From: Mimi Zohar <zohar@linux.ibm.com>
To: linux-integrity@vger.kernel.org
Cc: Mimi Zohar <zohar@linux.ibm.com>, Petr Vorel <pvorel@suse.cz>,
Vitaly Chikunov <vt@altlinux.org>,
Stefan Berger <stefanb@linux.ibm.com>
Subject: [PATCH ima-evm-utils 09/11] Fix potential use after free in read_tpm_banks()
Date: Fri, 2 Sep 2022 12:28:34 -0400 [thread overview]
Message-ID: <20220902162836.554839-10-zohar@linux.ibm.com> (raw)
In-Reply-To: <20220902162836.554839-1-zohar@linux.ibm.com>
On failure to read TPM 2.0 bank PCRs 'errmsg' is not properly set to
NULL after being freed. Fix potential use after free.
Fixes: 3472f9ba9c05 ("ima-evm-utils: read the PCRs for the requested TPM banks")
Reviewed-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
---
src/evmctl.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/evmctl.c b/src/evmctl.c
index fa588e0caba2..a497b1a468d6 100644
--- a/src/evmctl.c
+++ b/src/evmctl.c
@@ -2075,6 +2075,7 @@ static int read_tpm_banks(int num_banks, struct tpm_bank_info *bank)
log_debug("Failed to read %s PCRs: (%s)\n",
bank[i].algo_name, errmsg);
free(errmsg);
+ errmsg = NULL;
bank[i].supported = 0;
}
}
--
2.31.1
next prev parent reply other threads:[~2022-09-02 16:29 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-02 16:28 [PATCH ima-evm-utils 00/11] address deprecated warnings Mimi Zohar
2022-09-02 16:28 ` [PATCH ima-evm-utils 01/11] travis: use the distro OpenSSL version on jammy Mimi Zohar
2022-09-02 16:28 ` [PATCH ima-evm-utils 02/11] travis: update dist=focal Mimi Zohar
2022-09-02 20:24 ` Stefan Berger
2022-09-06 18:27 ` Mimi Zohar
2022-09-02 16:28 ` [PATCH ima-evm-utils 03/11] Update configure.ac to address a couple of obsolete warnings Mimi Zohar
2022-09-02 16:28 ` [PATCH ima-evm-utils 04/11] Deprecate IMA signature version 1 Mimi Zohar
2022-09-02 19:25 ` Stefan Berger
2022-09-02 16:28 ` [PATCH ima-evm-utils 05/11] Replace the low level SHA1 calls when calculating the TPM 1.2 PCRs Mimi Zohar
2022-09-02 20:18 ` Stefan Berger
2022-09-02 16:28 ` [PATCH ima-evm-utils 06/11] Replace the low level HMAC calls when calculating the EVM HMAC Mimi Zohar
2022-09-02 16:28 ` [PATCH ima-evm-utils 07/11] Add missing EVP_MD_CTX_free() call in calc_evm_hash() Mimi Zohar
2022-09-02 16:28 ` [PATCH ima-evm-utils 08/11] Deprecate use of OpenSSL v3 "engine" support Mimi Zohar
2022-09-04 3:08 ` Vitaly Chikunov
2022-09-04 16:26 ` Mimi Zohar
2022-09-02 16:28 ` Mimi Zohar [this message]
2022-09-02 16:28 ` [PATCH ima-evm-utils 10/11] Limit the file hash algorithm name length Mimi Zohar
2022-09-02 16:28 ` [PATCH ima-evm-utils 11/11] Missing template data size lower bounds checking Mimi Zohar
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