CVE-2024-25617VulnerabilityPublished 1 Mar 2024Updated 26 Jun 2026

Red Hat Security Advisory: squid security update

Affects Red HatSource GCVE Database

Not known to be exploited · 88% EPSS.

Data as of 25 Oct 2026, 19:02 UTC

Exploit forecast

Likely to be exploited

88.0% EPSS · High severity · No CVSS score from NVD or the CNA

EPSS: 88.0% chance of exploitation in 30 days – higher than 99% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
CVE published 1 Mar 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Red Hatredhat/squid`pkg:rpm/redhat/squid`Other threats	Affected =5.5-5.el9_2.5	Fixed in–

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AI-suggested

Red Hat has released an official security update for Squid (version 5.5-5.el9_2.5) that fixes this vulnerability. Users of affected Red Hat Enterprise Linux 9.2 Extended Update Support and related variants should apply the update promptly. The update process will automatically restart the Squid service. Refer to Red Hat's advisory RHSA-2024:1184 and the article https://access.redhat.com/articles/11258 for detailed update instructions. No additional mitigation steps are required beyond applying the official patch.

Description

Squid is a high-performance proxy caching server for web clients, supporting FTP, and HTTP data objects. Security Fix(es): * squid: denial of service in HTTP header parser (CVE-2024-25617) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Impact

The vulnerability allows an attacker to cause a denial of service in the Squid proxy server by exploiting the HTTP header parser. This could disrupt proxy services relying on Squid, impacting availability. No known exploits in the wild have been reported. The issue affects multiple architectures and variants of Red Hat Enterprise Linux 9.2 Extended Update Support. The severity is rated as important by Red Hat, indicating a significant impact on service availability if exploited.

Summary

CVE-2024-25617 is a denial of service vulnerability in the HTTP header parser component of Squid proxy server. Red Hat Product Security has released an update for Squid in Red Hat Enterprise Linux 9.2 Extended Update Support and related product variants to fix this issue. The advisory RHSA-2024:1184 details the fix and affected products. The vulnerability could allow an attacker to cause a denial of service condition by sending crafted HTTP headers to the Squid server. The update to Squid version 5.5-5.el9_2.5 addresses this flaw and is available through Red Hat's update channels.

CWE-182Collapse of Data into Unsafe Value (opens in a new tab)
Base weakness
The product filters data in a way that causes it to be reduced or "collapsed" into an unsafe value that violates an expected security property.
Architecture and Design · Input Validation
Avoid making decisions based on names of resources (e.g. files) if those resources can have alternate names.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
Implementation · Input Validation
Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174).
OWASP Cheat Sheets
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V1.5.1 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Jun 2026, 13:41 UTC

WeaknessesCWE-182

Technical details

References

Community reviews

Related threats