Vulnerability Description
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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Golang | Go | < 1.19.12 |
Related Weaknesses (CWE)
References
- https://go.dev/cl/515257Patch
- https://go.dev/issue/61460Issue TrackingPatchVendor Advisory
- https://groups.google.com/g/golang-announce/c/X0b6CsSAaYI/m/Efv5DbZ9AwAJMailing ListVendor Advisory
- https://pkg.go.dev/vuln/GO-2023-1987PatchVendor Advisory
- https://security.gentoo.org/glsa/202311-09
- https://security.netapp.com/advisory/ntap-20230831-0010/
- https://go.dev/cl/515257Patch
- https://go.dev/issue/61460Issue TrackingPatchVendor Advisory
- https://groups.google.com/g/golang-announce/c/X0b6CsSAaYI/m/Efv5DbZ9AwAJMailing ListVendor Advisory
- https://pkg.go.dev/vuln/GO-2023-1987PatchVendor Advisory
- https://security.gentoo.org/glsa/202311-09
- https://security.netapp.com/advisory/ntap-20230831-0010/
FAQ
What is CVE-2023-29409?
CVE-2023-29409 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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...
How severe is CVE-2023-29409?
CVE-2023-29409 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-29409?
Check the references section above for vendor advisories and patch information. Affected products include: Golang Go.