Cachewarp

Vulnerability Profile Updated a month ago
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CacheWarp, a significant vulnerability (CVE-2023-20592) in software design and implementation, was disclosed on November 14. This flaw allows malicious actors to exploit AMD Secure Encrypted Virtualization (SEV)-protected virtual machines (VMs) to escalate privileges and gain remote code execution. The vulnerability affects first through third-generation EPYC processors, excluding the fourth generation. On the same day of the disclosure, AMD released a microcode patch for third-generation EPYC chips to address the issue. The exploitation of CacheWarp enables attackers to manipulate return addresses on the stack, altering the control flow of a targeted program. Additionally, it can be used to undo data modifications, fooling the system into believing it has an outdated status. The vulnerability was found in the INVD instruction, which could lead to a loss of SEV-ES and SEV-SNP guest VM memory integrity, according to an AMD security advisory. A research team led by Michael Schwarz from the CISPA Helmholtz Centre for Information Security published an academic paper on the vulnerability, titled "CacheWarp: Software-based fault injection using selective state reset," which has been accepted for the USENIX Security conference 2024. They also created a dedicated website to provide information on CacheWarp and shared video demos demonstrating how it can be used to gain root privileges or bypass OpenSSH authentication.
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CVE-2023-20592
2
CVE-2023-20592, also known as CacheWarp, is a significant software vulnerability discovered in AMD processors. This flaw in the design or implementation of the software allows malicious actors to break into AMD Secure Encrypted Virtualization (SEV) protected virtual machines (VMs), thereby escalatin
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amd
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Openssh
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meltdownUnspecified
1
Meltdown is a significant vulnerability in software design and implementation that was first discovered back in 2018. It, along with Spectre, posed a threat to virtually every modern microprocessor, exposing confidential user data to potential hackers. These vulnerabilities led to widespread concern
SpectreUnspecified
1
Spectre, a significant software vulnerability, has resurfaced in the form of Spectre-BHB (branch history injection), impacting the new hardware AmpereOne. This vulnerability was initially identified in 2018 when Intel was grappling with similar threats such as Meltdown and Spectre. The flaw exists d
Source Document References
Information about the Cachewarp Vulnerability was read from the documents corpus below. This display is limited to 20 results, create a free account to see more
SourceCreatedAtTitle
CERT-EU
7 months ago
New CPU vulnerability extends to virtual machine environments
CERT-EU
7 months ago
AMD SEV OMG: Trusted execution undone by cache meddling
DARKReading
7 months ago
'CacheWarp' AMD VM Bug Opens the Door to Privilege Escalation
CERT-EU
7 months ago
New CacheWarp AMD CPU attack lets hackers gain root in Linux VMs
CERT-EU
7 months ago
CacheWarp Attack: New Vulnerability in AMD SEV Exposes Encrypted VMs
CERT-EU
7 months ago
Reptar: New Intel CPU Vulnerability Impacts Multi-Tenant Virtualized Environments
CERT-EU
7 months ago
New Reptar CPU flaw impacts Intel desktop and server systems