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Debian: CVE-2021-47102: linux -- security update

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Debian: CVE-2021-47102: linux -- security update

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
03/04/2024
Created
07/31/2024
Added
07/30/2024
Modified
07/30/2024

Description

In the Linux kernel, the following vulnerability has been resolved: net: marvell: prestera: fix incorrect structure access In line: upper = info->upper_dev; We access upper_dev field, which is related only for particular events (e.g. event == NETDEV_CHANGEUPPER). So, this line cause invalid memory access for another events, when ptr is not netdev_notifier_changeupper_info. The KASAN logs are as follows: [ 30.123165] BUG: KASAN: stack-out-of-bounds in prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera] [ 30.133336] Read of size 8 at addr ffff80000cf772b0 by task udevd/778 [ 30.139866] [ 30.141398] CPU: 0 PID: 778 Comm: udevd Not tainted 5.16.0-rc3 #6 [ 30.147588] Hardware name: DNI AmazonGo1 A7040 board (DT) [ 30.153056] Call trace: [ 30.155547]dump_backtrace+0x0/0x2c0 [ 30.159320]show_stack+0x18/0x30 [ 30.162729]dump_stack_lvl+0x68/0x84 [ 30.166491]print_address_description.constprop.0+0x74/0x2b8 [ 30.172346]kasan_report+0x1e8/0x250 [ 30.176102]__asan_load8+0x98/0xe0 [ 30.179682]prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera] [ 30.186847]prestera_netdev_event_handler+0x1b4/0x1c0 [prestera] [ 30.193313]raw_notifier_call_chain+0x74/0xa0 [ 30.197860]call_netdevice_notifiers_info+0x68/0xc0 [ 30.202924]register_netdevice+0x3cc/0x760 [ 30.207190]register_netdev+0x24/0x50 [ 30.211015]prestera_device_register+0x8a0/0xba0 [prestera]

Solution(s)

  • debian-upgrade-linux

References

  • https://attackerkb.com/topics/cve-2021-47102
  • CVE - 2021-47102
  • 查看数 705
  • 已创建
  • 最后回复

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