Memory leak in PolarSSL before 1.2.12 and 1.3.x before 1.3.9 allows remote attackers to cause a denial of service (memory consumption) via a large number of crafted X.509 certificates. NOTE: this identifier has been SPLIT per ADT3 due to different affected versions. See CVE-2014-9744 for the ClientHello message issue.

The asn1_get_sequence_of function in library/asn1parse.c in PolarSSL 1.0 through 1.2.12 and 1.3.x through 1.3.9 does not properly initialize a pointer in the asn1_sequence linked list, which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a crafted ASN.1 sequence in a certificate.

PolarSSL 1.3.8 does not properly negotiate the signature algorithm to use, which allows remote attackers to conduct downgrade attacks via unspecified vectors.