QEMU CD/DVD-ROM Emulator null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.8$0-$5k0.00

A vulnerability was found in QEMU (Virtualization Software) (the affected version unknown). It has been classified as problematic. This affects an unknown part of the component CD/DVD-ROM Emulator. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. The summary by CVE is:

QEMU (aka Quick Emulator), when built with the IDE disk and CD/DVD-ROM Emulator support, allows local guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process crash) by flushing an empty CDROM device drive.

The bug was discovered 08/21/2017. The weakness was published 08/23/2017 by ryan with Palo Alto Networks (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is uniquely identified as CVE-2017-12809 since 08/11/2017. Attacking locally is a requirement. A authentication is necessary for exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 103217 (Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : qemu vulnerabilities (USN-3414-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157870 (Oracle Enterprise Linux Security Update for qemu (ELSA-2018-4285)).

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

The vulnerability is also documented in the vulnerability database at Tenable (103217). Similar entries are available at 104779, 104780, 105918 and 106077.

Productinfo

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Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.8

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 103217
Nessus Name: Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : qemu vulnerabilities (USN-3414-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for qemu USN-3414-2
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: 🔍

Timelineinfo

08/11/2017 🔍
08/21/2017 +10 days 🔍
08/21/2017 +0 days 🔍
08/23/2017 +2 days 🔍
08/23/2017 +0 days 🔍
08/24/2017 +1 days 🔍
09/13/2017 +20 days 🔍
09/14/2017 +1 days 🔍
12/16/2022 +1919 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: USN-3414-1
Researcher: ryan
Organization: Palo Alto Networks
Status: Confirmed

CVE: CVE-2017-12809 (🔍)
OVAL: 🔍

SecurityFocus: 100451 - Qemu CVE-2017-12809 Null Pointer Dereference Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 08/24/2017 10:36
Updated: 12/16/2022 12:45
Changes: 08/24/2017 10:36 (68), 11/09/2019 19:36 (13), 12/16/2022 12:45 (4)
Complete: 🔍

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