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Ubuntu 12.04 ESM USN-3372-1 Moderate: NSS Denial Of Service Threat

ubuntu
Calendar Grey July 31, 2017
Dist Ubuntu Esm H88
=========================================================================Ubuntu Security Notice USN-
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 certain empty SSLv2

messages. A remote attacker could possibly use this issue to cause NSS

to crash, resulting in a denial of service. (CVE-2017-7502)

Karthik Bhargavan and Gaetan Leurent discovered that the DES and Triple

DES ciphers were vulnerable to birthday attacks. A remote attacker

could possibly use this flaw to obtain clear text data from long

encrypted sessions. This update causes NSS to limit use of the same

symmetric key. (CVE-2016-2183)

It was discovered that NSS incorrectly handled Base64 decoding. A

remote attacker could use this flaw to cause NSS to crash, resulting in

a denial of service, or possibly execute arbitrary code. (CVE-2017-5461)

Topics%20covered

Topics Covered

security advisory moderate denial of service cryptography nss

Update Instructions

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

Ubuntu 12.04 ESM:
  libnss3                         2:3.28.4-0ubuntu0.12.04.1

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any
applications that use NSS, such as Evolution and Chromium, to make all
the necessary changes.

References

 

  CVE-2016-2183, CVE-2017-5461, CVE-2017-7502

Severity
important
Lowest
Low
Medium
High
Critical

July 31, 2017

Topics%20covered

Topics Covered

security advisory moderate denial of service cryptography nss

Package Information

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