Errata ALT-PU-2023-4655-3: Information
Fixes
Published: June 7, 2022
BDU:2022-03372
Уязвимость функции grub_net_recv_ip4_packets программы-загрузчика операционных систем Grub, позволяющая нарушителю выполнить произвольный код путем отправки специально сформированных IP-пакетов
Severity: HIGH (8.1) Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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Published: July 20, 2023
Modified: Aug. 26, 2023
Modified: Aug. 26, 2023
CVE-2022-28733
Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in grub_net_recv_ip4_packets() function on rsm->total_len value. Under certain circumstances the total_len value may end up wrapping around to a small integer number which will be used in memory allocation. If the attack succeeds in such way, subsequent operations can write past the end of the buffer.
Severity: HIGH (8.1) Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Links:
Published: July 20, 2023
Modified: July 28, 2023
Modified: July 28, 2023
CVE-2022-28737
There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not discarded in such scenario.
Severity: HIGH (7.8) Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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