Bug 1471816 - (CVE-2017-11343) CVE-2017-11343 chicken: Predictable symbol table due to using default libc seed in PRNG
CVE-2017-11343 chicken: Predictable symbol table due to using default libc se...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20170717,reported=2...
: Security
Depends On: 1471817 1471818
Blocks:
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Reported: 2017-07-17 09:41 EDT by Pedro Sampaio
Modified: 2017-07-17 09:41 EDT (History)
1 user (show)

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Description Pedro Sampaio 2017-07-17 09:41:08 EDT
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 09:41:30 EDT
Created chicken tracking bugs for this issue:

Affects: epel-all [bug 1471818]
Affects: fedora-all [bug 1471817]

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