realloc_format_trap expects the second parameter to be the input
buffer's length, but instead it was sent sizeof(char*). When the
host name was shorter than that, realloc_format_trap would write to
unallocated memory, potentially crashing the daemon.
---
apps/snmptrapd_sql.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/apps/snmptrapd_sql.c b/apps/snmptrapd_sql.c
index ccba258..628c9bf 100644
--- a/apps/snmptrapd_sql.c
+++ b/apps/snmptrapd_sql.c
@@ -730,7 +730,7 @@ _sql_save_trap_info(sql_buf *sqlb, netsnmp_pdu *pdu,
/** host name */
buf_host_len_t = 0;
- tmp_size = sizeof(sqlb->host);
+ tmp_size = 0;
realloc_format_trap((u_char**)&sqlb->host, &tmp_size,
&buf_host_len_t, 1, "%B", pdu, transport);
sqlb->host_len = buf_host_len_t;
--
1.7.11.7
------------------------------------------------------------------------------
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