 8 1.0.1-2.module+el8.4.0+404+316a0dc5
rocky linux advisories RLSA-2020:4743
- squid Alpine 3.24, Alpine 3.23, Alpine 3.22 +13 more 4.10-r0
- squid Alpine 3.8 3.5.27-r4
alpine advisories ALPINE-CVE-2020-8450
Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- squid-cache.org/Versions/v4/changesets/squid-4-d8e4715992d0e530871519549ad… patch
- squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-8e657e835965c3a011375… patch
- squid-cache.org/Versions/v4/changesets/squid-4-b3a0719affab099c684f1cd62b7… patch
- squid-cache.org/Versions/v4/changesets/SQUID-2020_1.patch patch
- squid-cache.org/Versions/v3/3.5/changesets/SQUID-2020_1.patch patch
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-2020-8450 updated cvss 5.9
squid: Buffer overflow in reverse-proxy configurations
-
Red Hat Enterprise Linux 6 squid, squid34affected: no fix planned “Out of support scope”
-
Red Hat Enterprise Linux AppStream (v. 8) squid 4.11-3.module+el8.3.0+7851+7808b5f9, libecap 1.0.1-2.module+el8.1.0+4044+36416a77fixed: vendor fix RHSA-2020:4743
-
Red Hat Enterprise Linux Server (v. 7) squid 3.5.20-17.el7_9.4, squid-migration-script 3.5.20-17.el7_9.4 Red Hat Enterprise Linux Server Optional (v. 7) squid-sysvinit 3.5.20-17.el7_9.4 Red Hat Enterprise Linux Workstation (v. 7) squid 3.5.20-17.el7_9.4, squid-migration-script 3.5.20-17.el7_9.4 Red Hat Enterprise Linux Workstation Optional (v. 7) squid-sysvinit 3.5.20-17.el7_9.4fixed: vendor fix RHSA-2020:4082
-
Red Hat Enterprise Linux 5 squidnot 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
71.79% chance of exploitation in the next 30 days, higher than 99.4% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
References
-
squid-cache.org
/Versions/v4/changesets/squid-4-d8e4715992d0e530871519549add5519cbac0598.patch
patch, vendor-advisory
-
squid-cache.org
/Versions/v3/3.5/changesets/squid-3.5-8e657e835965c3a011375feaa0359921c5b3e2dd.patch
patch, vendor-advisory
-
squid-cache.org
/Versions/v4/changesets/squid-4-b3a0719affab099c684f1cd62b79ab02816fa962.patch
patch, vendor-advisory
-
squid-cache.org
/Versions/v4/changesets/SQUID-2020_1.patch
patch, vendor-advisory
-
squid-cache.org
/Versions/v3/3.5/changesets/SQUID-2020_1.patch
patch, vendor-advisory
-
usn.ubuntu.com
/4289-1/
vendor-advisory, third-party-advisory
-
lists.opensuse.org
/opensuse-security-announce/2020-03/msg00012.html
vendor-advisory, mailing-list, third-party-advisory
-
security.gentoo.org
/glsa/202003-34
vendor-advisory, third-party-advisory
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/G6W2IQ7QV2OGREFFUBNVZIDD3RJBDE4R/
vendor-advisory
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/TSU6SPANL27AGK5PCGBJOKG4LUWA555J/
vendor-advisory
-
lists.opensuse.org
/opensuse-security-announce/2020-05/msg00010.html
vendor-advisory, mailing-list, third-party-advisory
-
debian.org
/security/2020/dsa-4682
vendor-advisory, third-party-advisory
-
squid-cache.org
/Advisories/SQUID-2020_1.txt
vendor-advisory
-
lists.debian.org
/debian-lts-announce/2020/07/msg00009.html
mailing-list, third-party-advisory
-
security.netapp.com
/advisory/ntap-20210304-0002/
third-party-advisory
Sources
- CVE List CVE-2020-8450
- NVD CVE-2020-8450
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.