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| author | Marc-André Lureau <marcandre.lureau@redhat.com> | 2021-06-04 16:15:14 +0400 |
|---|---|---|
| committer | Marc-André Lureau <marcandre.lureau@redhat.com> | 2021-06-14 11:42:11 +0400 |
| commit | 2eca0838eee1da96204545e22cdaed860d9d7c6c (patch) | |
| tree | ae768151f9b6bb83b45ca56d887b67a4652127fb | |
| parent | f13cad45b25d92760bb0ad67bec0300a4d7d5275 (diff) | |
| download | slirp-2eca0838eee1da96204545e22cdaed860d9d7c6c.zip slirp-2eca0838eee1da96204545e22cdaed860d9d7c6c.tar.gz slirp-2eca0838eee1da96204545e22cdaed860d9d7c6c.tar.bz2 | |
bootp: check bootp_input buffer size
Fixes: CVE-2021-3592
Fixes: https://gitlab.freedesktop.org/slirp/libslirp/-/issues/44
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
| -rw-r--r-- | src/bootp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/bootp.c b/src/bootp.c index e0db8d1..cafa1eb 100644 --- a/src/bootp.c +++ b/src/bootp.c @@ -365,9 +365,9 @@ static void bootp_reply(Slirp *slirp, void bootp_input(struct mbuf *m) { - struct bootp_t *bp = mtod(m, struct bootp_t *); + struct bootp_t *bp = mtod_check(m, sizeof(struct bootp_t)); - if (bp->bp_op == BOOTP_REQUEST) { + if (bp && bp->bp_op == BOOTP_REQUEST) { bootp_reply(m->slirp, bp, m_end(m)); } } |