Fabrice Bellard QEMU CD/DVD-ROM Emulator access control

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.0$5k-$25k0.00

A vulnerability classified as problematic was found in Fabrice Bellard QEMU (Virtualization Software) (affected version unknown). Affected by this vulnerability is an unknown part of the component CD/DVD-ROM Emulator. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect availability.

The weakness was shared 09/11/2015 as Bug 1260080 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2015-6855 since 09/10/2015. The exploitation appears to be easy. The attack needs to be done within the local network. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 04/18/2018). MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 86408 (Fedora 22 : xen-4.5.1-10.fc22 (2015-4896530727)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168804 (SUSE Enterprise Linux Security update for xen (SUSE-SU-2016:1318-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 76691), X-Force (106313), Vulnerability Center (SBV-54494) and Tenable (86408). Additional details are provided at seclists.org. The entries 13272, 13273, 13275 and 74129 are related to this item.

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VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.0

VulDB Base Score: 4.3
VulDB Temp Score: 4.0
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Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-264
ATT&CK: T1068

Local: No
Remote: Partially

Availability: 🔍
Status: Unproven

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Current Price Estimation: 🔍

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Nessus ID: 86408
Nessus Name: Fedora 22 : xen-4.5.1-10.fc22 (2015-4896530727)
Nessus File: 🔍
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OpenVAS ID: 703361
OpenVAS Name: Debian Security Advisory DSA 3361-1 (qemu - security update)
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Countermeasuresinfoedit

Recommended: Upgrade
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Timelineinfoedit

09/10/2015 🔍
09/10/2015 +0 days 🔍
09/10/2015 +0 days 🔍
09/11/2015 +1 days 🔍
09/14/2015 +3 days 🔍
10/14/2015 +30 days 🔍
10/16/2015 +2 days 🔍
11/06/2015 +21 days 🔍
11/19/2015 +13 days 🔍
11/14/2017 +726 days 🔍
04/18/2018 +155 days 🔍

Sourcesinfoedit

Vendor: https://bellard.org/

Advisory: Bug 1260080
Status: Not defined

CVE: CVE-2015-6855 (🔍)
OVAL: 🔍

SecurityFocus: 76691 - QEMU 'hw/ide/core.c' Denial of Service Vulnerability
X-Force: 106313 - Qemu emulator denial of service
Vulnerability Center: 54494 - QEMU <2.0.2 Remote DoS or Other Impact due to Divide-by-Zero via IDE Commands, Critical

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Entryinfoedit

Created: 09/14/2015 12:08 PM
Updated: 04/18/2018 02:00 PM
Changes: (11) vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai countermeasure_name countermeasure_date source_cve_assigned source_securityfocus_date source_securityfocus_class
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