CVE-2023-29409Not scoredCWE-400

CVE-2023-29409: Large RSA keys can cause high CPU usage in crypto/tls

Go standard library · crypto/tls

Vendor fix available · Affected: Go standard library crypto/tls · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

1.6%probability of exploitation in the next 30 days

76th percentile

050100

Higher than 76% of scored CVEs

Not scored yet. The CVE record carries no CVSS score.

DescriptionCVE.org

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.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Go standard library · crypto/tlsbefore 1.19.12; from 1.20.0-0 before 1.20.7; from 1.21.0-0 before 1.21.0-rc.4

On the Atlas

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Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Uncontrolled Resource Consumption · Denial of Service
Vendor: Go standard library
Published: August 2023
Band: Possible (1 to 10%), August 2023

CoverageNo articles yet

No CyberSIXT article names CVE-2023-29409 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.