CVE-2018-18954 : The pnv_lpc_do_eccb function in hw/ppc/pnv

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.

Published 2018-11-15 20:29:00

Updated 2019-05-31 14:29:02

Source MITRE

View at NVD, CVE.org

Vulnerability category: Memory Corruption

Products affected by CVE-2018-18954

Canonical » Ubuntu Linux » Version: 18.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 18.10
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
Matching versions
Qemu » Qemu
Versions before (<) 3.1
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
Matching versions
Opensuse » Leap » Version: 42.3
cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.06%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 25 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
2.1	LOW	AV:L/AC:L/Au:N/C:N/I:N/A:P	3.9	2.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
5.5	MEDIUM	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	1.8	3.6	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE-125 Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)
CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

https://www.debian.org/security/2019/dsa-4454

Debian -- Security Information -- DSA-4454-1 qemu

CVEs referencing this url
https://seclists.org/bugtraq/2019/May/76

Bugtraq: [SECURITY] [DSA 4454-1] qemu security update

CVEs referencing this url
http://www.securityfocus.com/bid/105920

QEMU 'hw/ppc/pnv_lpc.c' Out of Bounds Denial of Service Vulnerability
Third Party Advisory;VDB Entry
https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg00446.html

Re: [Qemu-devel] [PATCH v2] ppc/pnv: check size before data buffer acces
Mailing List;Patch;Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html

[security-announce] openSUSE-SU-2019:1074-1: important: Security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://usn.ubuntu.com/3826-1/

USN-3826-1: QEMU vulnerabilities | Ubuntu security notices
Third Party Advisory

CVEs referencing this url
http://www.openwall.com/lists/oss-security/2018/11/06/6

oss-security - CVE-2018-18954 QEMU: ppc64: Out-of-bounds r/w stack access in pnv_lpc_do_eccb
Mailing List;Patch;Third Party Advisory

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