CVE-2020-8449 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-2020-29315
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 8.3%
- EPSS 8.3% chance of exploitation in 30 days, percentile 94%
- public exploits
- 0
- none known
Summary
An issue was discovered in Squid before 4.10. Due to incorrect input validation, it can interpret crafted HTTP requests in unexpected ways to access server resources prohibited by earlier security filters.
Patch / fix
- squid-cache squid 4.10
- squid Debian 14, Debian 13, Debian 12 4.10-1
debian advisories DEBIAN-CVE-2020-8449
- 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-2020-8449
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 Tumbleweed 4.16-1.5
- 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-2024:11403-1openSUSE-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-2020-8449
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
- squid-cache.org/Advisories/SQUID-2020_1.txt advisory
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-2020-8449 updated cvss 4.8
squid: Improper input validation issues in HTTP Request processing
-
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
8.31% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-668 Exposure of Resource to Wrong Sphere
References
-
squid-cache.org
/Advisories/SQUID-2020_1.txt
patch, vendor-advisory
-
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
-
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-2020-8449
- NVD CVE-2020-8449
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.