Bug 2268118 (CVE-2024-2201)

Summary: CVE-2024-2201 hw: cpu: intel: Native Branch History Injection (BHI)
Product: [Other] Security Response Reporter: Rohit Keshri <rkeshri>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: acaringi, allarkin, aquini, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, gcovolo, hkrzesin, jarod, jburrell, jdenham, jfaracco, jforbes, jlelli, joe.lawrence, jpoimboe, jshortt, jstancek, jwyatt, kcarcia, kgrant, ldoskova, lgoncalv, llong, longman, lzampier, mleitner, mmilgram, mstowell, nmurray, pdwyer, ptalbert, rogbas, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, security-response-team, sidakwo, sukulkar, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in some Intel CPUs where mitigations for the Spectre V2/BHI vulnerability were incomplete. This issue may allow an attacker to read arbitrary memory, compromising system integrity and exposing sensitive information.
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Bug Blocks: 2012088    

Description Rohit Keshri 2024-03-06 10:46:30 UTC 
A native Spectre-v2 exploit against the Linux kernel on last-generation Intel CPUs, based on the recent BHI variant and able to leak arbitrary kernel memory at 3.5 kB/sec. In this flaw a number of gadgets and exploitation techniques to bypass the recent FineIBT mitigation, along with a case study on a 13th Gen Intel CPU that can leak kernel memory at 18 bytes/sec.

Reference:
https://www.openwall.com/lists/oss-security/2024/04/09/15
https://www.vusec.net/projects/native-bhi/
https://download.vusec.net/papers/inspectre_sec24.pdf