NeXTstep "npd" program could allow an attacker to gain root privileges

nextstep-npd-root-access (7143) The risk level is classified as HighHigh Risk


NeXTstep could allow a remote attacker to gain elevated system privileges, caused by a vulnerability in the '/usr/lib/NextPrinter/npd' program. On systems that have publicly accessible printers and weak directory permissions, a remote attacker could use this vulnerability to gain root privileges.


Gain Privileges


Upgrade to a more secure version of 'lpd' and change the permissions of directories on the system that are currently owned and able to be written by group "wheel", as listed in CERT Advisory CA-1990-06. See References.


  • CERT Advisory CA-1990-06: NeXT's System Software.
  • CIAC Information Bulletin B-01: Security Problem on the NeXT Operating System.
  • BID-10: NeXTstep npd Vulnerability
  • BID-1000: Microsoft Windows Media Services Handshake Sequence DoS Vulnerability
  • BID-10002: cPanel Multiple Module Cross-Site Scripting Vulnerabilities
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  • BID-10020: CactuSoft CactuShop Cross-Site Scripting Vulnerability
  • BID-10022: Roger Wilco Server UDP Datagram Handling Denial Of Service Vulnerability
  • BID-10024: Roger Wilco Information Disclosure Vulnerability
  • BID-10025: Roger Wilco Server Unauthorized Audio Stream Denial Of Service Vulnerability
  • BID-10026: ADA IMGSVR Remote Directory Listing Vulnerability
  • BID-10027: ADA IMGSVR Remote File Download Vulnerability
  • BID-10028: OpenBSD ISAKMPD Zero Payload Length Denial Of Service Vulnerability
  • BID-1003: FTPx FTP Explorer Weak Password Encryption Vulnerability
  • BID-10033: HAHTsite Scenario Server Project File Name Buffer Overrun Vulnerability
  • BID-10036: Macromedia Dreamweaver Remote User Database Access Vulnerability
  • BID-10037: SGI IRIX ftpd Multiple Denial Of Service Vulnerabilities
  • CVE-1999-1391: Vulnerability in NeXT 1.0a and 1.0 with publicly accessible printers allows local users to gain privileges via a combination of the npd program and weak directory permissions.
  • OSVDB ID: 8768: NeXTstep npd Local Privilege Escalation

Platforms Affected:

  • NeXT NeXTstep 1.0 and 1.0a


Oct 03, 1990

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