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CVE-2021-29155

Опубликовано: 20 апр. 2021
Источник: debian

Описание

An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.

Пакеты

ПакетСтатусВерсия исправленияРелизТип
linuxfixed5.10.38-1package
linuxfixed4.19.194-1busterpackage
linuxnot-affectedstretchpackage

Примечания

  • https://www.openwall.com/lists/oss-security/2021/04/18/4

  • Fixes need to be made complete for older series to not open CVE-2021-33200,

  • cf. https://lore.kernel.org/stable/215e98bf-21c7-0074-129d-49a51526418b@iogearbox.net/

Связанные уязвимости

CVSS3: 5.5
ubuntu
больше 4 лет назад

An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.

CVSS3: 4.4
redhat
больше 4 лет назад

An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.

CVSS3: 5.5
nvd
больше 4 лет назад

An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.

CVSS3: 5.5
msrc
больше 4 лет назад

Описание отсутствует

CVSS3: 5.5
github
около 3 лет назад

An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.