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- **************************************************************************
- Security Bulletin 9220 DISA Defense Communications System
- July 28, 1992 Published by: DDN Security Coordination Center
- (SCC@NIC.DDN.MIL) 1-(800) 365-3642
-
- DEFENSE DATA NETWORK
- SECURITY BULLETIN
-
- The DDN SECURITY BULLETIN is distributed by the DDN SCC (Security
- Coordination Center) under DISA contract as a means of communicating
- information on network and host security exposures, fixes, and concerns
- to security and management personnel at DDN facilities. Back issues may
- be obtained via FTP (or Kermit) from NIC.DDN.MIL [192.112.36.5]
- using login="anonymous" and password="guest". The bulletin pathname is
- scc/ddn-security-yynn (where "yy" is the year the bulletin is issued
- and "nn" is a bulletin number, e.g. scc/ddn-security-9220).
-
- **************************************************************************
-
- CORRUPTED VERSIONS OF PKZIP UTILITIES
- July 27, 1992
-
-
- I. DESCRIPTION
-
- ASSIST has learned that two corrupt versions of the popular archiving
- utility PKZIP for PC-DOS and MS-DOS machines are being circulated on
- several bulletin board systems around the country. The two corrupted
- versions are 2.01 (PKZ201.ZIP AND PKZ201.EXE) AND 2.2 (PKZIPV2.ZIP AND
- PKZIPV2.EXE). If you have downloaded any of these files, do not
- attempt to use these utilities.
-
- At the current time, the released version of PKZIP is version 1.10.
- A new version of PKZIP is expected to be released within the next
- few months. Its version number may be 2.00, or it may be a version
- number greater than 2.2 to distinguish it from the corrupted versions.
- PKWARE INC. has indicated it will never issue a version 2.01 or 2.2
- of PKZIP.
-
- II. IMPACT
-
- THE DESTRUCTION OF ALL THE DATA ON YOUR HARD DISK IS A POSSIBILITY IF
- THE PROGRAMS ARE EXECUTED.
-
- III. SOLUTION
-
- According to PKWARE INC., version 2.01 is a hacked version of PKZIP 1.93
- alpha. While this version does not intentionally do any damage, it is
- alpha level software and may have serious bugs in it. Version 2.2 is
- a simple batch file that attempts to erase the C:(BACKSLASH) and
- C:(BACKSLASH)DOS directories. If the hard disk has been erased by this
- program, recovery may be possible by utilizing hard disk undelete
- utilities such as those in NORTON UTILITIES or PCTOOLS.
-
- Don't do anything that might create or expand a file on your hard disk
- until the files have been undeleted to avoid overwriting the deleted
- files, which will destroy them.
-
- To examine a file to determine if it is version 2.2, type it to the
- screen with the DOS `TYPE' command. If the file that prints on the
- screen is a short batch file with commands such as
-
- DEL C:(BACKSLASH)(ASTERISK).(ASTERISK), or
-
- DEL C:(BACKSLASH)(DOS)(BACKSLASH)(ASTERISK).(ASTERISK)
-
- then you have the corrupted file.
-
- Any freeware or shareware program downloaded from a BBS should be scanned
- and evaluated by a knowledgeable AIS person on a standalone PC before the
- program is introduced into any system. If you or anyone else at your site
- should happen to encounter any corrupted files on a BBS, Please contact
- the ASSIST immediately
-
- PKWARE Inc. has also requested that they be informed of any occurrences of
- corrupted PKZIP files. PKWARE Inc. can be reached at (414) 354-8699
- (voice), (414) 354-8670(BBS), (414) 354-8559(FAX).
-
- The ASSIST Point of Contact for this matter is Mr. Mike Higgins,
- COMM (202) 373-8852/55 or DSN 243-8852/55.
-
- ASSIST can be reached 24 hours a day via commercial pager at
- 1-(800) SKY-PAGE, PIN NUMBER 2133937 (FROM A TOUCH TONE PHONE ENTER
- THE CALL BACK NUMBER AFTER THE PROMPT) or AUTOVON dial 243-8000 and
- ask to have the ASSIST Duty Officer paged. ASSIST can also be reached
- via E-Mail at "DOD-CERT(AT-SIGN)DDN-CONUS.DDN.MIL."
-
- ****************************************************************************
- * *
- * The point of contact for MILNET security-related incidents is the *
- * Security Coordination Center (SCC). *
- * *
- * E-mail address: SCC@NIC.DDN.MIL *
- * *
- * Telephone: 1-(800)-365-3642 *
- * *
- * NIC Help Desk personnel are available from 7:00 a.m.-7:00 p.m. EST, *
- * Monday through Friday except on federal holidays. *
- * *
- ****************************************************************************
-