UBUNTU-CVE-2023-34319
The fix for XSA-423 added logic to Linux'es netback driver to deal with a frontend splitting a packet in a way such that not all of the headers would come in one piece. Unfortunately the logic introduced there didn't account for the extreme case of the entire packet being split into as many pieces as permitted by the protocol, yet still being smaller than the area that's specially dealt with to keep all (possible) headers together. Such an unusual packet would therefore trigger a buffer overrun in the driver.
02 / AFFECTED SOFTWARE
Affected packages
20 explicit affected versions
30 explicit affected versions
50 explicit affected versions
6 explicit affected versions
12 explicit affected versions
6 explicit affected versions
39 explicit affected versions
25 explicit affected versions
47 explicit affected versions
36 explicit affected versions
25 explicit affected versions
32 explicit affected versions
7 explicit affected versions
33 explicit affected versions
73 explicit affected versions
55 explicit affected versions
35 explicit affected versions
9 explicit affected versions
18 explicit affected versions
85 explicit affected versions
19 explicit affected versions
75 explicit affected versions
13 explicit affected versions
4 explicit affected versions
23 explicit affected versions
90 explicit affected versions
1 explicit affected versions
21 explicit affected versions
16 explicit affected versions
6 explicit affected versions
30 explicit affected versions
7 explicit affected versions
12 explicit affected versions
23 explicit affected versions
12 explicit affected versions
7 explicit affected versions
64 explicit affected versions
12 explicit affected versions
78 explicit affected versions
86 explicit affected versions
12 explicit affected versions
75 explicit affected versions
4 explicit affected versions
156 explicit affected versions
37 explicit affected versions
89 explicit affected versions
5 explicit affected versions
13 explicit affected versions
16 explicit affected versions
26 explicit affected versions
13 explicit affected versions
2 explicit affected versions
29 explicit affected versions
67 explicit affected versions
13 explicit affected versions
36 explicit affected versions
62 explicit affected versions
35 explicit affected versions
78 explicit affected versions
33 explicit affected versions
23 explicit affected versions
10 explicit affected versions
83 explicit affected versions
11 explicit affected versions
12 explicit affected versions
106 explicit affected versions
7 explicit affected versions
8 explicit affected versions
77 explicit affected versions
25 explicit affected versions
17 explicit affected versions
99 explicit affected versions
33 explicit affected versions
119 explicit affected versions
10 explicit affected versions
12 explicit affected versions
8 explicit affected versions
106 explicit affected versions
36 explicit affected versions
36 explicit affected versions
26 explicit affected versions
3 explicit affected versions
60 explicit affected versions
43 explicit affected versions
51 explicit affected versions
59 explicit affected versions
12 explicit affected versions
24 explicit affected versions
14 explicit affected versions
10 explicit affected versions
64 explicit affected versions
8 explicit affected versions
5 explicit affected versions
8 explicit affected versions
6 explicit affected versions
66 explicit affected versions
13 explicit affected versions
32 explicit affected versions
7 explicit affected versions
61 explicit affected versions
28 explicit affected versions
10 explicit affected versions
8 explicit affected versions
12 explicit affected versions
65 explicit affected versions
44 explicit affected versions
16 explicit affected versions
1 explicit affected versions
13 explicit affected versions
26 explicit affected versions
22 explicit affected versions
37 explicit affected versions
38 explicit affected versions
26 explicit affected versions
9 explicit affected versions
26 explicit affected versions
11 explicit affected versions
133 explicit affected versions
33 explicit affected versions
3 explicit affected versions
7 explicit affected versions
67 explicit affected versions
37 explicit affected versions
110 explicit affected versions
89 explicit affected versions
4 explicit affected versions
1 explicit affected versions
31 explicit affected versions
82 explicit affected versions
43 explicit affected versions
32 explicit affected versions
112 explicit affected versions
133 explicit affected versions
10 explicit affected versions
8 explicit affected versions
9 explicit affected versions
66 explicit affected versions
4 explicit affected versions
55 explicit affected versions
1 explicit affected versions
36 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
The fix for XSA-423 added logic to Linux'es netback driver to deal with a frontend splitting a packet in a way such that not all of the headers would come in one piece. Unfortunately the logic introduced there didn't account for the extreme case of the entire packet being split into as many pieces as permitted by the protocol, yet still being smaller than the area that's specially dealt with to keep all (possible) headers together. Such an unusual packet would therefore trigger a buffer overrun in the driver.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/534fc31d09b706a16d83533e16b5dc855caf7576
- https://marc.info/?l=oss-security&m=169151395214375&w=2
- https://ubuntu.com/security/CVE-2023-34319
- https://ubuntu.com/security/notices/USN-6343-1
- https://ubuntu.com/security/notices/USN-6439-1
- https://ubuntu.com/security/notices/USN-6439-2
- https://ubuntu.com/security/notices/USN-6440-1
- https://ubuntu.com/security/notices/USN-6440-2
- https://ubuntu.com/security/notices/USN-6440-3
- https://ubuntu.com/security/notices/USN-6441-1
- https://ubuntu.com/security/notices/USN-6441-2
- https://ubuntu.com/security/notices/USN-6441-3
- https://ubuntu.com/security/notices/USN-6442-1
- https://ubuntu.com/security/notices/USN-6444-1
- https://ubuntu.com/security/notices/USN-6444-2
- https://ubuntu.com/security/notices/USN-6445-1
- https://ubuntu.com/security/notices/USN-6445-2
- https://ubuntu.com/security/notices/USN-6446-1
- https://ubuntu.com/security/notices/USN-6446-2
- https://ubuntu.com/security/notices/USN-6446-3
- https://ubuntu.com/security/notices/USN-6466-1
- https://www.cve.org/CVERecord?id=CVE-2023-34319
- https://xenbits.xen.org/xsa/advisory-432.html