Resource Exhaustion Affecting kernel-core package, versions <0:5.14.0-284.36.1.el9_2
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Test your applications- Snyk ID SNYK-RHEL9-KERNELCORE-7850427
- published 29 Aug 2024
- disclosed 2 Aug 2023
Introduced: 2 Aug 2023
CVE-2023-29409 Open this link in a new tabHow to fix?
Upgrade RHEL:9 kernel-core to version 0:5.14.0-284.36.1.el9_2 or higher.
This issue was patched in RHSA-2023:5009.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-core package and not the kernel-core package as distributed by RHEL.
See How to fix? for RHEL:9 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2023-29409
- https://go.dev/cl/515257
- https://go.dev/issue/61460
- https://groups.google.com/g/golang-announce/c/X0b6CsSAaYI/m/Efv5DbZ9AwAJ
- https://pkg.go.dev/vuln/GO-2023-1987
- https://security.netapp.com/advisory/ntap-20230831-0010/
- https://security.gentoo.org/glsa/202311-09