Alerts This Week
Warning Icon 1 758
Alerts This Week
Warning Icon 1 758

Ubuntu 23.10 & 22.04 LTS USN-6727-1 Critical: NSS Remote Attack

ubuntu
Calendar Grey April 10, 2024
Dist Ubuntu Esm H88
Several critical NSS flaws discovered in Ubuntu on April 10, 2024, necessitate prompt remediation to shield sensitive information from being compromised.
Several security issues were fixed in NSS.

Summary

Several security issues were fixed in NSS.

Software Description:

- nss: Network Security Service library

Details:

It was discovered that NSS incorrectly handled padding when checking PKCS#1

certificates. A remote attacker could possibly use this issue to perform

Bleichenbacher-like attacks and recover private data. This issue only

affected Ubuntu 20.04 LTS. (CVE-2023-4421)

It was discovered that NSS had a timing side-channel when performing RSA

decryption. A remote attacker could possibly use this issue to recover

private data. (CVE-2023-5388)

It was discovered that NSS had a timing side-channel when using certain

NIST curves. A remote attacker could possibly use this issue to recover

private data. (CVE-2023-6135)

The NSS package contained outdated CA certificates. This update refreshes

the NSS package to version 3.98 which includes the latest CA certificate

bundle and other security improvements.

Topics%20covered

Topics Covered

security advisory critical issue remote attack ubuntu nss

Update Instructions

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

Ubuntu 23.10:
   libnss3                         2:3.98-0ubuntu0.23.10.1

Ubuntu 22.04 LTS:
   libnss3                         2:3.98-0ubuntu0.22.04.1

Ubuntu 20.04 LTS:
   libnss3                         2:3.98-0ubuntu0.20.04.1

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References

https://ubuntu.com/security/notices/USN-6727-1

CVE-2023-4421, CVE-2023-5388, CVE-2023-6135

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6727-1

Topics%20covered

Topics Covered

security advisory critical issue remote attack ubuntu nss

Package Information

https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.23.10.1
https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.22.04.1
https://launchpad.net/ubuntu/+source/nss/2:3.98-0ubuntu0.20.04.1

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here