USN-5379-1: klibc vulnerabilities
18 April 2022
Several security issues were fixed in klibc.
Releases
Packages
- klibc - small utilities built with klibc for early boot
Details
It was discovered that klibc did not properly perform
some mathematical operations, leading to an integer overflow.
An attacker could possibly use this issue to cause a crash,
resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2021-31870)
It was discovered that klibc did not properly handled some
memory allocations on 64 bit systems. An attacker could
possibly use this issue to cause a crash, resulting in a
denial of service, or possibly execute arbitrary code.
(CVE-2021-31871)
It was discovered that klibc did not properly handled some file
sizes values on 32 bit systems. An attacker could possibly use
this issue to cause a crash, resulting in a denial of service,
or possibly execute arbitrary code. (CVE-2021-31872)
It was discovered that klibc did not properly handled some
memory allocations. An attacker could possibly use this issue
to cause a crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2021-31873)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04
-
klibc-utils
-
2.0.4-8ubuntu1.16.04.4+esm1
Available with Ubuntu Pro
-
libklibc
-
2.0.4-8ubuntu1.16.04.4+esm1
Available with Ubuntu Pro
Ubuntu 14.04
-
klibc-utils
-
2.0.3-0ubuntu1.14.04.3+esm2
Available with Ubuntu Pro
-
libklibc
-
2.0.3-0ubuntu1.14.04.3+esm2
Available with Ubuntu Pro
After a standard system update you need to reboot your computer to make
all the necessary changes.