diff options
author | Dr. Stephen Henson <steve@openssl.org> | 2011-10-09 00:56:32 +0000 |
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committer | Dr. Stephen Henson <steve@openssl.org> | 2011-10-09 00:56:32 +0000 |
commit | 42369021edac994f585fc6cde2536b7481bdac19 (patch) | |
tree | 70c59a3c84d43bbdcc907a302808b80ed7fbad56 | |
parent | b00fe7ce18692c8d0bf7cd52f6d27f977a95e35b (diff) |
PR: 2482
Submitted by: Rob Austein <sra@hactrn.net>
Reviewed by: steve
Don't allow inverted ranges in RFC3779 code, discovered by Frank Ellermann.
-rw-r--r-- | crypto/x509v3/v3_addr.c | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/crypto/x509v3/v3_addr.c b/crypto/x509v3/v3_addr.c index 0d70e8696d..76a57222db 100644 --- a/crypto/x509v3/v3_addr.c +++ b/crypto/x509v3/v3_addr.c @@ -383,6 +383,7 @@ static int range_should_be_prefix(const unsigned char *min, unsigned char mask; int i, j; + OPENSSL_assert(memcmp(min, max, length) <= 0); for (i = 0; i < length && min[i] == max[i]; i++) ; for (j = length - 1; j >= 0 && min[j] == 0x00 && max[j] == 0xFF; j--) @@ -800,14 +801,16 @@ int v3_addr_is_canonical(IPAddrBlocks *addr) } /* - * Check final range to see if it should be a prefix. + * Check range to see if it's inverted or should be a + * prefix. */ j = sk_IPAddressOrRange_num(aors) - 1; { IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, j); - if (a->type == IPAddressOrRange_addressRange) { + if (a != NULL && a->type == IPAddressOrRange_addressRange) { extract_min_max(a, a_min, a_max, length); - if (range_should_be_prefix(a_min, a_max, length) >= 0) + if (memcmp(a_min, a_max, length) > 0 || + range_should_be_prefix(a_min, a_max, length) >= 0) return 0; } } @@ -845,6 +848,13 @@ static int IPAddressOrRanges_canonize(IPAddressOrRanges *aors, extract_min_max(b, b_min, b_max, length); /* + * Punt inverted ranges. + */ + if (memcmp(a_min, a_max, length) > 0 || + memcmp(b_min, b_max, length) > 0) + return 0; + + /* * Punt overlaps. */ if (memcmp(a_max, b_min, length) >= 0) @@ -869,6 +879,20 @@ static int IPAddressOrRanges_canonize(IPAddressOrRanges *aors, } } + /* + * Check for inverted final range. + */ + j = sk_IPAddressOrRange_num(aors) - 1; + { + IPAddressOrRange *a = sk_IPAddressOrRange_value(aors, j); + if (a != NULL && a->type == IPAddressOrRange_addressRange) { + unsigned char a_min[ADDR_RAW_BUF_LEN], a_max[ADDR_RAW_BUF_LEN]; + extract_min_max(a, a_min, a_max, length); + if (memcmp(a_min, a_max, length) > 0) + return 0; + } + } + return 1; } @@ -1017,6 +1041,11 @@ static void *v2i_IPAddrBlocks(const struct v3_ext_method *method, X509V3_conf_err(val); goto err; } + if (memcmp(min, max, length_from_afi(afi)) > 0) { + X509V3err(X509V3_F_V2I_IPADDRBLOCKS, X509V3_R_EXTENSION_VALUE_ERROR); + X509V3_conf_err(val); + goto err; + } if (!v3_addr_add_range(addr, afi, safi, min, max)) { X509V3err(X509V3_F_V2I_IPADDRBLOCKS, ERR_R_MALLOC_FAILURE); goto err; |