Mandriva Linux Security Advisory 2015-072 - Suman Jana reported a vulnerability that affects the certificate verification functions of gnutls 3.1.x and gnutls 3.2.x. A version 1 intermediate certificate will be considered as a CA certificate by default. It was discovered that GnuTLS did not correctly handle certain errors that could occur during the verification of an X.509 certificate, causing it to incorrectly report a successful verification. An attacker could use this flaw to create a specially crafted certificate that could be accepted by GnuTLS as valid for a site chosen by the attacker. A NULL pointer dereference flaw was discovered in GnuTLS's gnutls_x509_dn_oid_name(). The function, when called with the GNUTLS_X509_DN_OID_RETURN_OID flag, should not return NULL to its caller. However, it could previously return NULL when parsed X.509 certificates included specific OIDs. A flaw was found in the way GnuTLS parsed session ids from Server Hello packets of the TLS/SSL handshake. A malicious server could use this flaw to send an excessively long session id value and trigger a buffer overflow in a connecting TLS/SSL client using GnuTLS, causing it to crash or, possibly, execute arbitrary code. An out-of-bounds memory write flaw was found in the way GnuTLS parsed certain ECC certificates or certificate signing requests. A malicious user could create a specially crafted ECC certificate or a certificate signing request that, when processed by an application compiled against GnuTLS (for example, certtool), could cause that application to crash or execute arbitrary code with the permissions of the user running the application.
d54e07c39568448fc8ce57614a5d9fa432224b556e5e7e077010ba9803d59272Gentoo Linux Security Advisory 201406-9 - Multiple vulnerabilities have been discovered in GnuTLS, the worst of which could lead to arbitrary code execution. Versions less than 2.12.23-r6 are affected.
c9e57007e1e2c16ca271f1ad218866fe2a98937c85f28534d1b3cafa77b79278Red Hat Security Advisory 2014-0339-01 - The rhev-hypervisor6 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine hypervisor. It includes everything necessary to run and manage virtual machines: a subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent. Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions. It was discovered that GnuTLS did not correctly handle certain errors that could occur during the verification of an X.509 certificate, causing it to incorrectly report a successful verification. An attacker could use this flaw to create a specially crafted certificate that could be accepted by GnuTLS as valid for a site chosen by the attacker.
27433747bde26addd9b3464670fd4f3098c0354c6a1ecdaa823c9aff3f2c26eeRed Hat Security Advisory 2014-0288-01 - The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security. It was discovered that GnuTLS did not correctly handle certain errors that could occur during the verification of an X.509 certificate, causing it to incorrectly report a successful verification. An attacker could use this flaw to create a specially crafted certificate that could be accepted by GnuTLS as valid for a site chosen by the attacker. This issue was discovered by Nikos Mavrogiannopoulos of the Red Hat Security Technologies Team.
0a170a8ff50ca1817d8dbb1bf5337a87577fa4be6ead12ecab8af5254403d619Mandriva Linux Security Advisory 2014-048 - It was discovered that GnuTLS did not correctly handle certain errors that could occur during the verification of an X.509 certificate, causing it to incorrectly report a successful verification. An attacker could use this flaw to create a specially crafted certificate that could be accepted by GnuTLS as valid for a site chosen by the attacker.
3ce0f32f5ce56849a4c33a25e7f469b1c11cf2283019c23c3438a49e62da8402Ubuntu Security Notice 2127-1 - Nikos Mavrogiannopoulos discovered that GnuTLS incorrectly handled certificate verification functions. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited with specially crafted certificates to view sensitive information.
d993f7ca19f48ae97e6efa1f068cac1e38adac6d808387d1c7002cb567aff191Slackware Security Advisory - New gnutls packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, and -current to fix a security issue.
d2fbe6a04e9c821c822111c7e9e0feff0b368ca90b59ebcf0371f30d2bcd3c80Debian Linux Security Advisory 2869-1 - Nikos Mavrogiannopoulos of Red Hat discovered an X.509 certificate verification issue in GnuTLS, an SSL/TLS library. A certificate validation could be reported successfully even in cases were an error would prevent all verification steps to be performed.
4051fda1725c49e1b37ba9a446a6b871a75ffc03ece3782ad6ac57fc31750d7bRed Hat Security Advisory 2014-0247-01 - The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security. It was discovered that GnuTLS did not correctly handle certain errors that could occur during the verification of an X.509 certificate, causing it to incorrectly report a successful verification. An attacker could use this flaw to create a specially crafted certificate that could be accepted by GnuTLS as valid for a site chosen by the attacker. A flaw was found in the way GnuTLS handled version 1 X.509 certificates. An attacker able to obtain a version 1 certificate from a trusted certificate authority could use this flaw to issue certificates for other sites that would be accepted by GnuTLS as valid.
326ee8034637a4e66c55990e111e0d88f7d48d299e523235319d603d7db909b6Red Hat Security Advisory 2014-0246-01 - The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security. It was discovered that GnuTLS did not correctly handle certain errors that could occur during the verification of an X.509 certificate, causing it to incorrectly report a successful verification. An attacker could use this flaw to create a specially crafted certificate that could be accepted by GnuTLS as valid for a site chosen by the attacker. The CVE-2014-0092 issue was discovered by Nikos Mavrogiannopoulos of the Red Hat Security Technologies Team.
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