[USN-6804-1] GNU C Library vulnerabilities

[Paulo Flabiano Smorigo]

==========================================================================
Ubuntu Security Notice USN-6804-1
May 31, 2024

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

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

- Ubuntu 24.04 LTS
- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in GNU C Library.

Software Description:
- glibc: GNU C Library

Details:

It was discovered that GNU C Library nscd daemon contained a stack-based buffer
overflow. A local attacker could use this to cause a denial of service
(system crash). (CVE-2024-33599)

It was discovered that GNU C Library nscd daemon did not properly check the
cache content, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2024-33600)

It was discovered that GNU C Library nscd daemon did not properly validate
memory allocation in certain situations, leading to a null pointer dereference
vulnerability. A local attacker could use this to cause a denial of service
(system crash). (CVE-2024-33601)

It was discovered that GNU C Library nscd daemon did not properly handle memory
allocation, which could lead to memory corruption. A local attacker could use
this to cause a denial of service (system crash). (CVE-2024-33602)

Update instructions:

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

Ubuntu 24.04 LTS
  nscd                            2.39-0ubuntu8.2

Ubuntu 23.10
  nscd                            2.38-1ubuntu6.3

Ubuntu 22.04 LTS
  nscd                            2.35-0ubuntu3.8

Ubuntu 20.04 LTS
  nscd                            2.31-0ubuntu9.16

Ubuntu 18.04 LTS
  nscd                            2.27-3ubuntu1.6+esm3
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  nscd                            2.23-0ubuntu11.3+esm7
                                  Available with Ubuntu Pro

After a standard system update you need to restart nscd to make
all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-6804-1
  CVE-2024-33599, CVE-2024-33600, CVE-2024-33601, CVE-2024-33602

Package Information:
  https://launchpad.net/ubuntu/+source/glibc/2.39-0ubuntu8.2
  https://launchpad.net/ubuntu/+source/glibc/2.38-1ubuntu6.3
  https://launchpad.net/ubuntu/+source/glibc/2.35-0ubuntu3.8
  https://launchpad.net/ubuntu/+source/glibc/2.31-0ubuntu9.16
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