QEMU virtio-crypto.c integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in QEMU. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file hw/virtio/virtio-crypto.c. The manipulation results in integer overflow. This vulnerability is known as CVE-2017-5931. Attacking locally is a requirement. No exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as critical has been found in QEMU (Virtualization Software) (version now known). Affected is some unknown processing of the file hw/virtio/virtio-crypto.c. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Integer overflow in hw/virtio/virtio-crypto.c in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code on the host via a crafted virtio-crypto request, which triggers a heap-based buffer overflow.

The bug was discovered 02/07/2017. The weakness was published 03/27/2017 by Li Qiang with 360.cn Inc. (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2017-5931 since 02/07/2017. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 14 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 97271 (GLSA-201702-28 : QEMU: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.qemu-project.org. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (97271) and SecurityFocus (BID 96141†). Similar entries are available at VDB-98151, VDB-98123, VDB-98146 and VDB-98147. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 97271
Nessus Name: GLSA-201702-28 : QEMU: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: a08aaff811fb194950f79711d2afe5a892ae03a4

Timelineinfo

02/07/2017 🔍
02/07/2017 +0 days 🔍
02/07/2017 +0 days 🔍
02/21/2017 +14 days 🔍
02/21/2017 +0 days 🔍
03/27/2017 +34 days 🔍
03/27/2017 +0 days 🔍
03/28/2017 +1 days 🔍
11/22/2022 +2065 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: openwall.com
Researcher: Li Qiang
Organization: 360.cn Inc.
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-5931 (🔍)
GCVE (CVE): GCVE-0-2017-5931
GCVE (VulDB): GCVE-100-99000
SecurityFocus: 96141 - QEMU 'virtio-crypto.c' Integer Overflow Vulnerability
OSVDB: - CVE-2017-5931 - QEMU - Integer Overflow Issue

See also: 🔍

Entryinfo

Created: 03/28/2017 22:22
Updated: 11/22/2022 18:42
Changes: 03/28/2017 22:22 (73), 08/23/2020 14:08 (3), 11/22/2022 18:42 (4)
Complete: 🔍
Cache ID: 216::103

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