Bug 2295326 (CVE-2024-39920)

Summary: CVE-2024-39920 kernel: TCP: SnailLoad timing side channel in TCP
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the TCP protocol in RFC 9293. The TCP protocol 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.
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Bug Depends On: 2295785    
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Description OSIDB Bzimport 2024-07-03 06:11:11 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.