From 7fd2267eca87bd9bcfe5e66e95e2e683bda1533b Mon Sep 17 00:00:00 2001 From: Jonathan McDowell Date: Mon, 22 Aug 2016 23:14:24 +0100 Subject: [PATCH] Add sanity check for PGP packet version At present only PGP packet versions up to 4 are supported. There's no indication version 5+ will be backwards compatible, so if we see anything higher it indicates something unsupported. Fixes some issues found using American Fuzzy Lop. --- parsekey.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/parsekey.c b/parsekey.c index 008248e..f9b1465 100644 --- a/parsekey.c +++ b/parsekey.c @@ -354,6 +354,12 @@ onak_status_t read_openpgp_stream(int (*getchar_func)(void *ctx, size_t count, } else { rc = ONAK_E_INVALID_PKT; } + if (rc == ONAK_E_OK) { + /* Make sure the packet version is sane */ + if (curpacket->packet->data[0] > 4) { + rc = ONAK_E_INVALID_PKT; + } + } } if (packetend != NULL) { -- 2.39.2