Privilege escalation in GNU Grub2
CVE-2019-14865
A flaw was found in the grub2-set-bootflag utility of grub2. A local attacker could run this utility under resource pressure (for example by setting RLIMIT), causing grub2 configuration files to be truncated and leaving the system unbootable on subsequent reboots.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (22.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.9% 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
- GNU Grub2
- [Unknown] Grub2
- Red Hat Enterprise Linux — versions 8.0
- Red Hat Enterprise Linux Eus — versions 8.1, 8.2, 8.4
- Red Hat Enterprise Linux Server Aus — versions 8.2, 8.4, 8.6
- Red Hat Enterprise Linux Server Tus — versions 8.2, 8.4, 8.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- seclists.org/oss-sec/2019/q4/101 (Mailing List, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- access.redhat.com/errata/RHSA-2020:0335 (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2024/02/06/3 (Third Party Advisory)
Frequently asked questions
- What is CVE-2019-14865?
- CVE-2019-14865 is a medium-severity vulnerability in GNU Grub2, classified under Privilege Defined With Unsafe Actions. CVSS score: 5.9/10. Published 2019-11-29.
- How severe is CVE-2019-14865?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2019-14865 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.