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Ubuntu: 6407-2 Moderate: libx11 Denial Of Service and Risks

ubuntu
Calendar Grey October 10, 2023
Dist Ubuntu Esm H88
Explore the latest Ubuntu Security Notice USN-6407-3, which tackles vulnerabilities in libx11 impacting various versions.
Several security issues were fixed in libx11.

Summary

Several security issues were fixed in libx11.

Software Description:

- libx11: X11 client-side library

Details:

USN-6407-1 fixed several vulnerabilities in libx11. This update provides

the corresponding update for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

Gregory James Duck discovered that libx11 incorrectly handled certain

keyboard symbols. If a user were tricked into connecting to a malicious X

server, a remote attacker could use this issue to cause libx11 to crash,

resulting in a denial of service, or possibly execute arbitrary code.

(CVE-2023-43785)

Yair Mizrahi discovered that libx11 incorrectly handled certain malformed

XPM image files. If a user were tricked into opening a specially crafted

XPM image file, a remote attacker could possibly use this issue to consume

memory, leading to a denial of service. (CVE-2023-43786)

Yair Mizrahi discovered that libx11 incorrectly handled certain malformed

XPM image files. If a us...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory moderate denial of service remote code execution ubuntu libx11

Update Instructions

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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  libx11-6                        2:1.6.4-3ubuntu0.4+esm2

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  libx11-6                        2:1.6.3-1ubuntu2.2+esm4

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
  libx11-6                        2:1.6.2-1ubuntu2.1+esm5

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

References

https://ubuntu.com/security/notices/USN-6407-2

https://ubuntu.com/security/notices/USN-6407-1

CVE-2023-43785, CVE-2023-43786, CVE-2023-43787

Ubuntu Security Notice USN-6407-2

Topics%20covered

Topics Covered

security advisory moderate denial of service remote code execution ubuntu libx11

Package Information

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