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CVE-2023-49285

69
FAUCET Score

CVE-2023-49285 is a Denial of Service vulnerability affecting Squid caching proxy versions prior to 6.5, caused by a Buffer Overread bug during HTTP message processing. With a CVSS score of 7.5 (High), this vulnerability can be exploited remotely with low attack complexity, leading to service disruption. There are no known workarounds, and users are advised to upgrade immediately. Currently, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.4CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
88.82%
Probability of exploitation in next 30 days
EPSS Percentile
99.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.8882 is in the 100th 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 (14)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: squid-7:3.5.20-17.el7_9.10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: squid:4-8090020231207155957.a75119d5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: squid:4-8020020240122164331.4cda2c84
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceFixed in: squid:4-8020020240122164331.4cda2c84
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsFixed in: squid:4-8020020240122164331.4cda2c84
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportFixed in: squid:4-8040020240122165847.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceFixed in: squid:4-8040020240122165847.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsFixed in: squid:4-8040020240122165847.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: squid:4-8060020231222131040.ad008a3a
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: squid:4-8080020231222130009.63b34585
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: squid-7:5.5-6.el9_3.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: squid-7:5.2-1.el9_0.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: squid-7:5.5-5.el9_2.3
View patch

Vendor Advisories (1)

redhatCVE-2023-49285Important

squid: Buffer over-read in the HTTP Message processing feature

Dec 4, 2023

References

github.com / squid-cache/squid/commit/77b3fb4df0f126784d5fd4967c28ed40eb8d521b
Patch
github.com / squid-cache/squid/commit/deee944f9a12c9fd399ce52f3e2526bb573a9470
Patch
github.com / squid-cache/squid/security/advisories/GHSA-8w9r-p88v-mmx9
Vendor Advisory
lists.debian.org / debian-lts-announce/2024/01/msg00003.html
lists.fedoraproject.org / archives/list/[email protected]/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS
lists.fedoraproject.org / archives/list/[email protected]/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC
security.netapp.com / advisory/ntap-20240119-0004
squid-cache.org / Versions/v5/SQUID-2023_7.patch
Broken Link
squid-cache.org / Versions/v6/SQUID-2023_7.patch
Broken Link