QEMU IDE AHCI Emulation null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in QEMU. Affected is an unknown function of the component IDE AHCI Emulation. Executing a manipulation can lead to null pointer dereference. This vulnerability is registered as CVE-2016-2197. The attack needs to be launched locally. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in QEMU (Virtualization Software) (the affected version unknown) and classified as problematic. This vulnerability affects an unknown part of the component IDE AHCI Emulation. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

QEMU (aka Quick Emulator) built with an IDE AHCI emulation support is vulnerable to a null pointer dereference flaw. It occurs while unmapping the Frame Information Structure (FIS) and Command List Block (CLB) entries. A privileged user inside guest could use this flaw to crash the QEMU process instance resulting in DoS.

The bug was discovered 01/29/2016. The weakness was published 12/29/2016 by Alibaba (Website). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2016-2197 since 01/29/2016. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 23 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 89599 (Fedora 23 : qemu-2.4.1-7.fc23 (2016-b49aaf2c56)), 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 l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168962 (OpenSuSE Security Update for qemu (openSUSE-SU-2016:1750-1)).

Upgrading eliminates this vulnerability. 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 (89599) and SecurityFocus (BID 82235†). Similar entries are available at VDB-80761, VDB-80762, VDB-94718 and VDB-94719. 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: 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: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 89599
Nessus Name: Fedora 23 : qemu-2.4.1-7.fc23 (2016-b49aaf2c56)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 880768
OpenVAS Name: Ubuntu Update for qemu USN-2891-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/28/2016 🔍
01/29/2016 +1 days 🔍
01/29/2016 +0 days 🔍
02/21/2016 +23 days 🔍
03/04/2016 +12 days 🔍
12/29/2016 +300 days 🔍
12/29/2016 +0 days 🔍
12/30/2016 +1 days 🔍
10/12/2022 +2112 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: FEDORA-2016-b49aaf2c56
Researcher: Alibaba
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-2197 (🔍)
GCVE (CVE): GCVE-0-2016-2197
GCVE (VulDB): GCVE-100-94720
SecurityFocus: 82235 - QEMU 'hw/ide/ahci.c' NULL Pointer Dereference Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 12/30/2016 10:29
Updated: 10/12/2022 23:49
Changes: 12/30/2016 10:29 (67), 07/22/2019 06:48 (11), 10/12/2022 23:49 (3)
Complete: 🔍
Cache ID: 216:BE3:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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