Security readout for executives and security teams
CVE-2016-4555 is a denial-of-service flaw in Squid. A remote web server can send a specially crafted ESI response that may crash the Squid proxy. The business impact is service disruption for users or applications depending on Squid for web access or caching. Exposure is most likely where Squid is deployed as a forward or caching proxy and retrieves content from untrusted or internet-hosted servers. Systems running Squid 3.x before 3.5.18 or 4.x before 4.0.10 should be treated as potentially affected. Prioritize remediation for internet-facing or business-critical proxy infrastructure. The issue is not documented here as data theft or code execution, but a proxy crash can interrupt web access, application traffic, and dependent services. Mitigation focus: Upgrade Squid to 3.5.18, 4.0.10, or a vendor-fixed package.; Apply the Squid SQUID-2016_9 patch if maintaining source builds.; Use Debian, Ubuntu, Red Hat, SUSE, Gentoo, or Oracle advisories for package-specific guidance..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2016-4555 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- GLSA-201607-01CVE reference · vendor-advisory, x_refsource_GENTOO
- RHSA-2016:1140CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2016:1139CVE reference · vendor-advisory, x_refsource_REDHAT
Products and packages named in the record
CWE details
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