Vulnerability in Debian Gnu/linux Tmpreaper
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. 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.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (15.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Debian Gnu/linux Tmpreaper — versions 1.6.13+nmu1
- Debian Linux — versions 8.0, 9.0
- Debian Tmpreaper — versions 1.6.13\+nmu1, 1.6.13+nmu1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.debian.org/debian-lts-announce/2019/01/msg00017.html (Vendor Advisory, mailing-list)
- bugs.debian.org/cgi-bin/bugreport.cgi (Mailing List, Vendor Advisory)
- lists.debian.org/debian-security-announce/2019/msg00003.html (vendor-advisory, Mailing List, Vendor Advisory)
- usn.ubuntu.com/4077-1/ (vendor-advisory)
Frequently asked questions
- What is CVE-2019-3461?
- CVE-2019-3461 is a high-severity vulnerability in Debian Gnu/linux Tmpreaper, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.0/10. Published 2019-02-04.
- How severe is CVE-2019-3461?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2019-3461 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.