QEMU ROUND_UP integer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.3$0-$5k0.00

A vulnerability was found in QEMU (Virtualization Software) (affected version unknown). It has been declared as problematic. Affected by this vulnerability is the function ROUND_UP. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect availability. The summary by CVE is:

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).

The bug was discovered 01/19/2018. The weakness was disclosed 01/31/2018 with Red Hat (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2017-18043 since 01/19/2018. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 12 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106927 (Ubuntu 14.04 LTS / 16.04 LTS / 17.10 : qemu vulnerabilities (USN-3575-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197060 (Ubuntu Security Notification for Qemu Vulnerabilities (USN-3575-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.qemu.org. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106927). The entries 109658, 110190, 110312 and 111544 are pretty similar.

Productinfo

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Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 106927
Nessus Name: Ubuntu 14.04 LTS / 16.04 LTS / 17.10 : qemu vulnerabilities (USN-3575-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 870089
OpenVAS Name: Ubuntu Update for qemu USN-3575-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: 2098b073f398cd628c09c5a78537a6854

Timelineinfo

01/19/2018 🔍
01/19/2018 +0 days 🔍
01/19/2018 +0 days 🔍
01/31/2018 +12 days 🔍
01/31/2018 +0 days 🔍
02/01/2018 +1 days 🔍
02/20/2018 +19 days 🔍
02/21/2018 +1 days 🔍
02/03/2023 +1808 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: USN-3575-1
Researcher: Eric Blake
Organization: Red Hat
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-18043 (🔍)
OVAL: 🔍

SecurityFocus: 102759 - QEMU CVE-2017-18043 Local Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 02/01/2018 07:57
Updated: 02/03/2023 11:07
Changes: 02/01/2018 07:57 (77), 12/31/2019 16:21 (5), 02/02/2021 13:10 (3), 02/03/2023 11:07 (4)
Complete: 🔍

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