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CVE-2020-8450

64
FAUCET Score

CVE-2020-8450 describes a buffer overflow vulnerability in Squid versions prior to 4.10, specifically impacting instances configured as a reverse proxy, and affecting products from Canonical, Debian, FedoraProject, openSUSE, and squid-cache. With a CVSS score of 7.3 (HIGH), this vulnerability is remotely exploitable with low attack complexity, potentially leading to limited impact on confidentiality, integrity, and availability. While the FAUCET Risk Score is high at 96/100, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.10CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
19.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
15.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.3HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
71.79%
Probability of exploitation in next 30 days
EPSS Percentile
99.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.7179 is in the 99th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: squid-7:3.5.20-17.el7_9.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: squid:4-8030020200828070549.30b713e6
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: squid

Vendor Advisories (1)

redhatCVE-2020-8450Moderate

squid: Buffer overflow in reverse-proxy configurations

Feb 3, 2020

References

lists.opensuse.org / opensuse-security-announce/2020-03/msg00012.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-05/msg00010.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2020/07/msg00009.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/G6W2IQ7QV2OGREFFUBNVZIDD3RJBDE4R
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/TSU6SPANL27AGK5PCGBJOKG4LUWA555J
security.gentoo.org / glsa/202003-34
Third Party Advisory
security.netapp.com / advisory/ntap-20210304-0002
Third Party Advisory
usn.ubuntu.com / 4289-1
Third Party Advisory
debian.org / security/2020/dsa-4682
Third Party Advisory
squid-cache.org / Advisories/SQUID-2020_1.txt
Vendor Advisory
squid-cache.org / Versions/v3/3.5/changesets/SQUID-2020_1.patch
PatchVendor Advisory
squid-cache.org / Versions/v3/3.5/changesets/squid-3.5-8e657e835965c3a011375feaa0359921c5b3e2dd.patch
PatchVendor Advisory
squid-cache.org / Versions/v4/changesets/SQUID-2020_1.patch
PatchVendor Advisory
squid-cache.org / Versions/v4/changesets/squid-4-b3a0719affab099c684f1cd62b79ab02816fa962.patch
PatchVendor Advisory
squid-cache.org / Versions/v4/changesets/squid-4-d8e4715992d0e530871519549add5519cbac0598.patch
PatchVendor Advisory