CVE-2023-52577

2024-03-0222:15:49

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

linux kernel

vulnerability

dccp

fix

security

kernel

cve-2023-52577

6.5 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.2%

JSON

In the Linux kernel, the following vulnerability has been resolved:

dccp: fix dccp_v4_err()/dccp_v6_err() again

dh->dccph_x is the 9th byte (offset 8) in “struct dccp_hdr”,
not in the “byte 7” as Jann claimed.

We need to make sure the ICMP messages are big enough,
using more standard ways (no more assumptions).

syzbot reported:
BUG: KMSAN: uninit-value in pskb_may_pull_reason include/linux/skbuff.h:2667 [inline]
BUG: KMSAN: uninit-value in pskb_may_pull include/linux/skbuff.h:2681 [inline]
BUG: KMSAN: uninit-value in dccp_v6_err+0x426/0x1aa0 net/dccp/ipv6.c:94
pskb_may_pull_reason include/linux/skbuff.h:2667 [inline]
pskb_may_pull include/linux/skbuff.h:2681 [inline]
dccp_v6_err+0x426/0x1aa0 net/dccp/ipv6.c:94
icmpv6_notify+0x4c7/0x880 net/ipv6/icmp.c:867
icmpv6_rcv+0x19d5/0x30d0
ip6_protocol_deliver_rcu+0xda6/0x2a60 net/ipv6/ip6_input.c:438
ip6_input_finish net/ipv6/ip6_input.c:483 [inline]
NF_HOOK include/linux/netfilter.h:304 [inline]
ip6_input+0x15d/0x430 net/ipv6/ip6_input.c:492
ip6_mc_input+0xa7e/0xc80 net/ipv6/ip6_input.c:586
dst_input include/net/dst.h:468 [inline]
ip6_rcv_finish+0x5db/0x870 net/ipv6/ip6_input.c:79
NF_HOOK include/linux/netfilter.h:304 [inline]
ipv6_rcv+0xda/0x390 net/ipv6/ip6_input.c:310
__netif_receive_skb_one_core net/core/dev.c:5523 [inline]
__netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5637
netif_receive_skb_internal net/core/dev.c:5723 [inline]
netif_receive_skb+0x58/0x660 net/core/dev.c:5782
tun_rx_batched+0x83b/0x920
tun_get_user+0x564c/0x6940 drivers/net/tun.c:2002
tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048
call_write_iter include/linux/fs.h:1985 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x8ef/0x15c0 fs/read_write.c:584
ksys_write+0x20f/0x4c0 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x93/0xd0 fs/read_write.c:646
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

Uninit was created at:
slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767
slab_alloc_node mm/slub.c:3478 [inline]
kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523
kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:559
__alloc_skb+0x318/0x740 net/core/skbuff.c:650
alloc_skb include/linux/skbuff.h:1286 [inline]
alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6313
sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2795
tun_alloc_skb drivers/net/tun.c:1531 [inline]
tun_get_user+0x23cf/0x6940 drivers/net/tun.c:1846
tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048
call_write_iter include/linux/fs.h:1985 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x8ef/0x15c0 fs/read_write.c:584
ksys_write+0x20f/0x4c0 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x93/0xd0 fs/read_write.c:646
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

CPU: 0 PID: 4995 Comm: syz-executor153 Not tainted 6.6.0-rc1-syzkaller-00014-ga747acc0b752 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023

Affected configurations

Vulners

Node

linuxlinux_kernelRange4.14.326–4.14.327

linuxlinux_kernelRange4.19.295–4.19.296

linuxlinux_kernelRange5.4.257–5.4.258

linuxlinux_kernelRange5.10.195–5.10.198

linuxlinux_kernelRange5.15.132–5.15.134

linuxlinux_kernelRange6.1.53–6.1.56

linuxlinux_kernelRange6.5.3–6.5.6

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/dccp/ipv4.c",
      "net/dccp/ipv6.c"
    ],
    "versions": [
      {
        "version": "3533e1027255",
        "lessThan": "4600beae416d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "177212bf6dc1",
        "lessThan": "62c218124fe5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7a7dd70cb954",
        "lessThan": "a6f4d582e25d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4b8a938e329a",
        "lessThan": "60d73c62e3e4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6ecf09699eb1",
        "lessThan": "26df9ab5de30",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f8a7f10a1dcc",
        "lessThan": "73be49248a04",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ec620c34f5fa",
        "lessThan": "1512d8f45d3c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "977ad86c2a1b",
        "lessThan": "6af289746a63",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/dccp/ipv4.c",
      "net/dccp/ipv6.c"
    ],
    "versions": [
      {
        "version": "4.14.326",
        "lessThan": "4.14.327",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "4.19.295",
        "lessThan": "4.19.296",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "5.4.257",
        "lessThan": "5.4.258",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "5.10.195",
        "lessThan": "5.10.198",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "5.15.132",
        "lessThan": "5.15.134",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "6.1.53",
        "lessThan": "6.1.56",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "6.5.3",
        "lessThan": "6.5.6",
        "status": "affected",
        "versionType": "custom"
      }
    ]
  }
]