Covert Timing Channel Affecting kernel-core package, versions *
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Test your applications- Snyk ID SNYK-RHEL9-KERNELCORE-7420622
- published 4 Jul 2024
- disclosed 3 Jul 2024
Introduced: 3 Jul 2024
CVE-2024-39920 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:9 kernel-core.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-core package and not the kernel-core package as distributed by RHEL.
See How to fix? for RHEL:9 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2024-39920
- 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