Debian: >> Debian Linux Security Vulnerabilities
In the Linux kernel, the following vulnerability has been resolved:
tcp: Use refcount_inc_not_zero() in tcp_twsk_unique().
Anderson Nascimento reported a use-after-free splat in tcp_twsk_unique()
with nice analysis.
Since commit ec94c2696f0b ("tcp/dccp: avoid one atomic operation for
timewait hashdance"), inet_twsk_hashdance() sets TIME-WAIT socket's
sk_refcnt after putting it into ehash and releasing the bucket lock.
Thus, there is a small race window where other threads could try to
reuse the port during connect() and call sock_hold() in tcp_twsk_unique()
for the TIME-WAIT socket with zero refcnt.
If that happens, the refcnt taken by tcp_twsk_unique() is overwritten
and sock_put() will cause underflow, triggering a real use-after-free
somewhere else.
To avoid the use-after-free, we need to use refcount_inc_not_zero() in
tcp_twsk_unique() and give up on reusing the port if it returns false.
[0]:
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 0 PID: 1039313 at lib/refcount.c:25 refcount_warn_saturate+0xe5/0x110
CPU: 0 PID: 1039313 Comm: trigger Not tainted 6.8.6-200.fc39.x86_64 #1
Hardware name: VMware, Inc. VMware20,1/440BX Desktop Reference Platform, BIOS VMW201.00V.21805430.B64.2305221830 05/22/2023
RIP: 0010:refcount_warn_saturate+0xe5/0x110
Code: 42 8e ff 0f 0b c3 cc cc cc cc 80 3d aa 13 ea 01 00 0f 85 5e ff ff ff 48 c7 c7 f8 8e b7 82 c6 05 96 13 ea 01 01 e8 7b 42 8e ff <0f> 0b c3 cc cc cc cc 48 c7 c7 50 8f b7 82 c6 05 7a 13 ea 01 01 e8
RSP: 0018:ffffc90006b43b60 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888009bb3ef0 RCX: 0000000000000027
RDX: ffff88807be218c8 RSI: 0000000000000001 RDI: ffff88807be218c0
RBP: 0000000000069d70 R08: 0000000000000000 R09: ffffc90006b439f0
R10: ffffc90006b439e8 R11: 0000000000000003 R12: ffff8880029ede84
R13: 0000000000004e20 R14: ffffffff84356dc0 R15: ffff888009bb3ef0
FS: 00007f62c10926c0(0000) GS:ffff88807be00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020ccb000 CR3: 000000004628c005 CR4: 0000000000f70ef0
PKRU: 55555554
Call Trace:
<TASK>
? refcount_warn_saturate+0xe5/0x110
? __warn+0x81/0x130
? refcount_warn_saturate+0xe5/0x110
? report_bug+0x171/0x1a0
? refcount_warn_saturate+0xe5/0x110
? handle_bug+0x3c/0x80
? exc_invalid_op+0x17/0x70
? asm_exc_invalid_op+0x1a/0x20
? refcount_warn_saturate+0xe5/0x110
tcp_twsk_unique+0x186/0x190
__inet_check_established+0x176/0x2d0
__inet_hash_connect+0x74/0x7d0
? __pfx___inet_check_established+0x10/0x10
tcp_v4_connect+0x278/0x530
__inet_stream_connect+0x10f/0x3d0
inet_stream_connect+0x3a/0x60
__sys_connect+0xa8/0xd0
__x64_sys_connect+0x18/0x20
do_syscall_64+0x83/0x170
entry_SYSCALL_64_after_hwframe+0x78/0x80
RIP: 0033:0x7f62c11a885d
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a3 45 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007f62c1091e58 EFLAGS: 00000296 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 0000000020ccb004 RCX: 00007f62c11a885d
RDX: 0000000000000010 RSI: 0000000020ccb000 RDI: 0000000000000003
RBP: 00007f62c1091e90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 00007f62c10926c0
