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| author | Ivo Roylev <ivo.roylev@oracle.com> | 2018-06-14 17:27:54 +0300 |
|---|---|---|
| committer | Ivo Roylev <ivo.roylev@oracle.com> | 2018-06-14 17:27:54 +0300 |
| commit | cad692f919493e2176d52984415561496e13833d (patch) | |
| tree | 554ec8a7962cd6524416048325bb235906751d56 | |
| parent | 7b2f4b82ea4dd8a63c2806c452b319f26493206c (diff) | |
| download | mariadb-git-cad692f919493e2176d52984415561496e13833d.tar.gz | |
Bug#27980823: HEAP OVERFLOW VULNERABILITIES IN MYSQL CLIENT LIBRARY
| -rw-r--r-- | sql-common/client.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sql-common/client.c b/sql-common/client.c index 3247fd8e339..7938403db59 100644 --- a/sql-common/client.c +++ b/sql-common/client.c @@ -1505,7 +1505,8 @@ unpack_fields(MYSQL *mysql, MYSQL_DATA *data,MEM_ROOT *alloc,uint fields, { uchar *pos; /* fields count may be wrong */ - DBUG_ASSERT((uint) (field - result) < fields); + if (field < result || (uint) (field - result) >= fields) + DBUG_RETURN(NULL); cli_fetch_lengths(&lengths[0], row->data, default_value ? 8 : 7); field->catalog= strmake_root(alloc,(char*) row->data[0], lengths[0]); field->db= strmake_root(alloc,(char*) row->data[1], lengths[1]); @@ -1612,6 +1613,7 @@ MYSQL_DATA *cli_read_rows(MYSQL *mysql,MYSQL_FIELD *mysql_fields, if ((pkt_len= cli_safe_read(mysql)) == packet_error) DBUG_RETURN(0); + if (pkt_len == 0) DBUG_RETURN(0); if (!(result=(MYSQL_DATA*) my_malloc(sizeof(MYSQL_DATA), MYF(MY_WME | MY_ZEROFILL)))) { |