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Ubuntu Security Notice USN-5699-1

Ubuntu Security Notice USN-5699-1
Posted Oct 26, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5699-1 - 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. It was discovered that the GNU C Library nscd daemon incorrectly handled certain netgroup lookups. An attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of service.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2021-3326, CVE-2021-35942
SHA-256 | 147855b038f48991c374fe1a00958b8946511505d650a498f3ae7dbf1c51de72

Ubuntu Security Notice USN-5699-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5699-1
October 25, 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-2021-3326)

It was discovered that the GNU C Library nscd daemon incorrectly handled
certain netgroup lookups. An attacker could possibly use this issue to
cause the GNU C Library to crash, resulting in a denial of service.
(CVE-2021-35942)

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+esm2

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

References:
https://ubuntu.com/security/notices/USN-5699-1
CVE-2021-3326, CVE-2021-35942
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