commit 7c78bd4be810ddceb8f13585a921946cc98f5fbd
author Kan <chenxinpingc2306@163.com> Fri Dec 17 00:35:32 2021 +0800
committer Pauli <pauli@openssl.org> Thu Dec 23 12:52:53 2021 +1100
tree b0bcac78955b2f209671ae691512439e410561de
parent a595e3286ae9f033c56452967b3add2145f9085f

Add static check in BN_hex2bn

Fixes #17298

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17299)

crypto/bn/bn_conv.c

diff --git a/crypto/bn/bn_conv.c b/crypto/bn/bn_conv.c
index 6757f3d..75054f5 100644
--- a/crypto/bn/bn_conv.c
+++ b/crypto/bn/bn_conv.c
@@ -154,6 +154,10 @@
             return 0;
     } else {
         ret = *bn;
+        if (BN_get_flags(ret, BN_FLG_STATIC_DATA)) {
+            ERR_raise(ERR_LIB_BN, ERR_R_PASSED_INVALID_ARGUMENT);
+            return 0;
+        }
         BN_zero(ret);
     }