CVE - CVE-2022-48651

CVE-ID
CVE-2022-48651	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: ipvlan: Fix out-of-bound bugs caused by unset skb->mac_header If an AF_PACKET socket is used to send packets through ipvlan and the default xmit function of the AF_PACKET socket is changed from dev_queue_xmit() to packet_direct_xmit() via setsockopt() with the option name of PACKET_QDISC_BYPASS, the skb->mac_header may not be reset and remains as the initial value of 65535, this may trigger slab-out-of-bounds bugs as following: ================================================================= UG: KASAN: slab-out-of-bounds in ipvlan_xmit_mode_l2+0xdb/0x330 [ipvlan] PU: 2 PID: 1768 Comm: raw_send Kdump: loaded Not tainted 6.0.0-rc4+ #6 ardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 all Trace: print_address_description.constprop.0+0x1d/0x160 print_report.cold+0x4f/0x112 kasan_report+0xa3/0x130 ipvlan_xmit_mode_l2+0xdb/0x330 [ipvlan] ipvlan_start_xmit+0x29/0xa0 [ipvlan] __dev_direct_xmit+0x2e2/0x380 packet_direct_xmit+0x22/0x60 packet_snd+0x7c9/0xc40 sock_sendmsg+0x9a/0xa0 __sys_sendto+0x18a/0x230 __x64_sys_sendto+0x74/0x90 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd The root cause is: 1. packet_snd() only reset skb->mac_header when sock->type is SOCK_RAW and skb->protocol is not specified as in packet_parse_headers() 2. packet_direct_xmit() doesn't reset skb->mac_header as dev_queue_xmit() In this case, skb->mac_header is 65535 when ipvlan_xmit_mode_l2() is called. So when ipvlan_xmit_mode_l2() gets mac header with eth_hdr() which use "skb->head + skb->mac_header", out-of-bound access occurs. This patch replaces eth_hdr() with skb_eth_hdr() in ipvlan_xmit_mode_l2() and reset mac header in multicast to solve this out-of-bound bug.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/25efdbe5fe542c3063d1948cc4e98abcb57621ca URL:https://git.kernel.org/stable/c/25efdbe5fe542c3063d1948cc4e98abcb57621ca MISC:https://git.kernel.org/stable/c/346e94aa4a99378592c46d6a34c72703a32bd5be URL:https://git.kernel.org/stable/c/346e94aa4a99378592c46d6a34c72703a32bd5be MISC:https://git.kernel.org/stable/c/81225b2ea161af48e093f58e8dfee6d705b16af4 URL:https://git.kernel.org/stable/c/81225b2ea161af48e093f58e8dfee6d705b16af4 MISC:https://git.kernel.org/stable/c/8d06006c7eb75587d986da46c48ba9274f94e8e7 URL:https://git.kernel.org/stable/c/8d06006c7eb75587d986da46c48ba9274f94e8e7 MISC:https://git.kernel.org/stable/c/ab4a733874ead120691e8038272d22f8444d3638 URL:https://git.kernel.org/stable/c/ab4a733874ead120691e8038272d22f8444d3638 MISC:https://git.kernel.org/stable/c/b583e6b25bf9321c91154f6c78d2173ef12c4241 URL:https://git.kernel.org/stable/c/b583e6b25bf9321c91154f6c78d2173ef12c4241 MISC:https://git.kernel.org/stable/c/bffcdade259c05ab3436b5fab711612093c275ef URL:https://git.kernel.org/stable/c/bffcdade259c05ab3436b5fab711612093c275ef MISC:https://git.kernel.org/stable/c/e2b46cd5796f083e452fbc624f65b80328b0c1a4 URL:https://git.kernel.org/stable/c/e2b46cd5796f083e452fbc624f65b80328b0c1a4
Assigning CNA
kernel.org
Date Record Created
20240225	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240225)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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