Bug 1227422 (CVE-2024-39920)

Summary: VUL-0: CVE-2024-39920: kernel: TCP: SnailLoad timing side channel in TCP
Product: [Novell Products] SUSE Security Incidents Reporter: SMASH SMASH <smash_bz>
Component: IncidentsAssignee: Kernel Bugs <kernel-bugs>
Status: NEW --- QA Contact: Security Team bot <security-team>
Severity: Normal    
Priority: P3 - Medium CC: jlee, mkoutny, mkubecek, rfrohl, security-team
Version: unspecifiedFlags: mkoutny: needinfo? (security-team)
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/412754/
Whiteboard: CVSSv3.1:SUSE:CVE-2024-39920:5.9:(AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description SMASH SMASH 2024-07-05 07:05:25 UTC 
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:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-39920
https://www.cve.org/CVERecord?id=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
https://bugzilla.redhat.com/show_bug.cgi?id=2295326