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golang: net/http/httputil: ReverseProxy forwards connection headers if first one is empty

🗓️ 13 Dec 2021 15:29:11Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 3 Views

Go ReverseProxy forwards a first connection header when empty, allowing attackers to drop arbitrary headers and threaten data integrity.

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Refs
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ibm		Security Bulletin: Operations Dashboard is vulnerable to multiple Go vulnerabilities
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ibm		Security Bulletin: IBM Watson Discovery for IBM Cloud Pak for Data affected by vulnerability in Go
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15 Oct 202113:05
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21 Dec 202117:45
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22 Apr 202214:45
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ibm		Security Bulletin: IBM Cloud Pak for Multicloud Management Monitoring has multiple vulnerabilities associated with the Go runtime (CVE-2021-29923, CVE-2021-31525, CVE-2021-33194, CVE-2021-33195, CVE-2021-33196, CVE-2021-33197, CVE-2021-33198)
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ibm		Security Bulletin: Vulnerabilities in Golang Go may affect IBM Spectrum Protect Server (CVE-2021-33195, CVE-2021-33197, CVE-2021-36221)
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ibm		Security Bulletin: Netcool Operations Insight v1.6.6 contains fixes for multiple security vulnerabilities.
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Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8ppc64lemcg5.9.0-28.61dcf87.5.9.el8mcg-5.9.0-28.61dcf87.5.9.el8.ppc64le.rpm
Red Hat Enterprise Linux8s390xmcg5.9.0-28.61dcf87.5.9.el8mcg-5.9.0-28.61dcf87.5.9.el8.s390x.rpm
Red Hat Enterprise Linux8x86_64mcg5.9.0-28.61dcf87.5.9.el8mcg-5.9.0-28.61dcf87.5.9.el8.x86_64.rpm

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28 Jun 2026 12:35Current
7.2High risk
Vulners AI Score7.2
CVSS 24.3
CVSS 3.15.3
EPSS0.02279
CWE-20
Go languageReverse Proxy flawHeader droppingConnection headersIntegrity risk
3