QEMU hw/9pfs/9p.c v9fs_xattr_read/v9fs_xattr_write out-of-bounds

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4.3$0-$5k0.00

Summaryinfo

A vulnerability was found in QEMU. It has been declared as problematic. Affected is the function v9fs_xattr_read/v9fs_xattr_write of the file hw/9pfs/9p.c. Such manipulation leads to out-of-bounds. This vulnerability is documented as CVE-2016-9104. The attack needs to be performed locally. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in QEMU (Virtualization Software) (version now known). Affected by this issue is the function v9fs_xattr_read/v9fs_xattr_write of the file hw/9pfs/9p.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability. CVE summarizes:

Multiple integer overflows in the (1) v9fs_xattr_read and (2) v9fs_xattr_write functions in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allow local guest OS administrators to cause a denial of service (QEMU process crash) via a crafted offset, which triggers an out-of-bounds access.

The bug was discovered 12/09/2016. The weakness was released 12/09/2016 by Li Qiang with 360.cn Inc. (Website). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2016-9104 since 10/28/2016. The attack needs to be approached locally. Required for exploitation is a simple authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 95316 (SUSE SLES11 Security Update : kvm (SUSE-SU-2016:2902-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169412 (SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2016:2988-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (95316) and SecurityFocus (BID 93956†). Entries connected to this vulnerability are available at VDB-92455, VDB-93308, VDB-93309 and VDB-93310. 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: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.4
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / 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: 95316
Nessus Name: SUSE SLES11 Security Update : kvm (SUSE-SU-2016:2902-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 65785
OpenVAS Name: SuSE Update for qemu openSUSE-SU-2016:3103-1 (qemu)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/28/2016 🔍
10/28/2016 +0 days 🔍
11/24/2016 +27 days 🔍
11/25/2016 +1 days 🔍
12/09/2016 +14 days 🔍
12/09/2016 +0 days 🔍
12/09/2016 +0 days 🔍
12/10/2016 +1 days 🔍
10/05/2022 +2125 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: DLA 1599-1
Researcher: Li Qiang
Organization: 360.cn Inc.
Status: Not defined

CVE: CVE-2016-9104 (🔍)
GCVE (CVE): GCVE-0-2016-9104
GCVE (VulDB): GCVE-100-94016
SecurityFocus: 93956 - QEMU 'hw/9pfs/9p.c' Integer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 12/10/2016 13:38
Updated: 10/05/2022 12:27
Changes: 12/10/2016 13:38 (62), 06/22/2019 20:35 (16), 10/05/2022 12:27 (4)
Complete: 🔍
Cache ID: 216::103

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