Vulnerability Details CVE-2021-33200
kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 10.4%
CVSS Severity
CVSS v3 Score 7.8
CVSS v2 Score 7.2
References
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3d0220f6861d713213b015b582e9f21e5b28d2e0
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a7036191277f9fa68d92f2071ddc38c09b1e5ee5
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb01a1bba579b4b1c5566af24d95f1767859771e
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LR3OKKPHIBGOMHN476CMLW2T7UG53QX/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJCABL43FT3FKRX5DBPZG25FNKR6CEK4/
- https://security.netapp.com/advisory/ntap-20210706-0004/
- https://www.openwall.com/lists/oss-security/2021/05/27/1
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3d0220f6861d713213b015b582e9f21e5b28d2e0
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a7036191277f9fa68d92f2071ddc38c09b1e5ee5
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb01a1bba579b4b1c5566af24d95f1767859771e
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LR3OKKPHIBGOMHN476CMLW2T7UG53QX/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJCABL43FT3FKRX5DBPZG25FNKR6CEK4/
- https://security.netapp.com/advisory/ntap-20210706-0004/
- https://www.openwall.com/lists/oss-security/2021/05/27/1
Products affected by CVE-2021-33200
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cpe:2.3:a:netapp:cloud_backup:-
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cpe:2.3:a:netapp:solidfire_&_hci_management_node:-
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cpe:2.3:a:netapp:solidfire_baseboard_management_controller:-
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cpe:2.3:h:netapp:h300e:-
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cpe:2.3:h:netapp:h300s:-
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cpe:2.3:h:netapp:h410s:-
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cpe:2.3:h:netapp:h500e:-
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cpe:2.3:h:netapp:h500s:-
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cpe:2.3:h:netapp:h700e:-
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cpe:2.3:h:netapp:h700s:-
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cpe:2.3:o:fedoraproject:fedora:33
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cpe:2.3:o:fedoraproject:fedora:34
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cpe:2.3:o:linux:linux_kernel:5.10.33
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cpe:2.3:o:linux:linux_kernel:5.10.34
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cpe:2.3:o:linux:linux_kernel:5.10.35
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cpe:2.3:o:linux:linux_kernel:5.10.36
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cpe:2.3:o:linux:linux_kernel:5.10.37
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cpe:2.3:o:linux:linux_kernel:5.10.38
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cpe:2.3:o:linux:linux_kernel:5.10.39
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cpe:2.3:o:linux:linux_kernel:5.10.40
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cpe:2.3:o:linux:linux_kernel:5.11.17
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cpe:2.3:o:linux:linux_kernel:5.11.18
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cpe:2.3:o:linux:linux_kernel:5.11.19
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cpe:2.3:o:linux:linux_kernel:5.11.20
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cpe:2.3:o:linux:linux_kernel:5.11.21
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cpe:2.3:o:linux:linux_kernel:5.11.22
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cpe:2.3:o:linux:linux_kernel:5.12
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cpe:2.3:o:linux:linux_kernel:5.12.1
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cpe:2.3:o:linux:linux_kernel:5.12.2
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cpe:2.3:o:linux:linux_kernel:5.12.3
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cpe:2.3:o:linux:linux_kernel:5.12.4
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cpe:2.3:o:linux:linux_kernel:5.12.5
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cpe:2.3:o:linux:linux_kernel:5.12.6
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cpe:2.3:o:linux:linux_kernel:5.12.7
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cpe:2.3:o:linux:linux_kernel:5.4.116
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cpe:2.3:o:linux:linux_kernel:5.4.117
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cpe:2.3:o:linux:linux_kernel:5.4.118
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cpe:2.3:o:linux:linux_kernel:5.4.119
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cpe:2.3:o:linux:linux_kernel:5.4.120
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cpe:2.3:o:linux:linux_kernel:5.4.121
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cpe:2.3:o:linux:linux_kernel:5.4.122
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cpe:2.3:o:netapp:h300e_firmware:-
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cpe:2.3:o:netapp:h300s_firmware:-
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cpe:2.3:o:netapp:h410s_firmware:-
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cpe:2.3:o:netapp:h500e_firmware:-
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cpe:2.3:o:netapp:h500s_firmware:-
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cpe:2.3:o:netapp:h700e_firmware:-
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cpe:2.3:o:netapp:h700s_firmware:-