CVE-2021-3178
low
CVSS v3
—
CVSS v2
—
VIR risk
2.5
Description
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
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-3178
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-3178.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 5.4.92-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 5.10.12-1 |
| debian | bullseye | fixed | 5.10.12-1 |
| debian | forky | fixed | 5.10.12-1 |
| debian | sid | fixed | 5.10.12-1 |
| debian | trixie | fixed | 5.10.12-1 |
References
Verify integrity in audit chain (admin only). AS-IS.