I did this

curl --insecure --user ozanadmin@corp.sunnyvalley.io:Ozn.1234! ldap://172.16.43.167:389/DC=corp,DC=sunnyvalley,DC=io??sub?(|(userPrincipalName=ozanadmin@corp.sunnyvalley.io)(sAMAccountName=ozanadmin@corp.sunnyvalley.io))

When i run this command it crashes with segmentation fault.

• Curl binary is built from master but it is same in 8.5.0. According to my findings, it is related with openldap.c. It doesn't happen with ldap.c. It doesn't happen when i use ldaps.

Console output at the segmentation fault.

*   Trying 172.16.43.167:389...
* Connected to 172.16.43.167 (172.16.43.167) port 389
* LDAP local: ldap://172.16.43.167:389/DC=corp,DC=sunnyvalley,DC=io

Why does it crash ?

At this line li->send is NULL so it gives segmentation fault.

Core file with binary (ubuntu 22.04) (commit: 9faeebc)

core-dump-commit-9faeebca883b3d8a57ca291e4f1b80382e236b5a.zip

I expected the following

Working without crash. If it doesn't support ldap and ldaps in the same binary, it can give helpful message and exit gracefully.

curl/libcurl version

curl 8.6.0-DEV (Linux) libcurl/8.6.0-DEV OpenSSL/3.0.2 zlib/1.2.11 libidn2/2.3.2 libpsl/0.21.0 (+libidn2/2.3.2) OpenLDAP/2.5.16
Release-Date: [unreleased]
Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns ldap ldaps mqtt pop3 pop3s rtsp smb smbs smtp smtps telnet tftp
Features: alt-svc AsynchDNS HSTS HTTPS-proxy IDN IPv6 Largefile libz NTLM PSL SSL threadsafe TLS-SRP UnixSockets

operating system

Linux ozanc-dev 6.2.0-39-generic #40~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Nov 16 10:53:04 UTC 2 x86_64 x86_64 x86_64 GNU/Linux