Fix multiple vulnerabilities in OpenSSL.

Approved by:    so
Security:       SA-21:17.openssl
Security:	CVE-2021-23840
Security:	CVE-2021-23841
This commit is contained in:
Gordon Tetlow 2021-08-24 11:09:09 -07:00 committed by Franco Fichtner
parent 59892f6f86
commit e47450a056
5 changed files with 37 additions and 6 deletions

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@ -1,4 +1,4 @@
# Copyright 1999-2019 The OpenSSL Project Authors. All Rights Reserved.
# Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the OpenSSL license (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
@ -2275,6 +2275,7 @@ EVP_R_ONLY_ONESHOT_SUPPORTED:177:only oneshot supported
EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE:150:\
operation not supported for this keytype
EVP_R_OPERATON_NOT_INITIALIZED:151:operaton not initialized
EVP_R_OUTPUT_WOULD_OVERFLOW:184:output would overflow
EVP_R_PARTIALLY_OVERLAPPING:162:partially overlapping buffers
EVP_R_PBKDF2_ERROR:181:pbkdf2 error
EVP_R_PKEY_APPLICATION_ASN1_METHOD_ALREADY_REGISTERED:179:\

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@ -8,6 +8,7 @@
*/
#include <stdio.h>
#include <limits.h>
#include <assert.h>
#include "internal/cryptlib.h"
#include <openssl/evp.h>
@ -348,6 +349,19 @@ static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
return 1;
} else {
j = bl - i;
/*
* Once we've processed the first j bytes from in, the amount of
* data left that is a multiple of the block length is:
* (inl - j) & ~(bl - 1)
* We must ensure that this amount of data, plus the one block that
* we process from ctx->buf does not exceed INT_MAX
*/
if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) {
EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE,
EVP_R_OUTPUT_WOULD_OVERFLOW);
return 0;
}
memcpy(&(ctx->buf[i]), in, j);
inl -= j;
in += j;
@ -489,6 +503,19 @@ int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
return 0;
}
/*
* final_used is only ever set if buf_len is 0. Therefore the maximum
* length output we will ever see from evp_EncryptDecryptUpdate is
* the maximum multiple of the block length that is <= inl, or just:
* inl & ~(b - 1)
* Since final_used has been set then the final output length is:
* (inl & ~(b - 1)) + b
* This must never exceed INT_MAX
*/
if ((inl & ~(b - 1)) > INT_MAX - b) {
EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_OUTPUT_WOULD_OVERFLOW);
return 0;
}
memcpy(out, ctx->final, b);
out += b;
fix_len = 1;

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@ -1,6 +1,6 @@
/*
* Generated by util/mkerr.pl DO NOT EDIT
* Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
@ -238,6 +238,8 @@ static const ERR_STRING_DATA EVP_str_reasons[] = {
"operation not supported for this keytype"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_OPERATON_NOT_INITIALIZED),
"operaton not initialized"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_OUTPUT_WOULD_OVERFLOW),
"output would overflow"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_PARTIALLY_OVERLAPPING),
"partially overlapping buffers"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_PBKDF2_ERROR), "pbkdf2 error"},

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@ -39,6 +39,8 @@ unsigned long X509_issuer_and_serial_hash(X509 *a)
if (ctx == NULL)
goto err;
f = X509_NAME_oneline(a->cert_info.issuer, NULL, 0);
if (f == NULL)
goto err;
if (!EVP_DigestInit_ex(ctx, EVP_md5(), NULL))
goto err;
if (!EVP_DigestUpdate(ctx, (unsigned char *)f, strlen(f)))

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@ -1,6 +1,6 @@
/*
* Generated by util/mkerr.pl DO NOT EDIT
* Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
@ -11,9 +11,7 @@
#ifndef HEADER_EVPERR_H
# define HEADER_EVPERR_H
# ifndef HEADER_SYMHACKS_H
# include <openssl/symhacks.h>
# endif
# include <openssl/symhacks.h>
# ifdef __cplusplus
extern "C"
@ -178,6 +176,7 @@ int ERR_load_EVP_strings(void);
# define EVP_R_ONLY_ONESHOT_SUPPORTED 177
# define EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE 150
# define EVP_R_OPERATON_NOT_INITIALIZED 151
# define EVP_R_OUTPUT_WOULD_OVERFLOW 184
# define EVP_R_PARTIALLY_OVERLAPPING 162
# define EVP_R_PBKDF2_ERROR 181
# define EVP_R_PKEY_APPLICATION_ASN1_METHOD_ALREADY_REGISTERED 179