QEMU Bluetooth Subsystem Negative Value integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in QEMU. It has been classified as critical. This affects an unknown part of the component Bluetooth Subsystem. This manipulation as part of Negative Value causes integer overflow. This vulnerability is tracked as CVE-2018-19665. The attack is only possible within the local network. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in QEMU (Virtualization Software) (unknown version). Affected by this vulnerability is an unknown code block of the component Bluetooth Subsystem. The manipulation as part of a Negative Value leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The Bluetooth subsystem in QEMU mishandles negative values for length variables, leading to memory corruption.

The bug was discovered 11/29/2018. The weakness was disclosed 12/06/2018 by Arash Tohidi (oss-sec). The advisory is shared at openwall.com. This vulnerability is known as CVE-2018-19665 since 11/29/2018. The exploitation appears to be easy. Access to the local network is required for this attack. The requirement for exploitation is a single authentication. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 120983 (SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2019:0003-1)), 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 171796 (SUSE Enterprise Linux Security Update for xen (SUSE-SU-2019:13921-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (120983) and SecurityFocus (BID 106050†). The entry VDB-127719 is pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.7
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 120983
Nessus Name: SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2019:0003-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

11/29/2018 🔍
11/29/2018 +0 days 🔍
11/29/2018 +0 days 🔍
12/06/2018 +7 days 🔍
12/06/2018 +0 days 🔍
12/07/2018 +1 days 🔍
01/02/2019 +26 days 🔍
01/07/2019 +5 days 🔍
04/18/2020 +467 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: openwall.com
Researcher: Arash Tohidi
Status: Confirmed

CVE: CVE-2018-19665 (🔍)
GCVE (CVE): GCVE-0-2018-19665
GCVE (VulDB): GCVE-100-127657
SecurityFocus: 106050 - QEMU CVE-2018-19665 Integer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 12/07/2018 09:23
Updated: 04/18/2020 18:00
Changes: 12/07/2018 09:23 (70), 04/18/2020 18:00 (6)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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