CVE-2018-20482
low
CVSS v3
—
CVSS v2
—
VIR risk
2.5
Description
GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root).
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2018-20482
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2018-20482.html
Vendor advisory: arch — https://security.archlinux.org/ASA-201901-1
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 1.31-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 1.30+dfsg-3.1 |
| debian | bullseye | fixed | 1.30+dfsg-3.1 |
| debian | forky | fixed | 1.30+dfsg-3.1 |
| debian | sid | fixed | 1.30+dfsg-3.1 |
| debian | trixie | fixed | 1.30+dfsg-3.1 |
References
Verify integrity in audit chain (admin only). AS-IS.