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Ubuntu Security Notice USN-5699-1
October 25, 2022
glibc vulnerabilities
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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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