UBUNTU-CVE-2023-4194
A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to bypass network filters and gain unauthorized access to some resources. The original patches fixing CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits - a096ccca6e50 ("tun: tun_chr_open(): correctly initialize socket uid"), - 66b2c338adce ("tap: tap_open(): correctly initialize socket uid"), pass "inode->i_uid" to sock_init_data_uid() as the last parameter and that turns out to not be accurate.
02 / AFFECTED SOFTWARE
Affected packages
34 explicit affected versions
14 explicit affected versions
29 explicit affected versions
77 explicit affected versions
77 explicit affected versions
1 explicit affected versions
24 explicit affected versions
7 explicit affected versions
7 explicit affected versions
26 explicit affected versions
25 explicit affected versions
32 explicit affected versions
37 explicit affected versions
4 explicit affected versions
66 explicit affected versions
10 explicit affected versions
7 explicit affected versions
10 explicit affected versions
13 explicit affected versions
6 explicit affected versions
18 explicit affected versions
37 explicit affected versions
8 explicit affected versions
4 explicit affected versions
63 explicit affected versions
8 explicit affected versions
12 explicit affected versions
23 explicit affected versions
7 explicit affected versions
35 explicit affected versions
33 explicit affected versions
32 explicit affected versions
16 explicit affected versions
15 explicit affected versions
12 explicit affected versions
38 explicit affected versions
51 explicit affected versions
13 explicit affected versions
3 explicit affected versions
35 explicit affected versions
10 explicit affected versions
13 explicit affected versions
10 explicit affected versions
32 explicit affected versions
1 explicit affected versions
8 explicit affected versions
21 explicit affected versions
6 explicit affected versions
13 explicit affected versions
74 explicit affected versions
7 explicit affected versions
30 explicit affected versions
29 explicit affected versions
12 explicit affected versions
65 explicit affected versions
61 explicit affected versions
25 explicit affected versions
76 explicit affected versions
11 explicit affected versions
23 explicit affected versions
36 explicit affected versions
20 explicit affected versions
5 explicit affected versions
54 explicit affected versions
74 explicit affected versions
46 explicit affected versions
26 explicit affected versions
12 explicit affected versions
44 explicit affected versions
24 explicit affected versions
9 explicit affected versions
4 explicit affected versions
29 explicit affected versions
4 explicit affected versions
9 explicit affected versions
31 explicit affected versions
12 explicit affected versions
21 explicit affected versions
31 explicit affected versions
38 explicit affected versions
13 explicit affected versions
24 explicit affected versions
7 explicit affected versions
24 explicit affected versions
42 explicit affected versions
85 explicit affected versions
72 explicit affected versions
35 explicit affected versions
27 explicit affected versions
65 explicit affected versions
18 explicit affected versions
3 explicit affected versions
16 explicit affected versions
43 explicit affected versions
22 explicit affected versions
8 explicit affected versions
11 explicit affected versions
64 explicit affected versions
25 explicit affected versions
2 explicit affected versions
5 explicit affected versions
35 explicit affected versions
12 explicit affected versions
31 explicit affected versions
19 explicit affected versions
16 explicit affected versions
6 explicit affected versions
12 explicit affected versions
50 explicit affected versions
12 explicit affected versions
5 explicit affected versions
12 explicit affected versions
7 explicit affected versions
35 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to bypass network filters and gain unauthorized access to some resources. The original patches fixing CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits - a096ccca6e50 ("tun: tun_chr_open(): correctly initialize socket uid"), - 66b2c338adce ("tap: tap_open(): correctly initialize socket uid"), pass "inode->i_uid" to sock_init_data_uid() as the last parameter and that turns out to not be accurate.
05 / REFERENCES
Further evidence
- https://access.redhat.com/security/cve/CVE-2023-4194
- https://git.kernel.org/linus/5c9241f3ceab3257abe2923a59950db0dc8bb737
- https://git.kernel.org/linus/9bc3047374d5bec163e83e743709e23753376f0c
- https://lore.kernel.org/all/[email protected]/
- https://lore.kernel.org/all/[email protected]/
- https://lore.kernel.org/all/[email protected]/
- https://ubuntu.com/security/CVE-2023-4194
- https://ubuntu.com/security/notices/USN-6343-1
- https://ubuntu.com/security/notices/USN-6385-1
- https://ubuntu.com/security/notices/USN-6412-1
- https://ubuntu.com/security/notices/USN-6416-1
- https://ubuntu.com/security/notices/USN-6416-2
- https://ubuntu.com/security/notices/USN-6416-3
- https://ubuntu.com/security/notices/USN-6417-1
- https://ubuntu.com/security/notices/USN-6445-1
- https://ubuntu.com/security/notices/USN-6445-2
- https://ubuntu.com/security/notices/USN-6466-1
- https://www.cve.org/CVERecord?id=CVE-2023-4194