USN-5310-2: GNU C Library vulnerabilities
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Ubuntu Security Notice USN-5310-2
March 07, 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:
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
A GNU C Library security update has been released for Ubuntu Linux 16.04 ESM.
