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Ubuntu Security Notice USN-5310-2

Ubuntu Security Notice USN-5310-2
Posted Mar 7, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5310-2 - USN-5310-1 fixed several vulnerabilities in GNU. This update provides the corresponding update for Ubuntu 16.04 ESM. It was discovered that the GNU C library getcwd function incorrectly handled buffers. An attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2021-3999, CVE-2022-23219
SHA-256 | 13edb425e5376cd1e6f7b1f1a7b3b981295f9b7415ac52782a50d019971b7e29

Ubuntu Security Notice USN-5310-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5310-2
March 07, 2022

glibc vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 ESM

Summary:

Several security issues were fixed in GNU C Library.

Software Description:
- glibc: GNU C Library

Details:

USN-5310-1 fixed several vulnerabilities in GNU. This update provides
the corresponding update for Ubuntu 16.04 ESM.

Original advisory details:

It was discovered that the GNU C library getcwd function incorrectly
handled buffers. An attacker could use this issue to cause the GNU C
Library to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2021-3999)

It was discovered that the GNU C Library sunrpc module incorrectly handled
buffer lengths. An attacker could possibly use this issue to cause the GNU
C Library to crash, resulting in a denial of service. (CVE-2022-23218,
CVE-2022-23219)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 ESM:
libc6 2.23-0ubuntu11.3+esm1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5310-2
https://ubuntu.com/security/notices/USN-5310-1
CVE-2021-3999, CVE-2022-23218, CVE-2022-23219
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