Описание
In the Linux kernel, the following vulnerability has been resolved:
wifi: cfg80211: check A-MSDU format more carefully
If it looks like there's another subframe in the A-MSDU
but the header isn't fully there, we can end up reading
data out of bounds, only to discard later. Make this a
bit more careful and check if the subframe header can
even be present.
A flaw was found in the Linux kernel's cfg80211 wireless subsystem. When parsing an Aggregate MAC Service Data Unit (A-MSDU), insufficient validation of subframe headers can cause an out-of-bounds memory read. An attacker within wireless network range transmitting specially crafted frames could exploit this vulnerability to trigger a system crash, resulting in a Denial of Service (DoS), or potentially expose sensitive memory contents.
Отчет
A flaw was found in the Linux kernel's cfg80211 wireless subsystem, affecting the kernel and kernel-rt packages in Red Hat Enterprise Linux 8 and 9, and it was rated Moderate by Red Hat Product Security. When parsing an Aggregate MAC Service Data Unit (A-MSDU), insufficient validation of subframe headers can cause an out-of-bounds memory read. An attacker within wireless network range of an affected system who transmits specially crafted frames could exploit this flaw to trigger a system crash, resulting in a denial of service, or potentially expose sensitive memory contents. Red Hat's Moderate impact rating is lower than the Important severity implied by the NIST and CVE.org CVSS 3.1 base scores (7.1 and 8.1) because exploitation requires an attacker to be within range of the target's wireless network and relies on processing A-MSDU-aggregated frames through the affected cfg80211 parsing path, which limits exposure for typical installations. Fixes are being pursued for the affected Red Hat Enterprise Linux release streams through the kernel and real-time kernel components.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | ||
| Red Hat Enterprise Linux 7 | kernel | Out of support scope | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Out of support scope | ||
| Red Hat Enterprise Linux 9 | kernel-rt | Affected | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Fixed | RHSA-2024:5102 | 08.08.2024 |
| Red Hat Enterprise Linux 8 | kernel | Fixed | RHSA-2024:5101 | 08.08.2024 |
| Red Hat Enterprise Linux 8.8 Extended Update Support | kernel | Fixed | RHSA-2024:4740 | 23.07.2024 |
| Red Hat Enterprise Linux 9 | kernel | Fixed | RHSA-2024:5363 | 15.08.2024 |
| Red Hat Enterprise Linux 9 | kernel | Fixed | RHSA-2024:5363 | 15.08.2024 |
| Red Hat Enterprise Linux 9.2 Extended Update Support | kernel | Fixed | RHSA-2024:5364 | 14.08.2024 |
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Дополнительная информация
Статус:
EPSS
7.1 High
CVSS3
Связанные уязвимости
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: check A-MSDU format more carefully If it looks like there's another subframe in the A-MSDU but the header isn't fully there, we can end up reading data out of bounds, only to discard later. Make this a bit more careful and check if the subframe header can even be present.
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: check A-MSDU format more carefully If it looks like there's another subframe in the A-MSDU but the header isn't fully there, we can end up reading data out of bounds, only to discard later. Make this a bit more careful and check if the subframe header can even be present.
In the Linux kernel, the following vulnerability has been resolved: w ...
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: check A-MSDU format more carefully If it looks like there's another subframe in the A-MSDU but the header isn't fully there, we can end up reading data out of bounds, only to discard later. Make this a bit more careful and check if the subframe header can even be present.
EPSS
7.1 High
CVSS3