R13: ffffffffffffff88 R14: 0000000000000000 R15: 00007ffe237885b0
</TASK>
CVSS Score
7.8
EPSS Score
0.003
Published
2024-05-30
In the Linux kernel, the following vulnerability has been resolved:
tipc: fix UAF in error path
Sam Page (sam4k) working with Trend Micro Zero Day Initiative reported
a UAF in the tipc_buf_append() error path:
BUG: KASAN: slab-use-after-free in kfree_skb_list_reason+0x47e/0x4c0
linux/net/core/skbuff.c:1183
Read of size 8 at addr ffff88804d2a7c80 by task poc/8034
CPU: 1 PID: 8034 Comm: poc Not tainted 6.8.2 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.16.0-debian-1.16.0-5 04/01/2014
Call Trace:
<IRQ>
__dump_stack linux/lib/dump_stack.c:88
dump_stack_lvl+0xd9/0x1b0 linux/lib/dump_stack.c:106
print_address_description linux/mm/kasan/report.c:377
print_report+0xc4/0x620 linux/mm/kasan/report.c:488
kasan_report+0xda/0x110 linux/mm/kasan/report.c:601
kfree_skb_list_reason+0x47e/0x4c0 linux/net/core/skbuff.c:1183
skb_release_data+0x5af/0x880 linux/net/core/skbuff.c:1026
skb_release_all linux/net/core/skbuff.c:1094
__kfree_skb linux/net/core/skbuff.c:1108
kfree_skb_reason+0x12d/0x210 linux/net/core/skbuff.c:1144
kfree_skb linux/./include/linux/skbuff.h:1244
tipc_buf_append+0x425/0xb50 linux/net/tipc/msg.c:186
tipc_link_input+0x224/0x7c0 linux/net/tipc/link.c:1324
tipc_link_rcv+0x76e/0x2d70 linux/net/tipc/link.c:1824
tipc_rcv+0x45f/0x10f0 linux/net/tipc/node.c:2159
tipc_udp_recv+0x73b/0x8f0 linux/net/tipc/udp_media.c:390
udp_queue_rcv_one_skb+0xad2/0x1850 linux/net/ipv4/udp.c:2108
udp_queue_rcv_skb+0x131/0xb00 linux/net/ipv4/udp.c:2186
udp_unicast_rcv_skb+0x165/0x3b0 linux/net/ipv4/udp.c:2346
__udp4_lib_rcv+0x2594/0x3400 linux/net/ipv4/udp.c:2422
ip_protocol_deliver_rcu+0x30c/0x4e0 linux/net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x2e4/0x520 linux/net/ipv4/ip_input.c:233
NF_HOOK linux/./include/linux/netfilter.h:314
NF_HOOK linux/./include/linux/netfilter.h:308
ip_local_deliver+0x18e/0x1f0 linux/net/ipv4/ip_input.c:254
dst_input linux/./include/net/dst.h:461
ip_rcv_finish linux/net/ipv4/ip_input.c:449
NF_HOOK linux/./include/linux/netfilter.h:314
NF_HOOK linux/./include/linux/netfilter.h:308
ip_rcv+0x2c5/0x5d0 linux/net/ipv4/ip_input.c:569
__netif_receive_skb_one_core+0x199/0x1e0 linux/net/core/dev.c:5534
__netif_receive_skb+0x1f/0x1c0 linux/net/core/dev.c:5648
process_backlog+0x101/0x6b0 linux/net/core/dev.c:5976
__napi_poll.constprop.0+0xba/0x550 linux/net/core/dev.c:6576
napi_poll linux/net/core/dev.c:6645
net_rx_action+0x95a/0xe90 linux/net/core/dev.c:6781
__do_softirq+0x21f/0x8e7 linux/kernel/softirq.c:553
do_softirq linux/kernel/softirq.c:454
do_softirq+0xb2/0xf0 linux/kernel/softirq.c:441
</IRQ>
<TASK>
__local_bh_enable_ip+0x100/0x120 linux/kernel/softirq.c:381
local_bh_enable linux/./include/linux/bottom_half.h:33
rcu_read_unlock_bh linux/./include/linux/rcupdate.h:851
__dev_queue_xmit+0x871/0x3ee0 linux/net/core/dev.c:4378
dev_queue_xmit linux/./include/linux/netdevice.h:3169
neigh_hh_output linux/./include/net/neighbour.h:526
neigh_output linux/./include/net/neighbour.h:540
ip_finish_output2+0x169f/0x2550 linux/net/ipv4/ip_output.c:235
