Bug 894659 - (CVE-2013-0178) CVE-2013-0178 redis 2.4: Insecure temporary flaw use for redis service's vm swap file
CVE-2013-0178 redis 2.4: Insecure temporary flaw use for redis service's vm s...
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
Unspecified Unspecified
low Severity low
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Assigned To: Red Hat Product Security
: Security
Depends On: 895120 895121
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Reported: 2013-01-12 17:55 EST by Michael Scherer
Modified: 2015-08-22 02:56 EDT (History)
4 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2015-08-22 02:56:21 EDT
Type: Bug
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RHEL 7.3 requirements from Atomic Host:
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Description Michael Scherer 2013-01-12 17:55:31 EST
It seems that redis 2.4 use a predictible file name in /tmp/ as some kind of swap file :

    server.vm_swap_file = zstrdup("/tmp/redis-%p.vm");

this was removed in 2.6 ( deprecated code ), but 2.4 is in fedora 18 and epel 6 AFAIK.

Since redis do not care if the file exist or not before opening it ( and in fact, I think it try to reuse if it already exist ), this could be used by a attacker to erase a arbitrary file with a symlink to the file. Depending if redis is running as root or not, this could be dangerous, or just a minor nuisance.
Comment 1 Jan Lieskovsky 2013-01-14 09:43:55 EST
Thank you for this report, Michael. I am going to steal this bug to be a security response product (as there are more products affected by this issue than just upcoming Fedora-18).
Comment 2 Jan Lieskovsky 2013-01-14 09:50:58 EST
This issue affects the versions of the redis package, as shipped with Fedora release of 16 and 17.


This issue affects the versions of the redis package, as shipped with Fedora EPEL 5 and Fedora EPEL 6.
Comment 3 Jan Lieskovsky 2013-01-14 10:46:32 EST
The upstream patch which fixed the "/tmp/redis-%p.vm" insecure flaw (but also introduced different one in "/tmp/redis.ds") is the following one:

So to fix this issue it would be easier to rebase to latest 2.6.* version, which doesn't contain the issue any more.
Comment 4 Jan Lieskovsky 2013-01-14 10:48:23 EST
Michael, since there is an upstream patch for this issue available already (latest 2.6.* version is not affected by this problem), would you mind if we would open this bug and request CVE identifier for it publicly?

Let us know. Thank you, Jan.
Jan iankko Lieskovsky / Red Hat Security Response Team
Comment 5 Michael Scherer 2013-01-14 10:53:23 EST
No problem for me.
Comment 6 Jan Lieskovsky 2013-01-14 10:54:59 EST
(In reply to comment #5)
> No problem for me.

Thank you. Will request CVE id shortly.
Comment 7 Jan Lieskovsky 2013-01-14 10:58:39 EST
Created redis tracking bugs for this issue

Affects: fedora-all [bug 895120]
Affects: epel-all [bug 895121]
Comment 8 Jan Lieskovsky 2013-01-14 11:11:42 EST
CVE request:
[1] http://www.openwall.com/lists/oss-security/2013/01/14/3
Comment 9 Vincent Danen 2013-01-15 11:51:05 EST
Two CVEs were assigned here:


CVE-2013-0178 for the insecure /tmp usage in 2.4
CVE-2013-0180 for the insecure /tmp usage in 2.6

Since we only ship 2.4-based versions, only noting the first CVE as applicable to us in this bug.

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