CVE-2022-2529High· 7.5▾ TwilightCloudflare GoFlow vulnerable to a Denial of Service in the sflow packet handling package
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.2 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 9.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.8%
0.8% → 0.9%
The sflow decode package prior to version 3.4.4 does not employ sufficient packet sanitisation which can lead to a denial of service attack. Attackers can craft malformed packets causing the process to consume huge amounts of memory resulting in a denial of service.
github.com/cloudflare/goflow/v3/decoders/sflow
Version 3.4.4 contains patches fixing this.
A possible workaround is to not have your goflow collector publicly reachable.
If you have any questions or comments about this advisory:
github.com/cloudflare/goflow/v3 < 3.4.4Upgrade to a patched release:
github.com/cloudflare/goflow/v3 3.4.4Connected by shared product, vendor, weakness, or advisory.
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