CVE-2017-9524 : The qemu-nbd server in QEMU (aka Quick Emulator), when built with the Network Bl

The qemu-nbd server in QEMU (aka Quick Emulator), when built with the Network Block Device (NBD) Server support, allows remote attackers to cause a denial of service (segmentation fault and server crash) by leveraging failure to ensure that all initialization occurs before talking to a client in the nbd_negotiate function.

Published 2017-07-06 16:29:00

Updated 2020-10-29 17:24:28

Source MITRE

View at NVD, CVE.org

Vulnerability category: Memory CorruptionInput validationDenial of service

Products affected by CVE-2017-9524

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Qemu » Qemu
Versions up to, including, (<=) 2.9.1
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2017-9524

EPSS FAQ

2.44%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 90 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2017-9524

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2017-9524

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2017-9524

https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg06240.html

[Qemu-devel] [PATCH] nbd: Fully initialize client in case of failed nego
Patch;Third Party Advisory
http://www.debian.org/security/2017/dsa-3925

Debian -- Security Information -- DSA-3925-1 qemu
Third Party Advisory

CVEs referencing this url
http://www.openwall.com/lists/oss-security/2017/06/12/1

oss-security - CVE-2017-9524 Qemu: nbd: segmentation fault due to client non-negotiation
Mailing List;Patch;Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1682

RHSA-2017:1682 - Security Advisory - Red Hat Customer Portal
Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2408

RHSA-2017:2408 - Security Advisory - Red Hat Customer Portal
Third Party Advisory

CVEs referencing this url
http://www.securityfocus.com/bid/99011

QEMU CVE-2017-9524 Denial of Service Vulnerability
Third Party Advisory;VDB Entry
https://lists.gnu.org/archive/html/qemu-devel/2017-06/msg02321.html

[Qemu-devel] [PATCH] nbd: Fix regression on resiliency to port scan
Patch;Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1681

RHSA-2017:1681 - Security Advisory - Red Hat Customer Portal
Third Party Advisory

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Vulnerability Details : CVE-2017-9524

Products affected by CVE-2017-9524

Exploit prediction scoring system (EPSS) score for CVE-2017-9524

CVSS scores for CVE-2017-9524

CWE ids for CVE-2017-9524

References for CVE-2017-9524