UBUNTU-CVE-2021-3178
fs/nfsd/nfs3xdr.c in the Linux kernel through 5.10.8, when there is an NFS export of a subdirectory of a filesystem, allows remote attackers to traverse to other parts of the filesystem via READDIRPLUS. NOTE: some parties argue that such a subdirectory export is not intended to prevent this attack; see also the exports(5) no_subtree_check default behavior
02 / AFFECTED SOFTWARE
Affected packages
90 explicit affected versions
50 explicit affected versions
6 explicit affected versions
6 explicit affected versions
57 explicit affected versions
191 explicit affected versions
58 explicit affected versions
21 explicit affected versions
39 explicit affected versions
12 explicit affected versions
69 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
15 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
1 explicit affected versions
23 explicit affected versions
31 explicit affected versions
58 explicit affected versions
22 explicit affected versions
14 explicit affected versions
10 explicit affected versions
37 explicit affected versions
8 explicit affected versions
57 explicit affected versions
36 explicit affected versions
1 explicit affected versions
3 explicit affected versions
1 explicit affected versions
25 explicit affected versions
13 explicit affected versions
53 explicit affected versions
1 explicit affected versions
25 explicit affected versions
33 explicit affected versions
10 explicit affected versions
11 explicit affected versions
92 explicit affected versions
23 explicit affected versions
2 explicit affected versions
56 explicit affected versions
19 explicit affected versions
61 explicit affected versions
1 explicit affected versions
123 explicit affected versions
3 explicit affected versions
15 explicit affected versions
69 explicit affected versions
1 explicit affected versions
18 explicit affected versions
13 explicit affected versions
1 explicit affected versions
13 explicit affected versions
1 explicit affected versions
15 explicit affected versions
6 explicit affected versions
79 explicit affected versions
12 explicit affected versions
38 explicit affected versions
44 explicit affected versions
16 explicit affected versions
8 explicit affected versions
38 explicit affected versions
9 explicit affected versions
101 explicit affected versions
13 explicit affected versions
85 explicit affected versions
36 explicit affected versions
46 explicit affected versions
7 explicit affected versions
12 explicit affected versions
43 explicit affected versions
1 explicit affected versions
12 explicit affected versions
16 explicit affected versions
4 explicit affected versions
3 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
fs/nfsd/nfs3xdr.c in the Linux kernel through 5.10.8, when there is an NFS export of a subdirectory of a filesystem, allows remote attackers to traverse to other parts of the filesystem via READDIRPLUS. NOTE: some parties argue that such a subdirectory export is not intended to prevent this attack; see also the exports(5) no_subtree_check default behavior
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51b2ee7d006a736a9126e8111d1f24e4fd0afaa6
- https://patchwork.kernel.org/project/linux-nfs/patch/[email protected]/
- https://ubuntu.com/security/CVE-2021-3178
- https://ubuntu.com/security/notices/USN-4876-1
- https://ubuntu.com/security/notices/USN-4877-1
- https://ubuntu.com/security/notices/USN-4878-1
- https://ubuntu.com/security/notices/USN-4910-1
- https://ubuntu.com/security/notices/USN-4912-1
- https://www.cve.org/CVERecord?id=CVE-2021-3178