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Ubuntu: 4760-1 Critical: Libzstd Information Exposure Risk

ubuntu
Calendar Grey March 8, 2021
Dist Ubuntu Esm H88
The Ubuntu security notice USN-4760-1 draws attention to vulnerabilities in libzstd that may lead to the exposure of confidential information across various versions.
libzstd could be made to expose sensitive information.

Summary

libzstd could be made to expose sensitive information.

Software Description:

- libzstd: fast lossless compression algorithm

Details:

It was discovered that libzstd incorrectly handled file permissions. A

local attacker could possibly use this issue to access certain files,

contrary to expectations.

Topics%20covered

Topics Covered

security advisory security update critical information exposure ubuntu file permissions libzstd

Update Instructions

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

Ubuntu 20.10:
  libzstd1                        1.4.5+dfsg-4ubuntu0.1
  zstd                            1.4.5+dfsg-4ubuntu0.1

Ubuntu 20.04 LTS:
  libzstd1                        1.4.4+dfsg-3ubuntu0.1
  zstd                            1.4.4+dfsg-3ubuntu0.1

Ubuntu 18.04 LTS:
  libzstd1                        1.3.3+dfsg-2ubuntu1.2
  zstd                            1.3.3+dfsg-2ubuntu1.2

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-4760-1

CVE-2021-24031, CVE-2021-24032

Severity
critical
Lowest
Low
Medium
High
Critical

March 08, 2021

Topics%20covered

Topics Covered

security advisory security update critical information exposure ubuntu file permissions libzstd

Package Information

https://launchpad.net/ubuntu/+source/libzstd/1.4.5+dfsg-4ubuntu0.1
https://launchpad.net/ubuntu/+source/libzstd/1.4.4+dfsg-3ubuntu0.1
https://launchpad.net/ubuntu/+source/libzstd/1.3.3+dfsg-2ubuntu1.2

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