CVE-2024-39920

CVSS 4.3 MEDIUMEPSS 0.6%CWE-1255

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.3EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

03 Jul 2024Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

The TCP protocol in RFC 9293 has a timing side channel that makes it easier for remote attackers to infer the content of one TCP connection from a client system (to any server), when that client system is concurrently obtaining TCP data at a slow rate from an attacker-controlled server, aka the "SnailLoad" issue. For example, the attack can begin by measuring RTTs via the TCP segments whose role is to provide an ACK control bit and an Acknowledgment Number.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

n/a · n/a

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References

https://github.com/IAIK/SnailLoad https://news.ycombinator.com/item?id=40809629 https://twitter.com/tugraz/status/1805272833322299412 https://www.instagram.com/p/C8wpO1UtExw/https://www.rfc-editor.org/rfc/rfc9293.txt https://www.snailload.com https://www.snailload.com/snailload.pdf https://www.tugraz.at/en/tu-graz/services/news-stories/tu-graz-news/singleview/article/neue-sicherheitsluecke-erlaubt-ueberwachung-besuchter-websites-und-angesehener-videos