Arbitrary Memory Disclosure through CPU Side-Channel Attacks (Retbleed)
Vulnerability Description
Intel microprocessor generations 6 to 8 are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Johannes Wikner - ETH Zürich
- Kaveh Razavi - ETH Zürich
References
- https://comsec.ethz.ch/retbleed
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00702.html
- http://www.openwall.com/lists/oss-security/2022/07/12/2
- http://www.openwall.com/lists/oss-security/2022/07/12/4
- http://www.openwall.com/lists/oss-security/2022/07/12/5
- http://www.openwall.com/lists/oss-security/2022/07/13/1
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M27MB3QFNIJV4EQQSXWARHP3OGX6CR6K/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D4RW5FCIYFNCQOEFJEUIRW3DGYW7CWBG/
- https://www.debian.org/security/2022/dsa-5207
- https://lists.debian.org/debian-lts-announce/2022/09/msg00011.html
- https://security.netapp.com/advisory/ntap-20221007-0007/
- https://lists.debian.org/debian-lts-announce/2022/12/msg00034.html
- https://www.secpod.com/blog/retbleed-intel-and-amd-processor-information-disclosure-vulnerability/
- https://security.gentoo.org/glsa/202402-07
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