Bug 1471816 (CVE-2017-11343) - CVE-2017-11343 chicken: Predictable symbol table due to using default libc seed in PRNG
Summary: CVE-2017-11343 chicken: Predictable symbol table due to using default libc se...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2017-11343
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
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Depends On: 1471817 1471818
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-07-17 13:41 UTC by Pedro Sampaio
Modified: 2019-09-29 14:16 UTC (History)
1 user (show)

Fixed In Version:
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Last Closed: 2019-06-08 03:16:44 UTC

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Description Pedro Sampaio 2017-07-17 13:41:08 UTC 
A flaw was found in CHICKEN Scheme symbol table randomization algorithm. The code that sets up the initial symbol table is run _before_ initializing the PRNG, which means the randomization factor uses the initial libc seed state.  On most libc implementations this means the symbol table randomization factor is a constant value which does not differ between runs.

Upstream patch:

http://lists.gnu.org/archive/html/chicken-hackers/2017-06/txtod8Pa1wGU0.txt

References:

http://seclists.org/oss-sec/2017/q3/174
http://lists.nongnu.org/archive/html/chicken-announce/2017-07/msg00000.html
Comment 1 Pedro Sampaio 2017-07-17 13:41:30 UTC 
Created chicken tracking bugs for this issue:

Affects: epel-all [bug 1471818]
Affects: fedora-all [bug 1471817]
Comment 2 Product Security DevOps Team 2019-06-08 03:16:44 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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