Lucene search

K
securityvulnsSecurityvulnsSECURITYVULNS:DOC:22693
HistoryOct 28, 2009 - 12:00 a.m.

Adobe Acrobat Reader up to 9.1.1 ONLY Linux integer overflow to heap overflow.

2009-10-2800:00:00
vulners.com
30

Vulnerability like in topic (connected with vulns in xpdf). More details available here:

======
Last few weeks I was talking(mailing) with Derek (xpdf developer –
btw. really nice guy) about some vulnerabilities in his product. 14th of
October he published path for bugs (not only my vulnerabilites) so i decide
to release advisory…

Oryginal advisory you can find here… I want to write about this
vulnerabilites on blog for several reasons:

1) This is interesting bug in draw image function

2) This vulnerability exists NOT only in xpdf application

3) Adobe Acrobat Reader is vulnerable to this attack too (but ONLY Linux
version !!!)

4) Adobe Acrobat Reader didn’t know about this bug but in his last
release fix this vulnerability.

First reason you can analyse in advisory but what about others? Vulnerable
is:

*) xpdf

*) libpoppler (so it implies vulnerability in for example evince software
– default pdf reader in Fedora Linux – I made PoC for this
software).

*) Adobe Acrobat Reader ONLY for Linux (versions up to 9.1.1 – 9.1.2
and 9.1.3 aren’t vuln)

*) Maybe others?

Ok let’s analyse Adobe Acrobat vuln in version 9.1.1:

gdb –pid=<smth>

(gdb) c
Continuing.

Missing separate debuginfo for
/opt/A911/Adobe/Reader9/Reader/intellinux/plug_ins/EFS.api

Program received signal SIGSEGV, Segmentation fault.
0Ч01499e6d in memmove () from /lib/libc.so.6
Missing separate debuginfos, use: debuginfo-install
GConf2-2.26.2-1.fc11.i586 ORBit2-2.14.17-1.fc11.i586
gamin-0.1.10-4.fc11.i586 gvfs-1.2.3-12.fc11.i586 libidn-1.9-4.i586
nss-mdns-0.10-7.fc11.i586(gdb) bt
#0 0Ч01499e6d in memmove () from /lib/libc.so.6
#1 0Ч08a95bdf in ?? ()
#2 0Ч28371a0a in ?? ()
#3 0Ч0d2e66aa in ?? ()
#4 0Ч8e15b1fe in ?? ()
#5 0Ч8e15b1fe in ?? ()
#6 0xbffb5f7c in ?? ()
#7 0Ч089e2189 in ?? ()

Backtrace stopped: previous frame identical to this frame (corrupt stack?)

(gdb) x/i $eip
0Ч1499e6d <memmove+77>: rep movsl %ds:(%esi),%es:(%edi)
(gdb) i r esi edi ds es ecx
esi 0Ч27b72ffe 666316798
edi 0Ч42bfe35e 1119871838
ds 0Ч7b 123
es 0Ч7b 123
ecx 0Ч6a23256 111293014
(gdb)

So we have hard evidence that this is probably integer overflow vuln which
causes heap overflow vulnerability :)

PoC for Adobe Acrobat Reader in versions =< 9.1.1 – private…
yet :)

(Taken from my blog: http://blog.pi3.com.pl/?p=19&#41;

Best regards,
Adam Zabrocki