diff options
Diffstat (limited to 'libssh')
| -rw-r--r-- | libssh/client.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/libssh/client.c b/libssh/client.c index c248083f..12ebf598 100644 --- a/libssh/client.c +++ b/libssh/client.c @@ -110,13 +110,15 @@ static int ssh_analyze_banner(ssh_session session, int *ssh1, int *ssh2) { const char *banner = session->serverbanner; const char *openssh; - ssh_log(session, SSH_LOG_RARE, "Analyzing banner: %s", banner); - - if (strncmp(banner, "SSH-", 4) != 0) { + if (banner == NULL || + strlen(banner) <= 4 || + strncmp(banner, "SSH-", 4) != 0) { ssh_set_error(session, SSH_FATAL, "Protocol mismatch: %s", banner); return -1; } + ssh_log(session, SSH_LOG_RARE, "Analyzing banner: %s", banner); + /* * Typical banners e.g. are: * SSH-1.5-blah |