N/A

CVSS Score

-

CVSS Score

Basic Information

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GHSA-47xh-qxqv-mgvg

GHSA-47xh-qxqv-mgvg: kube-httpcache is vulnerable to Cross-Site Request Forgery (CSRF)

Impact

A request forgery attack can be performed on Varnish Cache servers that have the HTTP/2 protocol turned on. An attacker may introduce characters through the HTTP/2 pseudo-headers that are invalid in the context of an HTTP/1 request line, causing the Varnish server to produce invalid HTTP/1 requests to the backend. This may in turn be used to successfully exploit vulnerabilities in a server behind the Varnish server. -- https://varnish-cache.org/security/VSV00011.html#vsv00011

Patches

This is fixed in Varnish 6.0.11; Varnish 6.0.11 is available in kube-httpcache versions v0.7.1 and later.

Workarounds

See upstream mitigation hints.

References

https://varnish-cache.org/security/VSV00011.html#vsv00011

(GitHub Advisory)

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GHSA-47xh-qxqv-mgvg

GHSA-47xh-qxqv-mgvg:

N/A

CVSS Score

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
github.com/mittwald/kube-httpcache	go	< 0.7.1	0.7.1

Technical Details

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Root Cause Analysis

The vulnerability stems from the underlying Varnish Cache component (specifically versions <6.0.11) which kube-httpcache integrates. The core issue is in Varnish's handling of HTTP/2 pseudo-headers when generating HTTP/1 backend requests, not in kube-httpcache's own Go code. While the Varnish mitigation involves adding checks in the vcl_recv VCL function, this is part of Varnish's configuration rather than a function in kube-httpcache's codebase. The kube-httpcache vulnerability exists because it bundled a vulnerable Varnish version, not due to its own implemented functions. No specific functions within the kube-httpcache Go project were identified as directly vulnerable with high confidence.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

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WAF Protection Rules

WAF Rule

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Reasoning

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