Buffer overflow in Linux Kernel
CVE-2018-1120
A flaw was found affecting the Linux kernel before version 4.17. By mmap()ing a FUSE-backed file onto a process's memory containing command line arguments (or environment strings), an attacker can cause utilities from psutils or procps (such as ps, w) or any other program which makes a read() call to the /proc/<pid>/cmdline (or /proc/<pid>/environ) files to block indefinitely (denial of service) or for some controlled time (as a synchronization primitive for other attacks).
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.8 (Low). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.072 (94.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.072 · newest: 0.072 · change: 0.000
Affected products
- Linux Kernel
- [Unknown] Kernel — versions kernel 4.17
- Canonical Ubuntu Linux — versions 16.04, 18.04
- Debian Linux — versions 8.0
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Server — versions 7.0
- Red Hat Enterprise Linux Workstation — versions 7.0
- Red Hat Virtualization Host — versions 4.0
Weakness classification (CWE)
References
- usn.ubuntu.com/3752-2/ (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:3083 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/104229 (VDB Entry, Third Party Advisory, vdb-entry)
- usn.ubuntu.com/3752-3/ (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/201805-14 (vendor-advisory, Third Party Advisory)
- www.exploit-db.com/exploits/44806/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- usn.ubuntu.com/3910-1/ (vendor-advisory)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- usn.ubuntu.com/3910-2/ (vendor-advisory)
Frequently asked questions
- What is CVE-2018-1120?
- CVE-2018-1120 is a low-severity vulnerability in Linux Kernel, classified under Heap-based Buffer Overflow. CVSS score: 2.8/10. Published 2018-06-20.
- How severe is CVE-2018-1120?
- Low severity. CVSS v3 base score is 2.8 out of 10.