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| author | David Drysdale <drysdale@google.com> | 2017-05-22 10:54:10 +0100 |
|---|---|---|
| committer | Jaehyun Kim <jeik01.kim@samsung.com> | 2019-02-07 22:11:32 +0900 |
| commit | bb88e0f7959fb46214ad49e3b70f0812c8770d8f (patch) | |
| tree | c84635821d64e515873df3a955ea457d4d9d58b1 | |
| parent | 99c49e08750dc756c0c9634a6d12e0af81b9881c (diff) | |
| download | c-ares-tizen_4.0_tv.tar.gz c-ares-tizen_4.0_tv.tar.bz2 c-ares-tizen_4.0_tv.zip | |
ares_parse_naptr_reply: check sufficient datatizen_4.0_tv
Check that there is enough data for the required elements
of an NAPTR record (2 int16, 3 bytes for string lengths)
before processing a record.
Bug: https://c-ares.haxx.se/adv_20170620.html
Patch Link: https://c-ares.haxx.se/CVE-2017-1000381.patch
Change-Id: I45f9d4916818b658bcec928f4bee2457ba2124b5
Signed-off-by: Nishant Chaprana <n.chaprana@samsung.com>
| -rw-r--r-- | ares_parse_naptr_reply.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/ares_parse_naptr_reply.c b/ares_parse_naptr_reply.c index 0e37b02..6216ca7 100644 --- a/ares_parse_naptr_reply.c +++ b/ares_parse_naptr_reply.c @@ -110,6 +110,12 @@ ares_parse_naptr_reply (const unsigned char *abuf, int alen, status = ARES_EBADRESP; break; } + /* RR must contain at least 7 bytes = 2 x int16 + 3 x name */ + if (rr_len < 7) + { + status = ARES_EBADRESP; + break; + } /* Check if we are really looking at a NAPTR record */ if (rr_class == C_IN && rr_type == T_NAPTR) @@ -192,4 +198,3 @@ ares_parse_naptr_reply (const unsigned char *abuf, int alen, return ARES_SUCCESS; } - |