Resource Exhaustion Affecting falco package, versions <0.37.1-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.16% (53rd percentile)

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  • Snyk IDSNYK-WOLFILATEST-FALCO-6354311
  • published1 Mar 2024
  • disclosed2 Aug 2023

Introduced: 2 Aug 2023

CVE-2023-29409  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade Wolfi falco to version 0.37.1-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream falco package and not the falco package as distributed by Wolfi. See How to fix? for Wolfi 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.

CVSS Scores

version 3.1