QEMU cirrus_vga_rop.h out-of-bounds

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 the function cirrus_bitblt_rop_fwd_transp_/cirrus_bitblt_rop_fwd_ of the file hw/display/cirrus_vga_rop.h. Such manipulation leads to out-of-bounds. This vulnerability is listed as CVE-2017-7718. The attack must be carried out locally. There is no available exploit. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in QEMU (Virtualization Software) (the affected version unknown) and classified as problematic. Affected by this issue is the function cirrus_bitblt_rop_fwd_transp_/cirrus_bitblt_rop_fwd_ of the file hw/display/cirrus_vga_rop.h. 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:

hw/display/cirrus_vga_rop.h in QEMU (aka Quick Emulator) allow local guest OS privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors related to copying VGA data via the cirrus_bitblt_rop_fwd_transp_ and cirrus_bitblt_rop_fwd_ functions.

The bug was discovered 04/19/2017. The weakness was presented 04/20/2017 with Huawei (oss-sec). The advisory is available at openwall.com. This vulnerability is handled as CVE-2017-7718 since 04/12/2017. Local access is required to approach this attack. A simple authentication is necessary for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 100068 (CentOS 6 : qemu-kvm (CESA-2017:1206)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170142 (SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2017:1774-1)).

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 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (100068) and SecurityFocus (BID 97957†). See VDB-98316, VDB-99556, VDB-100808 and VDB-100809 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Website

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: 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: 100068
Nessus Name: CentOS 6 : qemu-kvm (CESA-2017:1206)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 871165
OpenVAS Name: RedHat Update for qemu-kvm RHSA-2017:1206-01
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: 215902d7b6fb50c6fc216fc74f770858278ed904

Timelineinfo

04/12/2017 🔍
04/19/2017 +7 days 🔍
04/19/2017 +0 days 🔍
04/20/2017 +1 days 🔍
04/20/2017 +0 days 🔍
04/21/2017 +1 days 🔍
05/09/2017 +18 days 🔍
05/10/2017 +1 days 🔍
12/01/2022 +2031 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: RHSA-2017:1206
Researcher: Jiangxin
Organization: Huawei
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-7718 (🔍)
GCVE (CVE): GCVE-0-2017-7718
GCVE (VulDB): GCVE-100-100418
SecurityFocus: 97957 - QEMU 'hw/display/cirrus_vga_rop.h' Multiple Memory Corruption Vulnerabilities
OSVDB: - CVE-2017-7718 - QEMU - Out-of-Bounds Read Issue

See also: 🔍

Entryinfo

Created: 04/21/2017 10:17
Updated: 12/01/2022 16:22
Changes: 04/21/2017 10:17 (77), 09/19/2020 10:09 (6), 12/21/2020 12:03 (3), 12/01/2022 16:14 (4), 12/01/2022 16:22 (1)
Complete: 🔍
Cache ID: 216:AB8:103

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