Track vulnerabilities like this one. Sign up free to get alerted when software you use is affected.

CVE-2017-18043: QEMU crash caused by integer overflow in ROUND_UP

CVE-2017-18043 · published 8 years ago

Summary

The QEMU virtual machine program can be forced to stop working when a specially crafted value triggers an arithmetic error in its ROUND_UP calculation. This makes the QEMU process crash, causing a denial of service for any workloads running inside it. Apply the latest updates from your Linux distribution (Debian or Ubuntu) to fix the problem.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software

Vendor	Product	Affected versions
qemu	qemu	>= 1.5.0, <= 2.10.1 `cpe:2.3:a:qemu:qemu::::::::`
debian	debian_linux	9.0 `cpe:2.3:o:debian:debian_linux:9.0:::::::*`
canonical	ubuntu_linux	14.04 16.04 17.10 `cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::`

Original advisory text

Integer overflow in the macro ROUND_UP (n, d) in Quick Emulator (Qemu) allows a user to cause a denial of service (Qemu process crash).

References

http://www.openwall.com/lists/oss-security/2018/01/19/1 Mailing List Third Party Advisory
http://www.securityfocus.com/bid/102759 Third Party Advisory VDB Entry
https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=2098b073f398cd628c09c5a78537a685...
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html Third Party Advisory
https://usn.ubuntu.com/3575-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4213 Third Party Advisory

Fix within

Internet-facing 60 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit (estimated)
Gives an attacker partial control (estimated)

Severity

5.5 Medium

Exploitation

<1% chance of attack within 30 days

Type

CWE-190Integer Overflow

Timeline

Published31 Jan 2018

Updated4 Nov 2026

First seen29 Sep 2026

Sources

CVE-2017-18043 · NVD

Track software like this

Free during beta