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Fix uninitialised pointer dereference

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Manuel Pégourié-Gonnard 2014-11-11 22:17:26 +01:00
parent e9271e6835
commit 0369a5291b
3 changed files with 11 additions and 0 deletions
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5
ChangeLog
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@ -2,6 +2,11 @@ PolarSSL ChangeLog (Sorted per branch, date)
= PolarSSL 1.3.z branch
Security
* Fix remotely-triggerable uninitialised pointer dereference caused by
crafted X.509 certificate (server is not affected if it doesn't ask for a
client certificate) (found using Codenomicon Defensics).
Features
* Add function pk_check_pair() to test if public and private keys match.

2
library/asn1parse.c
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@ -278,6 +278,8 @@ int asn1_get_sequence_of( unsigned char **p,
if( cur->next == NULL )
return( POLARSSL_ERR_ASN1_MALLOC_FAILED );
memset( cur->next, 0, sizeof( asn1_sequence ) );
cur = cur->next;
}
}

4
tests/suites/test_suite_x509parse.data
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@ -869,6 +869,10 @@ X509 Certificate ASN1 (TBSCertificate v3, ext BasicContraint tag, octet len mism
depends_on:POLARSSL_RSA_C
x509parse_crt:"3081a230819fa0030201028204deadbeef300d06092a864886f70d0101020500300c310a30080600130454657374301c170c303930313031303030303030170c303931323331323335393539300c310a30080600130454657374302a300d06092A864886F70D010101050003190030160210ffffffffffffffffffffffffffffffff0202ffffa101aaa201bba317301530130603551d130101010409300702010102010100":"":POLARSSL_ERR_X509_INVALID_EXTENSIONS + POLARSSL_ERR_ASN1_LENGTH_MISMATCH
X509 Certificate ASN1 (ExtKeyUsage, bad second tag)
depends_on:POLARSSL_ECP_C:POLARSSL_ECP_DP_SECP256R1_ENABLED
x509parse_crt:"3081de3081dba003020102020900ebdbcd14105e1839300906072a8648ce3d0401300f310d300b0603550403130454657374301e170d3134313131313230353935345a170d3234313130383230353935345a300f310d300b06035504031304546573743059301306072a8648ce3d020106082a8648ce3d0301070342000437cc56d976091e5a723ec7592dff206eee7cf9069174d0ad14b5f768225962924ee500d82311ffea2fd2345d5d16bd8a88c26b770d55cd8a2a0efa01c8b4edffa321301f301d0603551d250416301406082b0601050507030107082b06010505070302":"":POLARSSL_ERR_X509_INVALID_EXTENSIONS + POLARSSL_ERR_ASN1_UNEXPECTED_TAG
X509 Certificate ASN1 (correct pubkey, no sig_alg)
depends_on:POLARSSL_RSA_C
x509parse_crt:"308183308180a0030201008204deadbeef300d06092a864886f70d0101020500300c310a30080600130454657374301c170c303930313031303030303030170c303931323331323335393539300c310a30080600130454657374302a300d06092A864886F70D010101050003190030160210ffffffffffffffffffffffffffffffff0202ffff":"":POLARSSL_ERR_X509_INVALID_ALG + POLARSSL_ERR_ASN1_OUT_OF_DATA