QEMU VNC Display Driver ui/vnc.c SetPixelFormat Message numeric error

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in QEMU. It has been classified as problematic. This issue affects some unknown processing of the file ui/vnc.c of the component VNC Display Driver. The manipulation as part of SetPixelFormat Message leads to numeric error. This vulnerability is uniquely identified as CVE-2015-8504. The attack is possible to be carried out remotely. No exploit exists. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in QEMU (Virtualization Software) (unknown version). This issue affects an unknown code block of the file ui/vnc.c of the component VNC Display Driver. The manipulation as part of a SetPixelFormat Message leads to a numeric error vulnerability. Using CWE to declare the problem leads to CWE-189. Impacted is availability. The summary by CVE is:

Qemu, when built with VNC display driver support, allows remote attackers to cause a denial of service (arithmetic exception and application crash) via crafted SetPixelFormat messages from a client.

The bug was discovered 12/08/2015. The weakness was disclosed 04/11/2017 by Prasad J Pandit (oss-sec). It is possible to read the advisory at openwall.com. The identification of this vulnerability is CVE-2015-8504 since 12/08/2015. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 62 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 88628 (Debian DSA-3469-1 : qemu - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168775 (SUSE Enterprise Linux Security update for xen (SUSE-SU-2016:1154-1)).

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 before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (88628) and SecurityFocus (BID 78708†). The entries VDB-13216, VDB-13276, VDB-13279 and VDB-13280 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 88628
Nessus Name: Debian DSA-3469-1 : qemu - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703469
OpenVAS Name: Debian Security Advisory DSA 3469-1 (qemu - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.qemu-project.org

Timelineinfo

12/08/2015 🔍
12/08/2015 +0 days 🔍
12/08/2015 +0 days 🔍
02/08/2016 +62 days 🔍
02/09/2016 +1 days 🔍
04/11/2017 +427 days 🔍
04/11/2017 +0 days 🔍
04/12/2017 +1 days 🔍
08/29/2020 +1235 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: openwall.com
Researcher: Prasad J Pandit
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8504 (🔍)
GCVE (CVE): GCVE-0-2015-8504
GCVE (VulDB): GCVE-100-99587
SecurityFocus: 78708 - QEMU 'ui/vnc.c' Denial of Service Vulnerability
OSVDB: - CVE-2015-8504 - QEMU - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 04/12/2017 10:01
Updated: 08/29/2020 09:36
Changes: 04/12/2017 10:01 (79), 08/29/2020 09:36 (3)
Complete: 🔍
Cache ID: 216:030:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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