CVE-2019-3461
Debian tmpreaper version 1.6.13+nmu1 has a race condition when doing a (bind) mount via rename() which could result in local privilege escalation.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.25%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Debian tmpreaper version 1.6.13+nmu1 has a race condition when doing a (bind) mount via rename() which could result in local privilege escalation. Mounting via rename() could potentially lead to a file being placed elsewhereon the filesystem hierarchy (e.g. /etc/cron.d/) if the directory being cleaned up was on the same physical filesystem. Fixed versions include 1.6.13+nmu1+deb9u1 and 1.6.14.
- CVSS 3.0
- 7.0 HIGHCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.25% probability · 17th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- debian/tmpreaper · debian/debian linux
- Source
- security@debian.org
References
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=918956Mailing List, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2019/01/msg00017.htmlVendor Advisory
- https://lists.debian.org/debian-security-announce/2019/msg00003.htmlMailing List, Vendor Advisory
- https://usn.ubuntu.com/4077-1/
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=918956Mailing List, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2019/01/msg00017.htmlVendor Advisory
- https://lists.debian.org/debian-security-announce/2019/msg00003.htmlMailing List, Vendor Advisory
- https://usn.ubuntu.com/4077-1/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.