Ubuntu Security Notice USN-5768-1
December 08, 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:
Jan Engelhardt, Tavis Ormandy, and others discovered that the GNU C Library
iconv feature incorrectly handled certain input sequences. An attacker
could possibly use this issue to cause the GNU C Library to hang or crash,
resulting in a denial of service. (CVE-2016-10228, CVE-2019-25013,
CVE-2020-27618)
It was discovered that the GNU C Library did not properly handled DNS
responses when ENDS0 is enabled. An attacker could possibly use this issue
to cause fragmentation-based attacks. (CVE-2017-12132)
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+esm3
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5768-1
CVE-2016-10228, CVE-2017-12132, CVE-2019-25013, CVE-2020-27618
