CVE-2024-56648: net: hsr: avoid potential out-of-bound access in fill_frame_info()
First published: Fri Dec 27 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: net: hsr: avoid potential out-of-bound access in fill_frame_info() syzbot is able to feed a packet with 14 bytes, pretending it is a vlan one. Since fill_frame_info() is relying on skb->mac_len already, extend the check to cover this case. BUG: KMSAN: uninit-value in fill_frame_info net/hsr/hsr_forward.c:709 [inline] BUG: KMSAN: uninit-value in hsr_forward_skb+0x9ee/0x3b10 net/hsr/hsr_forward.c:724 fill_frame_info net/hsr/hsr_forward.c:709 [inline] hsr_forward_skb+0x9ee/0x3b10 net/hsr/hsr_forward.c:724 hsr_dev_xmit+0x2f0/0x350 net/hsr/hsr_device.c:235 __netdev_start_xmit include/linux/netdevice.h:5002 [inline] netdev_start_xmit include/linux/netdevice.h:5011 [inline] xmit_one net/core/dev.c:3590 [inline] dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3606 __dev_queue_xmit+0x366a/0x57d0 net/core/dev.c:4434 dev_queue_xmit include/linux/netdevice.h:3168 [inline] packet_xmit+0x9c/0x6c0 net/packet/af_packet.c:276 packet_snd net/packet/af_packet.c:3146 [inline] packet_sendmsg+0x91ae/0xa6f0 net/packet/af_packet.c:3178 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:726 __sys_sendto+0x594/0x750 net/socket.c:2197 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0x125/0x1d0 net/socket.c:2200 x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:4091 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4186 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1323 [inline] alloc_skb_with_frags+0xc8/0xd00 net/core/skbuff.c:6612 sock_alloc_send_pskb+0xa81/0xbf0 net/core/sock.c:2881 packet_alloc_skb net/packet/af_packet.c:2995 [inline] packet_snd net/packet/af_packet.c:3089 [inline] packet_sendmsg+0x74c6/0xa6f0 net/packet/af_packet.c:3178 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:726 __sys_sendto+0x594/0x750 net/socket.c:2197 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0x125/0x1d0 net/socket.c:2200 x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.10.42<5.10.231 | |
| Linux Kernel | >=5.12.9<5.15.174 | |
| Linux Kernel | >=5.16<6.1.120 | |
| Linux Kernel | >=6.2<6.6.66 | |
| Linux Kernel | >=6.7<6.12.5 | |
| Linux Kernel | =6.13-rc1 | |
| debian/linux | <=5.10.223-1 | 5.10.234-1 6.1.129-1 6.1.133-1 6.12.22-1 |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/aa632691c722a123e47ccd05a3afdd5f87a36061
- https://git.kernel.org/stable/c/c6e778901d0055356c4fb223058364cae731494a
- https://git.kernel.org/stable/c/6bb5c8ebc99f0671dbd3c9408ebaf935c3951186
- https://git.kernel.org/stable/c/3c215663b3e27a3b08cefcaea623ff54c70c8035
- https://git.kernel.org/stable/c/7ea527fbd7b94d0bee64a0a7e98279bcc654b322
- https://git.kernel.org/stable/c/b9653d19e556c6afd035602927a93d100a0d7644
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-56648
- https://nvd.nist.gov/vuln/detail/CVE-2024-56648
- https://launchpad.net/bugs/cve/CVE-2024-56648
- https://security-tracker.debian.org/tracker/CVE-2024-56648
- https://ubuntu.com/security/CVE-2024-56648
- https://git.kernel.org/linus/b9653d19e556c6afd035602927a93d100a0d7644
Frequently Asked Questions
What is the severity of CVE-2024-56648?
CVE-2024-56648 has been classified with a severity rating of medium due to the potential for out-of-bounds access.
How do I fix CVE-2024-56648?
To resolve CVE-2024-56648, it is recommended to update your Linux kernel to a version that includes the patch addressing this vulnerability.
Which versions of the Linux kernel are affected by CVE-2024-56648?
CVE-2024-56648 affects multiple versions of the Linux kernel, specifically those between 5.10.42 and 5.10.231, as well as others in the specified version ranges.
What is the nature of the vulnerability described in CVE-2024-56648?
CVE-2024-56648 is related to potential out-of-bounds access in the fill_frame_info() function within the networking subsystem of the Linux kernel.
Can CVE-2024-56648 be exploited remotely?
Yes, CVE-2024-56648 can potentially be exploited through specially crafted packets, posing a risk for remote exploitation.
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