QEMU up to 3.0 hw/ppc/pnv_lpc.c pnv_lpc_do_eccb out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in QEMU up to 3.0. It has been declared as critical. Affected by this issue is the function pnv_lpc_do_eccb of the file hw/ppc/pnv_lpc.c. The manipulation results in out-of-bounds. This vulnerability is known as CVE-2018-18954. Attacking locally is a requirement. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in QEMU up to 3.0 (Virtualization Software). Affected is the function pnv_lpc_do_eccb of the file hw/ppc/pnv_lpc.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The pnv_lpc_do_eccb function in hw/ppc/pnv_lpc.c in Qemu before 3.1 allows out-of-bounds write or read access to PowerNV memory.

The bug was discovered 11/07/2018. The weakness was published 11/15/2018 (Website). The advisory is available at lists.gnu.org. This vulnerability is traded as CVE-2018-18954 since 11/05/2018. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 8 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 119216 (Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : qemu vulnerabilities (USN-3826-1)), 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 197310 (Ubuntu Security Notification for Qemu Vulnerabilities (USN-3826-1)).

Upgrading to version 3.1 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (119216) and SecurityFocus (BID 105920†). Similar entries are available at VDB-125149, VDB-125150, VDB-125348 and VDB-126413. 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: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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: 119216
Nessus Name: Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : qemu vulnerabilities (USN-3826-1)
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: 🔍

Upgrade: QEMU 3.1

Timelineinfo

11/05/2018 🔍
11/07/2018 +2 days 🔍
11/07/2018 +0 days 🔍
11/15/2018 +8 days 🔍
11/15/2018 +0 days 🔍
11/16/2018 +1 days 🔍
11/26/2018 +10 days 🔍
11/27/2018 +1 days 🔍
06/06/2023 +1652 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: USN-3826-1
Status: Confirmed

CVE: CVE-2018-18954 (🔍)
GCVE (CVE): GCVE-0-2018-18954
GCVE (VulDB): GCVE-100-126930
SecurityFocus: 105920 - QEMU 'hw/ppc/pnv_lpc.c' Out of Bounds Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 11/16/2018 08:08
Updated: 06/06/2023 16:24
Changes: 11/16/2018 08:08 (76), 04/13/2020 16:22 (4), 06/06/2023 16:24 (4)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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