ID CVE-2021-28039
Summary An issue was discovered in the Linux kernel 5.9.x through 5.11.3, as used with Xen. In some less-common configurations, an x86 PV guest OS user can crash a Dom0 or driver domain via a large amount of I/O activity. The issue relates to misuse of guest physical addresses when a configuration has CONFIG_XEN_UNPOPULATED_ALLOC but not CONFIG_XEN_BALLOON_MEMORY_HOTPLUG.
References
Vulnerable Configurations
  • cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:*
    cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:x86:*
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:x86:*
  • cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
    cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:*
CVSS
Base: 2.1 (as of 21-11-2024 - 05:59)
Impact:
Exploitability:
CWE CWE-131
CAPEC
  • Buffer Overflow via Parameter Expansion
    In this attack, the target software is given input that the attacker knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an adversary. As a consequence, an adversary is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the adversaries' choice.
Access
VectorComplexityAuthentication
LOCAL LOW NONE
Impact
ConfidentialityIntegrityAvailability
NONE NONE PARTIAL
cvss-vector via4 AV:L/AC:L/Au:N/C:N/I:N/A:P
Last major update 21-11-2024 - 05:59
Published 05-03-2021 - 18:15
Last modified 21-11-2024 - 05:59
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