SQL-Ledger and LedgerSMB am.pl directory traversal

sqlledger-ledgersmb-am-directory-traversal (33306) The risk level is classified as MediumMedium Risk

Description:

SQL-Ledger and LedgerSMB could allow a remote attacker to traverse directories on the system. An attacker could send a specially-crafted URL request to the am.pl script containing "dot dot" sequences (/../) in the login parameter and appended with NULL (%00) characters to bypass authentication and run executables on the system.

Platforms Affected:

  • DWS Systems, SQL-Ledger 2.6.27 and prior
  • LedgerSMB, LedgerSMB prior to 1.1.10

Remedy:

For LedgerSMB:
Upgrade to the latest version of LedgerSMB (1.1.10 or later), available from the SQL-Ledger Web site. See References.

Consequences:

Bypass Security

References:

  • BugTraq Mailing List, Sat Mar 17 2007 - 23:45:25 CDT, Full Disclosure: Arbitrary execution vulnerability in SQL-Ledger and LedgerSM at http://archives.neohapsis.com/archives/bugtraq/2007-03/0244.html.
  • SourceForge.net, LedgerSMB at http://sourceforge.net/projects/ledger-smb/.
  • SQL-Ledger Web site, SQL-Ledger Accounting at http://www.sql-ledger.org/.
  • BID-22769: SQL-Ledger/LedgerSMB Template Editing File Parameter Directory Traversal Vulnerability
  • BID-23034: LedgerSMB/SQL-Ledger Login Parameter Local File Include And Authentication Bypass Vulnerabilities
  • CVE-2007-1540: Directory traversal vulnerability in am.pl in (1) SQL-Ledger 2.6.27 and earlier, and (2) LedgerSMB before 1.2.0, allows remote attackers to run arbitrary executables and bypass authentication via a .. (dot dot) sequence and trailing NULL (%00) in the login parameter. NOTE: this issue was reportedly addressed in SQL-Ledger 2.6.27, however third-party researchers claim that the file is still executed even though an error is generated.
  • FrSIRT/ADV-2007-1024: LedgerSMB Form Login Remote Directory Traversal and Code Execution Vulnerability
  • FrSIRT/ADV-2007-1025: SQL-Ledger Login Form Remote Directory Traversal and Code Execution Vulnerability
  • OSVDB ID: 33624: LedgerSMB am.pl Traversal Arbitrary File Execution
  • SA24560: SQL-Ledger Unspecified Code Execution Vulnerability
  • SA24585: LedgerSMB Unspecified Code Execution Vulnerability

Reported:

Mar 17, 2007

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