Out-of-bounds Read in Qemu
CVE-2018-5683
The vga_draw_text function in Qemu allows local OS guest privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) by leveraging improper memory address validation.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (50.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Qemu
- Canonical Ubuntu Linux — versions 14.04, 16.04, 17.10
- Debian Linux — versions 8.0, 9.0
- Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
- Red Hat Enterprise Linux Server — versions 6.0, 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.6, 7.7
- Red Hat Enterprise Linux Server Eus — versions 7.6, 7.7
- Red Hat Enterprise Linux Server Tus — versions 7.6, 7.7
- Red Hat Enterprise Linux Workstation — versions 6.0, 7.0
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2018:2162 (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)
- access.redhat.com/errata/RHSA-2018:0816 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1104 (vendor-advisory, Third Party Advisory)
- lists.gnu.org/archive/html/qemu-devel/2018-01/msg02597.html (mailing-list, Exploit, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3575-1/ (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/102518 (VDB Entry, Third Party Advisory, vdb-entry)
- www.openwall.com/lists/oss-security/2018/01/15/2 (mailing-list, Patch, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-5683?
- CVE-2018-5683 is a medium-severity vulnerability in Qemu, classified under Out-of-bounds Read. CVSS score: 6.0/10. Published 2018-01-23.
- How severe is CVE-2018-5683?
- Medium severity. CVSS v3 base score is 6.0 out of 10.