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Date: Thu, 09 Feb 2017 14:50:59 +0100
From: Agostino Sarubbo <ago@...too.org>
To: oss-security@...ts.openwall.com
Subject: zziplib: assertion failure in seeko.c
Description:
zziplib is an intentionally lightweight library that offers the ability to
easily extract data from files archived in a single zip file.
A fuzz on it discovered an a NULL pointer access.
The complete ASan output:
# unzzipcat-seeko $FILE
/tmp/portage/dev-libs/zziplib-0.13.62-
r1/work/zziplib-0.13.62/zzip/fseeko.c:313: ZZIP_ENTRY
*zzip_entry_findfirst(FILE *): Assertion `0 <= root && root < mapsize' failed.
Affected version:
0.13.62
Fixed version:
N/A
Commit fix:
N/A
Credit:
This bug was discovered by Agostino Sarubbo of Gentoo.
CVE:
N/A
Reproducer:
https://github.com/asarubbo/poc/blob/master/00161-zziplib-assertionfailure-seeko_C
Timeline:
2017-01-17: bug discovered and poked upstream
2017-02-09: blog post about the issue
Note:
This bug was found with American Fuzzy Lop.
Permalink:
https://blogs.gentoo.org/ago/2017/02/09/zziplib-assertion-failure-in-seeko-c
--
Agostino Sarubbo
Gentoo Linux Developer
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