__ip_finish_output linux/net/ipv4/ip_output.c:313
__ip_finish_output+0x49e/0x950 linux/net/ipv4/ip_output.c:295
ip_finish_output+0x31/0x310 linux/net/ipv4/ip_output.c:323
NF_HOOK_COND linux/./include/linux/netfilter.h:303
ip_output+0x13b/0x2a0 linux/net/ipv4/ip_output.c:433
dst_output linux/./include/net/dst.h:451
ip_local_out linux/net/ipv4/ip_output.c:129
ip_send_skb+0x3e5/0x560 linux/net/ipv4/ip_output.c:1492
udp_send_skb+0x73f/0x1530 linux/net/ipv4/udp.c:963
udp_sendmsg+0x1a36/0x2b40 linux/net/ipv4/udp.c:1250
inet_sendmsg+0x105/0x140 linux/net/ipv4/af_inet.c:850
sock_sendmsg_nosec linux/net/socket.c:730
__sock_sendmsg linux/net/socket.c:745
__sys_sendto+0x42c/0x4e0 linux/net/socket.c:2191
__do_sys_sendto linux/net/socket.c:2203
__se_sys_sendto linux/net/socket.c:2199
__x64_sys_sendto+0xe0/0x1c0 linux/net/socket.c:2199
do_syscall_x64 linux/arch/x86/entry/common.c:52
do_syscall_
---truncated---
CVSS Score
7.8
EPSS Score
0.001
Published
2024-05-30
In the Linux kernel, the following vulnerability has been resolved:
mptcp: ensure snd_nxt is properly initialized on connect
Christoph reported a splat hinting at a corrupted snd_una:
WARNING: CPU: 1 PID: 38 at net/mptcp/protocol.c:1005 __mptcp_clean_una+0x4b3/0x620 net/mptcp/protocol.c:1005
Modules linked in:
CPU: 1 PID: 38 Comm: kworker/1:1 Not tainted 6.9.0-rc1-gbbeac67456c9 #59
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014
Workqueue: events mptcp_worker
RIP: 0010:__mptcp_clean_una+0x4b3/0x620 net/mptcp/protocol.c:1005
Code: be 06 01 00 00 bf 06 01 00 00 e8 a8 12 e7 fe e9 00 fe ff ff e8
8e 1a e7 fe 0f b7 ab 3e 02 00 00 e9 d3 fd ff ff e8 7d 1a e7 fe
<0f> 0b 4c 8b bb e0 05 00 00 e9 74 fc ff ff e8 6a 1a e7 fe 0f 0b e9
RSP: 0018:ffffc9000013fd48 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8881029bd280 RCX: ffffffff82382fe4
RDX: ffff8881003cbd00 RSI: ffffffff823833c3 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: fefefefefefefeff R12: ffff888138ba8000
R13: 0000000000000106 R14: ffff8881029bd908 R15: ffff888126560000
FS: 0000000000000000(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f604a5dae38 CR3: 0000000101dac002 CR4: 0000000000170ef0
Call Trace:
<TASK>
__mptcp_clean_una_wakeup net/mptcp/protocol.c:1055 [inline]
mptcp_clean_una_wakeup net/mptcp/protocol.c:1062 [inline]
__mptcp_retrans+0x7f/0x7e0 net/mptcp/protocol.c:2615
mptcp_worker+0x434/0x740 net/mptcp/protocol.c:2767
process_one_work+0x1e0/0x560 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x3c7/0x640 kernel/workqueue.c:3416
kthread+0x121/0x170 kernel/kthread.c:388
ret_from_fork+0x44/0x50 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
</TASK>
When fallback to TCP happens early on a client socket, snd_nxt
is not yet initialized and any incoming ack will copy such value
into snd_una. If the mptcp worker (dumbly) tries mptcp-level
re-injection after such ack, that would unconditionally trigger a send
buffer cleanup using 'bad' snd_una values.
We could easily disable re-injection for fallback sockets, but such
dumb behavior already helped catching a few subtle issues and a very
low to zero impact in practice.
