Denial of Service in HTTP Collapsed Forwarding in Squid
CVE-2023-49288

8.6HIGH

Key Information:

Vendor

Squid-cache

Status
Squid
Vendor
CVE Published:
4 December 2023

What is CVE-2023-49288?

The Squid caching proxy is affected by a Use-After-Free vulnerability that can enable a Denial of Service attack when 'collapsed_forwarding' is enabled. This issue impacts all Squid versions from 3.5 up to and including 5.9. Users with 'collapsed_forwarding on' configuration are at risk, but those with 'collapsed_forwarding off' or lacking this directive are not vulnerable. It is recommended that users upgrade to Squid version 6.0.1 immediately to mitigate this vulnerability. Alternatively, users unable to upgrade should edit their squid.conf to remove any 'collapsed_forwarding' settings.

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Affected Version(s)

squid >= 3.5, < 6.0.1

References

https://github.com/squid-cache/squid/security/advisories/...
x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/package-ann...
https://lists.fedoraproject.org/archives/list/package-ann...

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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