CVE-2023-29409
Large RSA keys can cause high CPU usage in crypto/tls
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
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.
A denial of service vulnerability was found in the Golang Go package caused by an uncontrolled resource consumption flaw. By persuading a victim to use a specially crafted certificate with large RSA keys, a remote attacker can cause a client/server to expend significant CPU time verifying signatures, resulting in a denial of service condition.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2023-04-05 CVE Reserved
- 2023-08-02 CVE Published
- 2023-08-21 First Exploit
- 2024-10-22 CVE Updated
- 2024-11-06 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-400: Uncontrolled Resource Consumption
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://security.gentoo.org/glsa/202311-09 |
|
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| https://security.netapp.com/advisory/ntap-20230831-0010 |
|
| URL | Date | SRC |
|---|---|---|
| https://github.com/mateusz834/CVE-2023-29409 | 2023-08-21 |
| URL | Date | SRC |
|---|---|---|
| https://go.dev/cl/515257 | 2023-11-25 | |
| https://go.dev/issue/61460 | 2023-11-25 | |
| https://pkg.go.dev/vuln/GO-2023-1987 | 2023-11-25 |
| URL | Date | SRC |
|---|---|---|
| https://groups.google.com/g/golang-announce/c/X0b6CsSAaYI/m/Efv5DbZ9AwAJ | 2023-11-25 | |
| https://access.redhat.com/security/cve/CVE-2023-29409 | 2024-05-22 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2228743 | 2024-05-22 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Golang Search vendor "Golang" | Go Search vendor "Golang" for product "Go" | < 1.19.12 Search vendor "Golang" for product "Go" and version " < 1.19.12" | - |
Affected
| ||||||
| Golang Search vendor "Golang" | Go Search vendor "Golang" for product "Go" | >= 1.20.0 < 1.20.7 Search vendor "Golang" for product "Go" and version " >= 1.20.0 < 1.20.7" | - |
Affected
| ||||||
| Golang Search vendor "Golang" | Go Search vendor "Golang" for product "Go" | 1.21.0 Search vendor "Golang" for product "Go" and version "1.21.0" | rc1 |
Affected
| ||||||
| Golang Search vendor "Golang" | Go Search vendor "Golang" for product "Go" | 1.21.0 Search vendor "Golang" for product "Go" and version "1.21.0" | rc2 |
Affected
| ||||||
| Golang Search vendor "Golang" | Go Search vendor "Golang" for product "Go" | 1.21.0 Search vendor "Golang" for product "Go" and version "1.21.0" | rc3 |
Affected
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