vulnerability
Oracle Linux: CVE-2024-41091: ELSA-2024-12581: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)
Severity | CVSS | Published | Added | Modified |
---|---|---|---|---|
5 | (AV:L/AC:L/Au:N/C:N/I:N/A:C) | 07/24/2024 | 08/16/2024 | 01/23/2025 |
Severity
5
CVSS
(AV:L/AC:L/Au:N/C:N/I:N/A:C)
Published
07/24/2024
Added
08/16/2024
Modified
01/23/2025
Description
In the Linux kernel, the following vulnerability has been resolved:
tun: add missing verification for short frame
The cited commit missed to check against the validity of the frame length
in the tun_xdp_one() path, which could cause a corrupted skb to be sent
downstack. Even before the skb is transmitted, the
tun_xdp_one-->eth_type_trans() may access the Ethernet header although it
can be less than ETH_HLEN. Once transmitted, this could either cause
out-of-bound access beyond the actual length, or confuse the underlayer
with incorrect or inconsistent header length in the skb metadata.
In the alternative path, tun_get_user() already prohibits short frame which
has the length less than Ethernet header size from being transmitted for
IFF_TAP.
This is to drop any frame shorter than the Ethernet header size just like
how tun_get_user() does.
CVE: CVE-2024-41091
A denial of service (DoS) attack was found in the mlx5 driver in the Linux kernel. A KVM guest VM using virtio-net can crash the host by sending a short packet, for example, size < ETH_HLEN. The packet may traverse through vhost-net, macvtap, and vlan without any validation or drop. When this packet is presented to the mlx5 driver on the host side, the kernel panic happens since mlx5_core assumes the frame size is always >= ETH_HLEN.
tun: add missing verification for short frame
The cited commit missed to check against the validity of the frame length
in the tun_xdp_one() path, which could cause a corrupted skb to be sent
downstack. Even before the skb is transmitted, the
tun_xdp_one-->eth_type_trans() may access the Ethernet header although it
can be less than ETH_HLEN. Once transmitted, this could either cause
out-of-bound access beyond the actual length, or confuse the underlayer
with incorrect or inconsistent header length in the skb metadata.
In the alternative path, tun_get_user() already prohibits short frame which
has the length less than Ethernet header size from being transmitted for
IFF_TAP.
This is to drop any frame shorter than the Ethernet header size just like
how tun_get_user() does.
CVE: CVE-2024-41091
A denial of service (DoS) attack was found in the mlx5 driver in the Linux kernel. A KVM guest VM using virtio-net can crash the host by sending a short packet, for example, size < ETH_HLEN. The packet may traverse through vhost-net, macvtap, and vlan without any validation or drop. When this packet is presented to the mlx5 driver on the host side, the kernel panic happens since mlx5_core assumes the frame size is always >= ETH_HLEN.
Solution(s)
oracle-linux-upgrade-kerneloracle-linux-upgrade-kernel-uek
References
- CVE-2024-41091
- https://attackerkb.com/topics/CVE-2024-41091
- ELSA-ELSA-2024-12581
- ELSA-ELSA-2024-5928
- ELSA-ELSA-2024-12549
- ELSA-ELSA-2024-7000
- ELSA-ELSA-2024-12546
- ELSA-ELSA-2024-12582
- ELSA-ELSA-2024-12548
- ELSA-ELSA-2024-12547
- ELSA-ELSA-2024-12584
- ELSA-ELSA-2024-12585
- ELSA-ELSA-2024-12782
- ELSA-ELSA-2024-12571
- ELSA-ELSA-2024-12583
- ELSA-ELSA-2024-12780
- ELSA-ELSA-2024-12570
- ELSA-ELSA-2024-12551
- ELSA-ELSA-2024-12552
- ELSA-ELSA-2024-12815

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