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Rocky Linux: CVE-2024-35870: kernel (RLSA-2024-4349)

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Rocky Linux: CVE-2024-35870: kernel (RLSA-2024-4349)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
05/19/2024
Created
07/16/2024
Added
07/16/2024
Modified
07/16/2024

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix UAF in smb2_reconnect_server() The UAF bug is due to smb2_reconnect_server() accessing a session that is already being teared down by another thread that is executing __cifs_put_smb_ses(). This can happen when (a) the client has connection to the server but no session or (b) another thread ends up setting @ses->ses_status again to something different than SES_EXITING. To fix this, we need to make sure to unconditionally set @ses->ses_status to SES_EXITING and prevent any other threads from setting a new status while we're still tearing it down. The following can be reproduced by adding some delay to right after the ipc is freed in __cifs_put_smb_ses() - which will give smb2_reconnect_server() worker a chance to run and then accessing @ses->ipc: kinit ... mount.cifs //srv/share /mnt/1 -o sec=krb5,nohandlecache,echo_interval=10 [disconnect srv] ls /mnt/1 &>/dev/null sleep 30 kdestroy [reconnect srv] sleep 10 umount /mnt/1 ... CIFS: VFS: Verify user has a krb5 ticket and keyutils is installed CIFS: VFS: \\srv Send error in SessSetup = -126 CIFS: VFS: Verify user has a krb5 ticket and keyutils is installed CIFS: VFS: \\srv Send error in SessSetup = -126 general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b6b6b: 0000 [#1] PREEMPT SMP NOPTI CPU: 3 PID: 50 Comm: kworker/3:1 Not tainted 6.9.0-rc2 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014 Workqueue: cifsiod smb2_reconnect_server [cifs] RIP: 0010:__list_del_entry_valid_or_report+0x33/0xf0 Code: 4f 08 48 85 d2 74 42 48 85 c9 74 59 48 b8 00 01 00 00 00 00 ad de 48 39 c2 74 61 48 b8 22 01 00 00 00 00 74 69 <48> 8b 01 48 39 f8 75 7b 48 8b 72 08 48 39 c6 0f 85 88 00 00 00 b8 RSP: 0018:ffffc900001bfd70 EFLAGS: 00010a83 RAX: dead000000000122 RBX: ffff88810da53838 RCX: 6b6b6b6b6b6b6b6b RDX: 6b6b6b6b6b6b6b6b RSI: ffffffffc02f6878 RDI: ffff88810da53800 RBP: ffff88810da53800 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88810c064000 R13: 0000000000000001 R14: ffff88810c064000 R15: ffff8881039cc000 FS: 0000000000000000(0000) GS:ffff888157c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe3728b1000 CR3: 000000010caa4000 CR4: 0000000000750ef0 PKRU: 55555554 Call Trace: <TASK> ? die_addr+0x36/0x90 ? exc_general_protection+0x1c1/0x3f0 ? asm_exc_general_protection+0x26/0x30 ? __list_del_entry_valid_or_report+0x33/0xf0 __cifs_put_smb_ses+0x1ae/0x500 [cifs] smb2_reconnect_server+0x4ed/0x710 [cifs] process_one_work+0x205/0x6b0 worker_thread+0x191/0x360 ? __pfx_worker_thread+0x10/0x10 kthread+0xe2/0x110 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x34/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK>

Solution(s)

  • rocky-upgrade-bpftool
  • rocky-upgrade-bpftool-debuginfo
  • rocky-upgrade-kernel
  • rocky-upgrade-kernel-64k
  • rocky-upgrade-kernel-64k-core
  • rocky-upgrade-kernel-64k-debug
  • rocky-upgrade-kernel-64k-debug-core
  • rocky-upgrade-kernel-64k-debug-debuginfo
  • rocky-upgrade-kernel-64k-debug-devel
  • rocky-upgrade-kernel-64k-debug-devel-matched
  • rocky-upgrade-kernel-64k-debug-modules
  • rocky-upgrade-kernel-64k-debug-modules-core
  • rocky-upgrade-kernel-64k-debug-modules-extra
  • rocky-upgrade-kernel-64k-debuginfo
  • rocky-upgrade-kernel-64k-devel
  • rocky-upgrade-kernel-64k-devel-matched
  • rocky-upgrade-kernel-64k-modules
  • rocky-upgrade-kernel-64k-modules-core
  • rocky-upgrade-kernel-64k-modules-extra
  • rocky-upgrade-kernel-abi-stablelists
  • rocky-upgrade-kernel-core
  • rocky-upgrade-kernel-cross-headers
  • rocky-upgrade-kernel-debug
  • rocky-upgrade-kernel-debug-core
  • rocky-upgrade-kernel-debug-debuginfo
  • rocky-upgrade-kernel-debug-devel
  • rocky-upgrade-kernel-debug-devel-matched
  • rocky-upgrade-kernel-debug-modules
  • rocky-upgrade-kernel-debug-modules-core
  • rocky-upgrade-kernel-debug-modules-extra
  • rocky-upgrade-kernel-debug-uki-virt
  • rocky-upgrade-kernel-debuginfo
  • rocky-upgrade-kernel-devel
  • rocky-upgrade-kernel-devel-matched
  • rocky-upgrade-kernel-doc
  • rocky-upgrade-kernel-headers
  • rocky-upgrade-kernel-modules
  • rocky-upgrade-kernel-modules-core
  • rocky-upgrade-kernel-modules-extra
  • rocky-upgrade-kernel-rt
  • rocky-upgrade-kernel-rt-core
  • rocky-upgrade-kernel-rt-debug
  • rocky-upgrade-kernel-rt-debug-core
  • rocky-upgrade-kernel-rt-debug-debuginfo
  • rocky-upgrade-kernel-rt-debug-devel
  • rocky-upgrade-kernel-rt-debug-kvm
  • rocky-upgrade-kernel-rt-debug-modules
  • rocky-upgrade-kernel-rt-debug-modules-core
  • rocky-upgrade-kernel-rt-debug-modules-extra
  • rocky-upgrade-kernel-rt-debuginfo
  • rocky-upgrade-kernel-rt-devel
  • rocky-upgrade-kernel-rt-kvm
  • rocky-upgrade-kernel-rt-modules
  • rocky-upgrade-kernel-rt-modules-core
  • rocky-upgrade-kernel-rt-modules-extra
  • rocky-upgrade-kernel-tools
  • rocky-upgrade-kernel-tools-debuginfo
  • rocky-upgrade-kernel-tools-libs
  • rocky-upgrade-kernel-tools-libs-devel
  • rocky-upgrade-kernel-uki-virt
  • rocky-upgrade-kernel-zfcpdump
  • rocky-upgrade-kernel-zfcpdump-core
  • rocky-upgrade-kernel-zfcpdump-debuginfo
  • rocky-upgrade-kernel-zfcpdump-devel
  • rocky-upgrade-kernel-zfcpdump-devel-matched
  • rocky-upgrade-kernel-zfcpdump-modules
  • rocky-upgrade-kernel-zfcpdump-modules-core
  • rocky-upgrade-kernel-zfcpdump-modules-extra
  • rocky-upgrade-libperf
  • rocky-upgrade-libperf-debuginfo
  • rocky-upgrade-perf
  • rocky-upgrade-perf-debuginfo
  • rocky-upgrade-python3-perf
  • rocky-upgrade-python3-perf-debuginfo
  • rocky-upgrade-rtla
  • rocky-upgrade-rv

References

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