The _gnutls_ecc_ansi_x963_export function in gnutls_ecc.c in GnuTLS 3.x before 3.1.28, 3.2.x before 3.2.20, and 3.3.x before 3.3.10 allows remote attackers to cause a denial of service (out-of-bounds write) via a crafted (1) Elliptic Curve Cryptography (ECC) certificate or (2) certificate signing requests (CSR), related to generating key IDs.

gnutls was updated to fix one security issue.

  - Fixed parsing problem in elliptic curve blobs over TLS     that could lead to remote crashes (CVE-2014-8564).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Updated gnutls packages fix security vulnerabilities :

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 (something that deviates from the documented behavior) (CVE-2014-1959).

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 (CVE-2014-0092).

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 (CVE-2014-3465).

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 (CVE-2014-3466).

An out-of-bounds memory write flaw was found in the way GnuTLS parsed certain ECC (Elliptic Curve Cryptography) certificates or certificate signing requests (CSR). 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 (CVE-2014-8564).

gnutls was updated to fix one security issue. &#9; This security issue was fixed :

  - Parsing problem in elliptic curve blobs over TLS that     could lead to remote crashes (CVE-2014-8564).

Updated gnutls package fix security vulnerability :

An out-of-bounds memory write flaw was found in the way GnuTLS parsed certain ECC (Elliptic Curve Cryptography) certificates or certificate signing requests (CSR). 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 (CVE-2014-8564).

new upstream release, Security fix for CVE-2014-8564

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Security fix for CVE-2014-8564

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

An out-of-bounds memory write flaw was found in the way GnuTLS parsed certain ECC (Elliptic Curve Cryptography) certificates or certificate signing requests (CSR). 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.
(CVE-2014-8564)

For the update to take effect, all applications linked to the GnuTLS or libtasn1 library must be restarted.

From Red Hat Security Advisory 2014:1846 :

Updated gnutls packages that fix one security issue are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security (TLS). The gnutls packages also include the libtasn1 library, which provides Abstract Syntax Notation One (ASN.1) parsing and structures management, and Distinguished Encoding Rules (DER) encoding and decoding functions.

An out-of-bounds memory write flaw was found in the way GnuTLS parsed certain ECC (Elliptic Curve Cryptography) certificates or certificate signing requests (CSR). 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.
(CVE-2014-8564)

Red Hat would like to thank GnuTLS upstream for reporting this issue.
Upstream acknowledges Sean Burford as the original reporter.

All gnutls users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. For the update to take effect, all applications linked to the GnuTLS or libtasn1 library must be restarted.

Updated gnutls packages that fix one security issue are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security (TLS). The gnutls packages also include the libtasn1 library, which provides Abstract Syntax Notation One (ASN.1) parsing and structures management, and Distinguished Encoding Rules (DER) encoding and decoding functions.

An out-of-bounds memory write flaw was found in the way GnuTLS parsed certain ECC (Elliptic Curve Cryptography) certificates or certificate signing requests (CSR). 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.
(CVE-2014-8564)

Red Hat would like to thank GnuTLS upstream for reporting this issue.
Upstream acknowledges Sean Burford as the original reporter.

All gnutls users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. For the update to take effect, all applications linked to the GnuTLS or libtasn1 library must be restarted.

Sean Burford discovered that GnuTLS incorrectly handled printing certain elliptic curve parameters. A malicious remote server or client could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
83650	SUSE SLED12 / SLES12 Security Update : gnutls (SUSE-SU-2014:1628-1)	Nessus	SuSE Local Security Checks	medium
82325	Mandriva Linux Security Advisory : gnutls (MDVSA-2015:072)	Nessus	Mandriva Local Security Checks	medium
79413	openSUSE Security Update : gnutls (openSUSE-SU-2014:1472-1)	Nessus	SuSE Local Security Checks	medium
79347	Mandriva Linux Security Advisory : gnutls (MDVSA-2014:215)	Nessus	Mandriva Local Security Checks	medium
79262	Fedora 21 : gnutls-3.3.10-1.fc21 (2014-14734)	Nessus	Fedora Local Security Checks	medium
79240	Fedora 20 : gnutls-3.1.28-1.fc20 (2014-14760)	Nessus	Fedora Local Security Checks	medium
79231	Scientific Linux Security Update : gnutls on SL7.x x86_64 (20141112)	Nessus	Scientific Linux Local Security Checks	medium
79227	Oracle Linux 7 : gnutls (ELSA-2014-1846)	Nessus	Oracle Linux Local Security Checks	medium
79220	CentOS 7 : gnutls (CESA-2014:1846)	Nessus	CentOS Local Security Checks	medium
79209	Ubuntu 14.10 : gnutls28 vulnerability (USN-2403-1)	Nessus	Ubuntu Local Security Checks	medium
79207	RHEL 7 : gnutls (RHSA-2014:1846)	Nessus	Red Hat Local Security Checks	medium

Detections

Analytics

CVE-2014-8564

high

Tenable Plugins

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium