From 5866cb0a09876d6b2a84006bda8aa9de7ea467fd Mon Sep 17 00:00:00 2001 From: Spenser Reinhardt Date: Sun, 22 Jun 2014 15:34:25 -0500 Subject: plugins/check_http.c - leakage fix Coverity 66514 - Possible leakage and overflow with addr in redirect functionality. Not confirmed as null terminated, and externally gathered. Restrict string comparisons and duplications by size. - SR --- plugins/check_http.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/plugins/check_http.c b/plugins/check_http.c index 92861d97..51679975 100644 --- a/plugins/check_http.c +++ b/plugins/check_http.c @@ -1243,6 +1243,7 @@ redir (char *pos, char *status_line) if (addr == NULL) die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate addr\n")); + memset(addr, 0, MAX_IPV4_HOSTLENGTH); url = malloc (strcspn (pos, "\r\n")); if (url == NULL) die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate URL\n")); @@ -1333,8 +1334,8 @@ redir (char *pos, char *status_line) max_depth, type, addr, i, url, (display_html ? "" : "")); if (server_port==i && - !strcmp(server_address, addr) && - (host_name && !strcmp(host_name, addr)) && + !strncmp(server_address, addr, MAX_IPV4_HOSTLENGTH) && + (host_name && !strncmp(host_name, addr, MAX_IPV4_HOSTLENGTH)) && !strcmp(server_url, url)) die (STATE_WARNING, _("HTTP WARNING - redirection creates an infinite loop - %s://%s:%d%s%s\n"), @@ -1343,11 +1344,11 @@ redir (char *pos, char *status_line) strcpy (server_type, type); free (host_name); - host_name = strdup (addr); + host_name = strndup (addr, MAX_IPV4_HOSTLENGTH); if (!(followsticky & STICKY_HOST)) { free (server_address); - server_address = strdup (addr); + server_address = strndup (addr, MAX_IPV4_HOSTLENGTH); } if (!(followsticky & STICKY_PORT)) { server_port = i; @@ -1366,6 +1367,7 @@ redir (char *pos, char *status_line) printf (_("Redirection to %s://%s:%d%s\n"), server_type, host_name ? host_name : server_address, server_port, server_url); + free(addr); check_http (); } -- cgit v1.2.3