Instead address the issue always initializing snd_nxt (and write_seq,
for consistency) at connect time.
CVSS Score
5.5
EPSS Score
0.0
Published
2024-05-30
In the Linux kernel, the following vulnerability has been resolved:
net: fix out-of-bounds access in ops_init
net_alloc_generic is called by net_alloc, which is called without any
locking. It reads max_gen_ptrs, which is changed under pernet_ops_rwsem. It
is read twice, first to allocate an array, then to set s.len, which is
later used to limit the bounds of the array access.
It is possible that the array is allocated and another thread is
registering a new pernet ops, increments max_gen_ptrs, which is then used
to set s.len with a larger than allocated length for the variable array.
Fix it by reading max_gen_ptrs only once in net_alloc_generic. If
max_gen_ptrs is later incremented, it will be caught in net_assign_generic.
CVSS Score
7.1
EPSS Score
0.0
Published
2024-05-30
In the Linux kernel, the following vulnerability has been resolved:
clk: sunxi-ng: h6: Reparent CPUX during PLL CPUX rate change
While PLL CPUX clock rate change when CPU is running from it works in
vast majority of cases, now and then it causes instability. This leads
to system crashes and other undefined behaviour. After a lot of testing
(30+ hours) while also doing a lot of frequency switches, we can't
observe any instability issues anymore when doing reparenting to stable
clock like 24 MHz oscillator.
CVSS Score
5.5
EPSS Score
0.0
Published
2024-05-30
In the Linux kernel, the following vulnerability has been resolved:
i40e: fix vf may be used uninitialized in this function warning
To fix the regression introduced by commit 52424f974bc5, which causes
servers hang in very hard to reproduce conditions with resets races.
Using two sources for the information is the root cause.
In this function before the fix bumping v didn't mean bumping vf
pointer. But the code used this variables interchangeably, so stale vf
could point to different/not intended vf.
Remove redundant "v" variable and iterate via single VF pointer across
whole function instead to guarantee VF pointer validity.
CVSS Score
5.5
EPSS Score
0.0
Published
2024-05-30
In the Linux kernel, the following vulnerability has been resolved:
rtnetlink: Correct nested IFLA_VF_VLAN_LIST attribute validation
Each attribute inside a nested IFLA_VF_VLAN_LIST is assumed to be a
struct ifla_vf_vlan_info so the size of such attribute needs to be at least
of sizeof(struct ifla_vf_vlan_info) which is 14 bytes.
The current size validation in do_setvfinfo is against NLA_HDRLEN (4 bytes)
which is less than sizeof(struct ifla_vf_vlan_info) so this validation
is not enough and a too small attribute might be cast to a
struct ifla_vf_vlan_info, this might result in an out of bands
read access when accessing the saved (casted) entry in ivvl.
CVSS Score
5.5
EPSS Score
0.0
Published
2024-05-30
In the Linux kernel, the following vulnerability has been resolved:
tty: n_gsm: require CAP_NET_ADMIN to attach N_GSM0710 ldisc
Any unprivileged user can attach N_GSM0710 ldisc, but it requires
CAP_NET_ADMIN to create a GSM network anyway.
Require initial namespace CAP_NET_ADMIN to do that.
CVSS Score
5.5
EPSS Score
0.0
Published
2024-05-24
GStreamer EXIF Metadata Parsing Integer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.
The specific flaw exists within the parsing of EXIF metadata. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
. Was ZDI-CAN-23896.
CVSS Score
7.8
EPSS Score
0.036
Published
2024-05-22
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: Fix even more out of bound writes from debugfs
CVE-2021-42327 was fixed by:
commit f23750b5b3d98653b31d4469592935ef6364ad67
Author: Thelford Williams <tdwilliamsiv@gmail.com>
Date: Wed Oct 13 16:04:13 2021 -0400
drm/amdgpu: fix out of bounds write
but amdgpu_dm_debugfs.c contains more of the same issue so fix the
remaining ones.
v2:
* Add missing fix in dp_max_bpc_write (Harry Wentland)
CVSS Score
7.8
EPSS Score
0.0
Published
2024-05-22