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prionPRIOn knowledge basePRION:CVE-2023-29409
HistoryAug 02, 2023 - 8:15 p.m.

Code injection

2023-08-0220:15:00
PRIOn knowledge base
www.prio-n.com
13
certificate chains
cpu time
rsa keys
handshakes
test certificates
publicly trusted
private pkis
web pki
crypto/tls
nvd

AI Score

6.3

Confidence

High

EPSS

0.001

Percentile

31.3%

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.