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Ubuntu 14.04 LTS: 6762-1 Critical eglibc Denial of Service Attack

ubuntu
Calendar Grey May 2, 2024
Dist Ubuntu Esm H88
Recent security bulletins for GNULibC have highlighted severe vulnerabilities that necessitate prompt updates to ensure defenses against potential exploits.
Several security issues were fixed in GNU C Library.

Summary

Several security issues were fixed in GNU C Library.

Software Description:

- glibc: GNU C Library

- eglibc: GNU C Library

Details:

It was discovered that GNU C Library incorrectly handled netgroup requests.

An attacker could possibly use this issue to cause a crash or execute arbitrary code.

This issue only affected Ubuntu 14.04 LTS. (CVE-2014-9984)

It was discovered that GNU C Library might allow context-dependent

attackers to cause a denial of service. This issue only affected Ubuntu 14.04 LTS.

(CVE-2015-20109)

It was discovered that GNU C Library when processing very long pathname arguments to

the realpath function, could encounter an integer overflow on 32-bit

architectures, leading to a stack-based buffer overflow and, potentially,

arbitrary code execution. This issue only affected Ubuntu 14.04 LTS.

(CVE-2018-11236)

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, r...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service security update code execution Ubuntu glibc GNU C Library

Update Instructions

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

Ubuntu 18.04 LTS
  libc6                           2.27-3ubuntu1.6+esm2
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libc6                           2.23-0ubuntu11.3+esm6
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  libc6                           2.19-0ubuntu6.15+esm3
                                  Available with Ubuntu Pro

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

References

https://ubuntu.com/security/notices/USN-6762-1

CVE-2014-9984, CVE-2015-20109, CVE-2018-11236, CVE-2021-3999,

CVE-2024-2961, https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/2063328

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6762-1

Topics%20covered

Topics Covered

security advisory denial of service security update code execution Ubuntu glibc GNU C Library

Package Information

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