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Ubuntu.comUB:CVE-2020-10781
HistoryJun 18, 2020 - 12:00 a.m.

CVE-2020-10781

2020-06-1800:00:00
ubuntu.com
ubuntu.com
44

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

4.9 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.0004 Low

EPSS

Percentile

5.4%

A flaw was found in the Linux Kernel before 5.8-rc6 in the ZRAM kernel
module, where a user with a local account and the ability to read the
/sys/class/zram-control/hot_add file can create ZRAM device nodes in the
/dev/ directory. This read allocates kernel memory and is not accounted for
a user that triggers the creation of that ZRAM device. With this
vulnerability, continually reading the device may consume a large amount of
system memory and cause the Out-of-Memory (OOM) killer to activate and
terminate random userspace processes, possibly making the system
inoperable.

Bugs

Notes

Author Note
sbeattie zram module is not loaded by default, but is enabled.
How to protect your server from attacks?

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

4.9 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.0004 Low

EPSS

Percentile

5.4%

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