Bug 1329516 - nss: Failing to use /dev/urandom as source of randomness in container environment
Summary: nss: Failing to use /dev/urandom as source of randomness in container environ...
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1329518
Blocks: 1329519
TreeView+ depends on / blocked
 
Reported: 2016-04-22 07:10 UTC by Adam Mariš
Modified: 2019-09-29 13:47 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-05-25 10:20:00 UTC

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Description Adam Mariš 2016-04-22 07:10:29 UTC 
When running in container environment NSS may silently fail to use /dev/urandom as source of randomness and use substandard seeding methods, that can lead to improperly seeded random number generators.

Upstream bug:

https://bugzilla.mozilla.org/show_bug.cgi?id=1254334#c15
Comment 1 Adam Mariš 2016-04-22 07:10:55 UTC 
Created nss tracking bugs for this issue:

Affects: fedora-all [bug 1329518]
Comment 2 Bob Relyea 2016-04-23 01:22:35 UTC 
I should point out that the upstream bug continues to use NSS semantics. NSS doesn't sielently fail, NSS falls back and seeds the random number generater with additional entropy. NSS does not run without entropy.

The upstream bug was not that the additional entropy was flawed. It was that the way the entropy was generated used a deprecated function in fedora. This bug should either be closed are renamed. (the upstream bug is now closed).
Comment 3 Trevor Jay 2016-05-25 09:55:45 UTC 
On Current RHEL and Fed docker, /dev/urandom is made available by default exactly as present on the host system so this is not an issue for containers there as it is for other distros.
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