LedgerSMB 1.0.0 and SQL-Ledger 2.6.18 and earler arbitrary code execution

2006.09.18
Credit: Chris Travers
Risk: High
Local: No
Remote: Yes
CWE: N/A


CVSS Base Score: 5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

Hi all; Summary: A directory transversal issue was found in LedgerSMB 1.0.0 involving the terminal variable. This vulnerability was inherited from the SQL-Ledger codebase. Due to the fact that SQL-Ledger has a built-in text editor, this issue could result in arbitrary code execution on the server. The SQL-Ledger and LedgerSMB teams have both released patches to these vulnerabilities. Software affected: SQL-Ledger, all versions prior to 2.6.19. LedgerSMB 1.0.0 Other SQL-Ledger derivatives should presume themselves vulnerable (we have not checked). Patched versions: SQL-Ledger 2.6.19 LedgerSMB 1.0.0p1 SQL-Ledger 2.4.4-2.4.17 are particularly vulnerable due to CVE-2006-4244. Mitigating factors: Authentication is required (only for LedgerSMB 1.0.0 and SQL-Ledger 2.4.3 and lower, or 2.6.18). Detailed description: The "terminal" query variable is insufficiently checked in the login.pl and admin.pl files for validity and can lead to directory transversal and arbitrary code execution in SQL-Ledger (2.6.18 and earlier) and LedgerSMB (1.0.0 only). In particular, an attacker could upload a file called "login.pl" using these facilities. The attacher could then pass a specially malformed url to the web server that would cause it to execute the code. The form of the url might be: http://hostname/path/login.pl?termina=../css In the course of our disclosure, we sent a notification to the developer of SQL-Ledger who quickly patched his software. All customers should upgrade to the newest versions of these packages at their earliest convenience. Credit for this disclosure should go to Chris Murtagh (a private individual) and Richard Patterson of Quickhelp. Best Wishes, Chris Travers Metatron Technology Consulting begin:vcard fn:Chris Travers n:Travers;Chris email;internet:chris (at) metatrontech (dot) com [email concealed] tel;work:509-888-0220 tel;cell:509-630-7794 x-mozilla-html:FALSE version:2.1 end:vcard


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