full-disclosure - SumatraPDF <= 0.9.3 Heap Overflow PoC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <49F22E91.80607@c.cc>
Date: Fri, 24 Apr 2009 23:26:41 +0200
From: c <c@...c>
To: full-disclosure@...ts.grok.org.uk
Subject: SumatraPDF <= 0.9.3 Heap Overflow PoC

The overflow occurs at the following location:

mupdf/mupdf/pdf_function.c:1167

    obj = fz_dictgets(dict, "C0");
    if (fz_isarray(obj))
    {
        func->n = fz_arraylen(obj);
        for (i = 0; i < func->n; ++i)
            func->u.e.c0[i] = fz_toreal(fz_arrayget(obj, i));
    }

func->n is used without being checked first. There are a few integer
overflows elsewhere in the code as well.

Download attachment "a.pdf" of type "application/pdf" (11690 bytes)

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/