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From: Vitaly Chikunov <vt@altlinux.org>
To: Mimi Zohar <zohar@linux.vnet.ibm.com>,
	Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
	linux-integrity@vger.kernel.org
Subject: [PATCH v1 2/5] ima-evm-utils: Fix possible strcpy overflow
Date: Sat, 13 Jul 2019 00:28:30 +0300
Message-ID: <20190712212833.29280-2-vt@altlinux.org> (raw)
In-Reply-To: <20190712212833.29280-1-vt@altlinux.org>

caps_str is passed from command line but copied into fixed-size buffer.
CID 229895.
---
 src/evmctl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/evmctl.c b/src/evmctl.c
index 39bc3d9..e07cff4 100644
--- a/src/evmctl.c
+++ b/src/evmctl.c
@@ -409,8 +409,9 @@ static int calc_evm_hash(const char *file, unsigned char *hash)
 		} else if (!strcmp(*xattrname, XATTR_NAME_CAPS) && (hmac_flags & HMAC_FLAG_CAPS_SET)) {
 			if (!caps_str)
 				continue;
-			strcpy(xattr_value, caps_str);
 			err = strlen(caps_str);
+			assert(err < sizeof(xattr_value));
+			strcpy(xattr_value, caps_str);
 		} else {
 			err = lgetxattr(file, *xattrname, xattr_value, sizeof(xattr_value));
 			if (err < 0) {
-- 
2.11.0


  reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-12 21:28 [PATCH v1 1/5] ima-evm-utils: Fix null dereference from file2bin to memcpy Vitaly Chikunov
2019-07-12 21:28 ` Vitaly Chikunov [this message]
2019-07-15 19:08   ` [PATCH v1 2/5] ima-evm-utils: Fix possible strcpy overflow Mimi Zohar
2019-07-15 20:05     ` Vitaly Chikunov
2019-07-12 21:28 ` [PATCH v1 3/5] ima-evm-utils: Fix memory leak in get_password Vitaly Chikunov
2019-07-12 21:28 ` [PATCH v1 4/5] ima-evm-utils: Fix file2bin stat and fopen relations Vitaly Chikunov
2019-07-15 19:09   ` Mimi Zohar
2019-07-15 20:04     ` Vitaly Chikunov
2019-07-12 21:28 ` [PATCH v1 5/5] ima-evm-utils: Add more error checking in add_file_hash Vitaly Chikunov
2019-07-15 19:08 ` [PATCH v1 1/5] ima-evm-utils: Fix null dereference from file2bin to memcpy Mimi Zohar

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