Mandriva Linux Security Advisory 2015-116 - Multiple buffer boundary check issues were discovered in libtasn1 library, causing it to read beyond the boundary of an allocated buffer. An untrusted ASN.1 input could cause an application using the library to crash. It was discovered that libtasn1 library function asn1_get_bit_der() could incorrectly report negative bit length of the value read from ASN.1 input. This could possibly lead to an out of bounds access in an application using libtasn1, for example in case if application tried to terminate read value with NUL byte. A NULL pointer dereference flaw was found in libtasn1's asn1_read_value_type() / asn1_read_value() function. If an application called the function with a NULL value for an ivalue argument to determine the amount of memory needed to store data to be read from the ASN.1 input, libtasn1 could incorrectly attempt to dereference the NULL pointer, causing an application using the library to crash.
c4e199c0ab79d1649e49098959c6c8f3c0dcefdc5a01643028b98300c6a849fbDebian Linux Security Advisory 3056-1 - Several vulnerabilities were discovered in libtasn1-3, a library that manages ASN1 (Abstract Syntax Notation One) structures. An attacker could use those to cause a denial-of-service via out-of-bounds access or NULL pointer dereference.
7a048cf39a7d9acfccb3492f25d8e0dd5367015cd8eb9a4bcf864c1326fff9a5Gentoo Linux Security Advisory 201408-9 - Multiple vulnerabilities have been discovered in GNU Libtasn1, the worse of which can allow a context-dependent attacker to cause a Denial of Service condition. Versions less than 3.6 are affected.
9eb259c7ad52db023b5746739662027753337b7e5aa8cf8018a3c533be9cfb5bUbuntu Security Notice 2294-1 - It was discovered that Libtasn1 incorrectly handled certain ASN.1 data structures. An attacker could exploit this with specially crafted ASN.1 data and cause applications using Libtasn1 to crash, resulting in a denial of service. It was discovered that Libtasn1 incorrectly handled negative bit lengths. An attacker could exploit this with specially crafted ASN.1 data and cause applications using Libtasn1 to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.
a15de4c2e04bfec1afe8e723c19c93779c39f5421110554b9e8dd54be15fa159Red Hat Security Advisory 2014-0815-01 - 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. A flaw was found in the way GnuTLS parsed session IDs from ServerHello messages of the TLS/SSL handshake. A malicious server could use this flaw to send an excessively long session ID value, which would trigger a buffer overflow in a connecting TLS/SSL client application using GnuTLS, causing the client application to crash or, possibly, execute arbitrary code.
a010735c07300e81c05307db46a722929722e51bde6e7a4c5df209d29725b131Red Hat Security Advisory 2014-0687-01 - The libtasn1 library provides Abstract Syntax Notation One parsing and structures management, and Distinguished Encoding Rules encoding and decoding functions. It was discovered that the asn1_get_bit_der() function of the libtasn1 library incorrectly reported the length of ASN.1-encoded data. Specially crafted ASN.1 input could cause an application using libtasn1 to perform an out-of-bounds access operation, causing the application to crash or, possibly, execute arbitrary code. Multiple incorrect buffer boundary check issues were discovered in libtasn1. Specially crafted ASN.1 input could cause an application using libtasn1 to crash.
822c88ae36d5215b0d611a8605c6c91e9253af0d2d6533a8933792993155a472Mandriva Linux Security Advisory 2014-107 - Multiple buffer boundary check issues were discovered in libtasn1 library, causing it to read beyond the boundary of an allocated buffer. An untrusted ASN.1 input could cause an application using the library to crash. It was discovered that libtasn1 library function asn1_get_bit_der() could incorrectly report negative bit length of the value read from ASN.1 input. This could possibly lead to an out of bounds access in an application using libtasn1, for example in case if application tried to terminate read value with NUL byte. A NULL pointer dereference flaw was found in libtasn1's asn1_read_value_type() / asn1_read_value() function. If an application called the function with a NULL value for an ivalue argument to determine the amount of memory needed to store data to be read from the ASN.1 input, libtasn1 could incorrectly attempt to dereference the NULL pointer, causing an application using the library to crash. The packages for mes5 have been patched to correct these issues and the packages for mbs1 have been upgraded to the 3.6 version where these issues has been fixed.
6084645b18303c08ddea0b6685c126bac08365a0a77c976b079a38f918704baaSlackware Security Advisory - New gnutls packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, and -current to fix security issues.
7048df4ef4b612681d06186dbc787300b6781fa7ea3008f07aee1f4b25a28b84Slackware Security Advisory - New libtasn1 packages are available for Slackware 14.0, 14.1, and -current to fix security issues.
af948750ad6da705a091b7519b18f56b895aebed42dd621fd411bb84d610378cRed Hat Security Advisory 2014-0596-01 - The libtasn1 library provides Abstract Syntax Notation One parsing and structures management, and Distinguished Encoding Rules encoding and decoding functions. It was discovered that the asn1_get_bit_der() function of the libtasn1 library incorrectly reported the length of ASN.1-encoded data. Specially crafted ASN.1 input could cause an application using libtasn1 to perform an out-of-bounds access operation, causing the application to crash or, possibly, execute arbitrary code. Multiple incorrect buffer boundary check issues were discovered in libtasn1. Specially crafted ASN.1 input could cause an application using libtasn1 to crash.
f836b4e6265be37b61ebbaeb05c7c0654914fc9b847e41d68406944ce2824ce7Red Hat Security Advisory 2014-0594-01 - The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security. The gnutls packages also include the libtasn1 library, which provides Abstract Syntax Notation One parsing and structures management, and Distinguished Encoding Rules encoding and decoding functions. A flaw was found in the way GnuTLS parsed session IDs from ServerHello messages of the TLS/SSL handshake. A malicious server could use this flaw to send an excessively long session ID value, which would trigger a buffer overflow in a connecting TLS/SSL client application using GnuTLS, causing the client application to crash or, possibly, execute arbitrary code.
5383daf04f0ecec5ab448cbfb42ba4c12d0682950ec05432c8551747b9422d50
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