CVE-2020-28974

A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.

CVSS v3.0 5.0 MEDIUM
CVSS v2.0 6.1 MEDIUM

5.0^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 0.3 / Impact : 4.7

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

6.1^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:C

Exploitability : 3.9 / Impact : 8.5

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact COMPLETE

References

Link	Resource
https://seclists.org/oss-sec/2020/q4/104	Exploit Mailing List Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7	Release Notes Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804	Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2020/11/25/1	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html	Third Party Advisory
https://security.netapp.com/advisory/ntap-20210108-0003/	Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Information

Published : 2020-11-20 10:15

Updated : 2021-01-27 11:44

NVD link : CVE-2020-28974

Mitre link : CVE-2020-28974

JSON object : View

CWE

CWE-125

Out-of-bounds Read

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Products Affected

debian

debian_linux

linux

linux_kernel

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