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Category:   Application (Security)  >   Network Security Services (NSS) Vendors:   Mozilla.org
(Oracle Issues Fix for Oracle Linux) Network Security Services SSLv2 ClientHello Processing May Let Remote Users Obtain Potentially Sensitive Information on the Target System
SecurityTracker Alert ID:  1041726
SecurityTracker URL:  http://securitytracker.com/id/1041726
CVE Reference:   CVE-2018-12384   (Links to External Site)
Date:  Sep 26 2018
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Network Security Services (NSS). A remote user can obtain potentially sensitive information on the target system.

On systems that compile the NSS library with a server application, a remote user can use an SSLv2-compatible ClientHello message to conduct a passive relay attack against stream ciphers that reply with a ServerHello message using all-zero random data.

The Mozilla project reported this vulnerability.

Impact:   A remote user can obtain potentially sensitive information on the target system.
Solution:   Oracle has issued a fix.

The Oracle Linux advisory is available at:

http://linux.oracle.com/errata/ELSA-2018-2768.html

Vendor URL:  linux.oracle.com/errata/ELSA-2018-2768.html (Links to External Site)
Cause:   Randomization error
Underlying OS:  Linux (Oracle)
Underlying OS Comments:  7

Message History:   This archive entry is a follow-up to the message listed below.
Sep 25 2018 Network Security Services SSLv2 ClientHello Processing May Let Remote Users Obtain Potentially Sensitive Information on the Target System



 Source Message Contents

Subject:  [El-errata] ELSA-2018-2768 Moderate: Oracle Linux 7 nss security update

Oracle Linux Security Advisory ELSA-2018-2768

http://linux.oracle.com/errata/ELSA-2018-2768.html

The following updated rpms for Oracle Linux 7 have been uploaded to the 
Unbreakable Linux Network:

x86_64:
nss-3.36.0-7.el7_5.i686.rpm
nss-3.36.0-7.el7_5.x86_64.rpm
nss-devel-3.36.0-7.el7_5.i686.rpm
nss-devel-3.36.0-7.el7_5.x86_64.rpm
nss-pkcs11-devel-3.36.0-7.el7_5.i686.rpm
nss-pkcs11-devel-3.36.0-7.el7_5.x86_64.rpm
nss-sysinit-3.36.0-7.el7_5.x86_64.rpm
nss-tools-3.36.0-7.el7_5.x86_64.rpm


SRPMS:
http://oss.oracle.com/ol7/SRPMS-updates/nss-3.36.0-7.el7_5.src.rpm



Description of changes:

[3.36.0-7]
- Backport upstream fix for CVE-2018-12384
- Remove nss-lockcert-api-change.patch, which turned out to be a
   mistake (the symbol was not exported from libnss)

[3.36.0-6]
- Exercise SSL tests which only run under non-FIPS setting


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