Sip2 telnet #401
Sip2 telnet #401
Conversation
![codereviewbot-ai[bot]](https://avatars.githubusercontent.com/in/309638?s=60&v=4){kind=small}
| or $log->fatal("ERROR in Socket Creation : $!\n") | ||
| && ( $test_mode && die "ERROR in Socket Creation : $!\n" ); |
There was a problem hiding this comment.
The error handling logic in line 56 uses or and && operators, which might not behave as expected due to operator precedence. This could lead to the die statement not being executed when the socket creation fails in non-test mode.
Recommended Solution:
Use parentheses to ensure the correct execution order, or consider restructuring the logic to handle errors more explicitly, possibly using an if statement to check the result of the socket creation and then handling the error accordingly.
| if ($sip_enable_telnet_login) { | ||
| $log->debug("Telnet login enabled"); | ||
| $telnet = new Net::Telnet( Fhopen => $socket ); | ||
| $sip_username = $config->{SIP}->{username}; | ||
| $sip_password = $config->{SIP}->{password}; | ||
| $sip_telnet_login_prompt = $config->{SIP}->{telnet_login_prompt}; | ||
| $ok = $telnet->login( | ||
| Name => $sip_username, | ||
| Password => $sip_password, | ||
| Prompt => '/' . quotemeta($sip_telnet_login_prompt) . '/', | ||
| Errmode => 'return' | ||
| ); | ||
| if ( !$ok ) { | ||
| $telnet_error = $telnet->errmsg; | ||
| $log->debug("Telnet error: $telnet_error"); | ||
| say "telnet error: $telnet_error" if $test_mode; | ||
| return { success => 0, error => 'SIP_AUTH_FAILURE', user => $user }; | ||
| } | ||
| } |
There was a problem hiding this comment.
The code enables Telnet login if sip_enable_telnet_login is set. Telnet is inherently insecure as it transmits data, including passwords, in plaintext, which can be intercepted by malicious actors.
Recommended Solution:
Consider using a more secure protocol such as SSH for remote logins or ensure that Telnet is only used in a secure, controlled environment. Additionally, ensure that sensitive information is encrypted during transmission to safeguard against eavesdropping.
![korbit-ai[bot]](https://avatars.githubusercontent.com/in/322216?s=60&v=4){kind=small}
There was a problem hiding this comment.
Review by Korbit AI
Korbit automatically attempts to detect when you fix issues in new commits.
| Category | Issue | Status |
|---|---|---|
 |
Inconsistent Assignment Alignment ▹ view | |
 |
Missing Telnet Configuration Validation ▹ view | |
 |
Missing Telnet Connection Cleanup ▹ view |
Files scanned
| File Path | Reviewed |
|---|---|
| lib/Libki/SIP.pm | ✅ |
Explore our documentation to understand the languages and file types we support and the files we ignore.
Check out our docs on how you can make Korbit work best for you and your team.
| $ok = $telnet->login( | ||
| Name => $sip_username, | ||
| Password => $sip_password, | ||
| Prompt => '/' . quotemeta($sip_telnet_login_prompt) . '/', | ||
| Errmode => 'return' | ||
| ); |
There was a problem hiding this comment.
Missing Telnet Configuration Validation 
Tell me more
What is the issue?
The telnet login attempt doesn't verify if required configuration parameters (username, password, telnet_login_prompt) exist before using them.
Why this matters
Missing configuration parameters could cause the telnet login to fail silently or with unclear error messages, making it difficult to diagnose authentication issues.
Suggested change ∙ Feature Preview
Add validation before attempting telnet login:
if ($sip_enable_telnet_login) {
unless ($config->{SIP}->{username} && $config->{SIP}->{password} && $config->{SIP}->{telnet_login_prompt}) {
$log->error("Missing required Telnet configuration parameters");
return { success => 0, error => 'TELNET_CONFIG_ERROR', user => $user };
}
# ... rest of telnet login code ...
}Provide feedback to improve future suggestions
💬 Looking for more details? Reply to this comment to chat with Korbit.
| if ($sip_enable_telnet_login) { | ||
| $log->debug("Telnet login enabled"); | ||
| $telnet = new Net::Telnet( Fhopen => $socket ); | ||
| $sip_username = $config->{SIP}->{username}; | ||
| $sip_password = $config->{SIP}->{password}; | ||
| $sip_telnet_login_prompt = $config->{SIP}->{telnet_login_prompt}; | ||
| $ok = $telnet->login( | ||
| Name => $sip_username, | ||
| Password => $sip_password, | ||
| Prompt => '/' . quotemeta($sip_telnet_login_prompt) . '/', | ||
| Errmode => 'return' | ||
| ); | ||
| if ( !$ok ) { | ||
| $telnet_error = $telnet->errmsg; | ||
| $log->debug("Telnet error: $telnet_error"); | ||
| say "telnet error: $telnet_error" if $test_mode; | ||
| return { success => 0, error => 'SIP_AUTH_FAILURE', user => $user }; | ||
| } |
There was a problem hiding this comment.
Missing Telnet Connection Cleanup 
Tell me more
What is the issue?
The code doesn't properly handle closing the telnet connection after use, which could lead to resource leaks.
Why this matters
Unclosed telnet connections can accumulate over time, potentially exhausting system resources and causing connection failures.
Suggested change ∙ Feature Preview
Add proper connection cleanup:
my $telnet;
if ($sip_enable_telnet_login) {
$telnet = new Net::Telnet( Fhopen => $socket );
# ... rest of telnet code ...
}
# Add at end of authenticate_via_sip function, before the final return:
$telnet->close() if $telnet;Provide feedback to improve future suggestions
💬 Looking for more details? Reply to this comment to chat with Korbit.
| my $sip_enable_telnet_login = $config->{SIP}->{sip_enable_telnet_login}; | ||
|
|
||
| $log->debug("SIP SERVER: $host:$port"); | ||
| say "SIP SERVER: $host:$port" if $test_mode; |
There was a problem hiding this comment.
Using say for outputting sensitive information such as SIP server addresses in a production environment can lead to security risks if the output is accessible in shared logs or consoles. This practice should be avoided or secured to ensure that sensitive information is not exposed.
Recommended Solution:
Consider using controlled logging mechanisms with appropriate access restrictions instead of using say for debugging outputs.
2 participants
This PR implements telnet login using Net::Telnet for SIP servers that have it enabled.
Description by Korbit AI
What change is being made?
Add Net::Telnet dependency and implement optional Telnet-based login for SIP authentication when configured via SIP.sip_enable_telnet_login, including prompt handling, credentials, and error reporting.
Why are these changes being made?
To support an alternate SIP authentication method via Telnet when explicitly enabled, enabling compatibility with environments that require Telnet-based login. If not enabled, behavior remains unchanged.