QEMU IOCTL Call block/iscsi.c iscsi_aio_ioctl memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in QEMU. This impacts the function iscsi_aio_ioctl of the file block/iscsi.c of the component IOCTL Call Handler. Executing a manipulation can lead to memory corruption. This vulnerability is tracked as CVE-2016-5126. The attack is restricted to local execution. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in QEMU (Virtualization Software) (affected version not known). It has been declared as critical. This vulnerability affects the function iscsi_aio_ioctl of the file block/iscsi.c of the component IOCTL Call Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Heap-based buffer overflow in the iscsi_aio_ioctl function in block/iscsi.c in QEMU allows local OS guest users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call.

The weakness was disclosed 06/01/2016 by Prasad J Pandit (Website). The advisory is shared for download at lists.gnu.org. This vulnerability was named CVE-2016-5126 since 05/30/2016. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 92935 (Oracle Linux 7 : qemu-kvm (ELSA-2016-1606)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196546 (Ubuntu Security Notification for Qemu, Qemu-kvm Vulnerabilities (USN-3047-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (92935) and SecurityFocus (BID 90948†). The entries VDB-87919, VDB-87920, VDB-87921 and VDB-90386 are pretty similar. 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: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 92935
Nessus Name: Oracle Linux 7 : qemu-kvm (ELSA-2016-1606)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 66197
OpenVAS Name: SuSE Update for xen openSUSE-SU-2016:2497-1 (xen)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: a6b3167fa0e825aebb5a7cd8b437b6d41584a196

Timelineinfo

05/30/2016 🔍
05/30/2016 +0 days 🔍
06/01/2016 +2 days 🔍
06/01/2016 +0 days 🔍
06/02/2016 +1 days 🔍
08/11/2016 +70 days 🔍
08/12/2016 +1 days 🔍
08/22/2022 +2201 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: RHSA-2016:1606
Researcher: Prasad J Pandit
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-5126 (🔍)
GCVE (CVE): GCVE-0-2016-5126
GCVE (VulDB): GCVE-100-87712
SecurityFocus: 90948 - QEMU 'block/iscsi.c' Heap Based Buffer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 06/02/2016 13:24
Updated: 08/22/2022 18:04
Changes: 06/02/2016 13:24 (65), 12/27/2018 11:29 (15), 08/22/2022 17:48 (5), 08/22/2022 17:56 (1), 08/22/2022 18:04 (1)
Complete: 🔍
Cache ID: 216::103

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