CVE-2024-25111

SQUID-2024:1 Denial of Service in HTTP Chunked Decoding

HIGH
7.5
CVSS Score
Published: March 6, 2024 at 06:14 PM UTC
Updated: June 17, 2026 at 07:15 AM UTC
4 products affected across 3 vendorsFedoraSquidBluexp

Using squid by squid-cache?

Get instant alerts when new vulnerabilities affect squid - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH7.5
Exploit prediction
EPSS 65%
SSVC
PoC

Description

Squid is a web proxy cache. Starting in version 3.5.27 and prior to version 6.8, Squid may be vulnerable to a Denial of Service attack against HTTP Chunked decoder due to an uncontrolled recursion bug. This problem allows a remote attacker to cause Denial of Service when sending a crafted, chunked, encoded HTTP Message. This bug is fixed in Squid version 6.8. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. There is no workaround for this issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
v < 6.83.5.27 ≤ v < 6.83.5.27
Affected range stops below 6.8, so it looks safe — our inference, not a vendor statement
v < 6.83.5.27 ≤ v < 6.83.5.27
Affected range stops below 6.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-674

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card