New subject: [Bug 1036969] VUL-1: CVE-2017-8372: libmad: assertion failure in layer3.c

30 Apr 2017


      http://bugzilla.opensuse.org/show_bug.cgi?id=1036969
Bug ID: 1036969
           Summary: VUL-1: libmad: assertion failure in layer3.c
    Classification: openSUSE
           Product: openSUSE Distribution
           Version: Leap 42.2
          Hardware: Other
                OS: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Security
          Assignee: security-team@suse.de
          Reporter: mikhail.kasimov@gmail.com
        QA Contact: qa-bugs@suse.de
          Found By: ---
           Blocker: ---
Created attachment 723246
  --> http://bugzilla.opensuse.org/attachment.cgi?id=723246&action=edit
00213-libmad-heapoverflow-mad_layer_III_reproducer
Ref:
https://blogs.gentoo.org/ago/2017/04/30/libmad-assertion-failure-in-layer3-c...
================================================
Description:
libmad stays for “M”peg “A”udio “D”ecoder library.
The same testcase provided in the article: libmad: heap-based buffer overflow
in mad_layer_III (layer3.c) is able to show an assertion failure if libmad was
compiled with debug (–enable-debugging).
The complete output of the failure:
# madplay -v -i -o raw:out $FILE
madplay:
/tmp/portage/media-libs/libmad-0.15.1b-r8/work/libmad-0.15.1b/layer3.c:2633:
mad_layer_III: Assertion `stream->md_len + md_len - si.main_data_begin <=
MAD_BUFFER_MDLEN' failed.
Affected version:
0.15.1b
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/00213-libmad-heapoverflow-mad_la...
Timeline:
2017-01-01: bug discovered and reported to upstream
2017-04-30: blog post about the issue
Note:
This bug was found with American Fuzzy Lop.
================================================
(open-)SUSE: https://software.opensuse.org/package/libmad
0.15.1b (TW, 42.{1,2}, multimedia:libs repo)
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[Bug 1036969] New: VUL-1: libmad: assertion failure in layer3.c