diff options
Diffstat (limited to 'modules/pam_unix/pam_unix_passwd.c')
| -rw-r--r-- | modules/pam_unix/pam_unix_passwd.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/modules/pam_unix/pam_unix_passwd.c b/modules/pam_unix/pam_unix_passwd.c index c7ee28c9..8921d1cc 100644 --- a/modules/pam_unix/pam_unix_passwd.c +++ b/modules/pam_unix/pam_unix_passwd.c @@ -1037,11 +1037,10 @@ PAM_EXTERN int pam_sm_chauthtok(pam_handle_t * pamh, int flags, if (retval == PAM_SUCCESS) { /* * Various libraries at various times have had bugs related to - * '+' or '-' as the first character of a user name. Don't take - * any chances here. Require that the username starts with an - * alphanumeric character. + * '+' or '-' as the first character of a user name. Don't + * allow them. */ - if (user == NULL || !isalnum(*user)) { + if (user == NULL || user[0] == '-' || user[0] == '+') { pam_syslog(pamh, LOG_ERR, "bad username [%s]", user); return PAM_USER_UNKNOWN; } |