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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