Out-of-bounds Read in Qemu
CVE-2018-7550
The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than mh_bss_end_addr, which triggers an out-of-bounds read or write memory access.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (47.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Qemu
- Canonical Ubuntu Linux — versions 14.04, 16.04, 17.10
- Debian Linux — versions 7.0, 8.0, 9.0
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Server — versions 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.6, 7.7
- Red Hat Enterprise Linux Server Eus — versions 7.5, 7.6, 7.7
- Red Hat Enterprise Linux Server Tus — versions 7.6, 7.7
- Red Hat Enterprise Linux Workstation — versions 7.0
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2018:1369 (vendor-advisory, Third Party Advisory)
- lists.gnu.org/archive/html/qemu-devel/2018-02/msg06890.html (mailing-list, Patch, Mailing List)
- lists.debian.org/debian-lts-announce/2018/04/msg00016.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3649-1/ (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/09/msg00007.html (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2018/dsa-4213 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/04/msg00015.html (mailing-list, Mailing List, Third Party Advisory)
- www.securityfocus.com/bid/103181 (VDB Entry, Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (Issue Tracking, Vendor Advisory)
- access.redhat.com/errata/RHSA-2018:2462 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-7550?
- CVE-2018-7550 is a high-severity vulnerability in Qemu, classified under Out-of-bounds Read. CVSS score: 8.8/10. Published 2018-03-01.
- How severe is CVE-2018-7550?
- High severity. CVSS v3 base score is 8.8 out of 10.