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CVE-2023-29409

Large RSA keys can cause high CPU usage in crypto/tls

Extremely large RSA keys in certificate chains can cause a client/server to expend significant CPU time verifying signatures. With fix, the size of RSA keys transmitted during handshakes is restricted to <= 8192 bits. Based on a survey of publicly trusted RSA keys, there are currently only three certificates in circulation with keys larger than this, and all three appear to be test certificates that are not actively deployed. It is possible there are larger keys in use in private PKIs, but we target the web PKI, so causing breakage here in the interests of increasing the default safety of users of crypto/tls seems reasonable.

CVSS 3.1 · 5.3 Medium EPSS 1.6% KEV · Not listed
Vendors
Golang Redhat
Products
Go Ansible Automation Platform Cert Manager and 17 more
CVE-2023-29406

Insufficient sanitization of Host header in net/http

The HTTP/1 client does not fully validate the contents of the Host header. A maliciously crafted Host header can inject additional headers or entire requests. With fix, the HTTP/1 client now refuses to send requests containing an invalid Request.Host or Request.URL.Host value.

CVSS 3.1 · 6.5 Medium EPSS 1.5% KEV · Not listed
Vendors
Golang Redhat
Products
Go Advanced Cluster Security Cryostat and 16 more
CVE-2023-29400

Improper handling of empty HTML attributes in html/template

Templates containing actions in unquoted HTML attributes (e.g. "attr={{.}}") executed with empty input can result in output with unexpected results when parsed due to HTML normalization rules. This may allow injection of arbitrary attributes into tags.

CVSS 3.1 · 7.3 High EPSS 1.0% KEV · Not listed
Vendors
Golang Redhat
Products
Go Acm Advanced Cluster Security and 19 more
CVE-2023-24539

Improper sanitization of CSS values in html/template

Angle brackets (<>) are not considered dangerous characters when inserted into CSS contexts. Templates containing multiple actions separated by a '/' character can result in unexpectedly closing the CSS context and allowing for injection of unexpected HTML, if executed with untrusted input.

CVSS 3.1 · 7.3 High EPSS 1.0% KEV · Not listed
Vendors
Golang Redhat
Products
Go Acm Advanced Cluster Security and 19 more
CVE-2023-24532

Incorrect calculation on P256 curves in crypto/internal/nistec

The ScalarMult and ScalarBaseMult methods of the P256 Curve may return an incorrect result if called with some specific unreduced scalars (a scalar larger than the order of the curve). This does not impact usages of crypto/ecdsa or crypto/ecdh.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Golang Redhat
Products
Go Enterprise Linux Migration Toolkit Applications and 7 more