Multiple heap-based buffer overflows in the read_attribute function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allow remote attackers to have unspecified impact via a crafted OpenPGP certificate.

The remote NewStart CGSL host, running version MAIN 4.05, has gnutls packages installed that are affected by multiple vulnerabilities:

  - Stack-based buffer overflow in the cdk_pk_get_keyid     function in lib/opencdk/pubkey.c in GnuTLS before 3.3.26     and 3.5.x before 3.5.8 allows remote attackers to have     unspecified impact via a crafted OpenPGP certificate.
    (CVE-2017-5336)

  - The stream reading functions in lib/opencdk/read-     packet.c in GnuTLS before 3.3.26 and 3.5.x before 3.5.8     allow remote attackers to cause a denial of service     (out-of-memory error and crash) via a crafted OpenPGP     certificate. (CVE-2017-5335)

  - Multiple heap-based buffer overflows in the     read_attribute function in GnuTLS before 3.3.26 and     3.5.x before 3.5.8 allow remote attackers to have     unspecified impact via a crafted OpenPGP certificate.
    (CVE-2017-5337)

  - A denial of service flaw was found in the way the     TLS/SSL protocol defined processing of ALERT packets     during a connection handshake. A remote attacker could     use this flaw to make a TLS/SSL server consume an     excessive amount of CPU and fail to accept connections     from other clients. (CVE-2016-8610)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the gnutls packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A double-free flaw was found in the way GnuTLS parsed     certain X.509 certificates with Proxy Certificate     Information extension. An attacker could create a     specially-crafted certificate which, when processed by     an application compiled against GnuTLS, could cause     that application to crash. (CVE-2017-5334)

  - Multiple flaws were found in the way gnutls processed     OpenPGP certificates. An attacker could create     specially crafted OpenPGP certificates which, when     parsed by gnutls, would cause it to crash.
    (CVE-2017-5335, CVE-2017-5336, CVE-2017-5337,     CVE-2017-7869)

  - A null pointer dereference flaw was found in the way     GnuTLS processed ClientHello messages with     status_request extension. A remote attacker could use     this flaw to cause an application compiled with GnuTLS     to crash. (CVE-2017-7507)

  - A flaw was found in the way GnuTLS validated     certificates using OCSP responses. This could falsely     report a certificate as valid under certain     circumstances. (CVE-2016-7444)

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

An update for gnutls is now available for Red Hat Enterprise Linux 7.

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

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

The following packages have been upgraded to a later upstream version:
gnutls (3.3.26). (BZ#1378373)

Security Fix(es) :

* A double-free flaw was found in the way GnuTLS parsed certain X.509 certificates with Proxy Certificate Information extension. An attacker could create a specially crafted certificate which, when processed by an application compiled against GnuTLS, could cause that application to crash. (CVE-2017-5334)

* Multiple flaws were found in the way gnutls processed OpenPGP certificates. An attacker could create specially crafted OpenPGP certificates which, when parsed by gnutls, would cause it to crash.
(CVE-2017-5335, CVE-2017-5336, CVE-2017-5337, CVE-2017-7869)

* A NULL pointer dereference flaw was found in the way GnuTLS processed ClientHello messages with status_request extension. A remote attacker could use this flaw to cause an application compiled with GnuTLS to crash. (CVE-2017-7507)

* A flaw was found in the way GnuTLS validated certificates using OCSP responses. This could falsely report a certificate as valid under certain circumstances. (CVE-2016-7444)

The CVE-2017-7507 issue was discovered by Hubert Kario (Red Hat QE BaseOS Security team).

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section.

The following packages have been upgraded to a later upstream version:
gnutls (3.3.26).

Security Fix(es) :

  - A double-free flaw was found in the way GnuTLS parsed     certain X.509 certificates with Proxy Certificate     Information extension. An attacker could create a     specially crafted certificate which, when processed by     an application compiled against GnuTLS, could cause that     application to crash. (CVE-2017-5334)

  - Multiple flaws were found in the way gnutls processed     OpenPGP certificates. An attacker could create specially     crafted OpenPGP certificates which, when parsed by     gnutls, would cause it to crash. (CVE-2017-5335,     CVE-2017-5336, CVE-2017-5337, CVE-2017-7869)

  - A NULL pointer dereference flaw was found in the way     GnuTLS processed ClientHello messages with     status_request extension. A remote attacker could use     this flaw to cause an application compiled with GnuTLS     to crash. (CVE-2017-7507)

  - A flaw was found in the way GnuTLS validated     certificates using OCSP responses. This could falsely     report a certificate as valid under certain     circumstances. (CVE-2016-7444)

From Red Hat Security Advisory 2017:2292 :

An update for gnutls is now available for Red Hat Enterprise Linux 7.

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

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

The following packages have been upgraded to a later upstream version:
gnutls (3.3.26). (BZ#1378373)

Security Fix(es) :

* A double-free flaw was found in the way GnuTLS parsed certain X.509 certificates with Proxy Certificate Information extension. An attacker could create a specially crafted certificate which, when processed by an application compiled against GnuTLS, could cause that application to crash. (CVE-2017-5334)

* Multiple flaws were found in the way gnutls processed OpenPGP certificates. An attacker could create specially crafted OpenPGP certificates which, when parsed by gnutls, would cause it to crash.
(CVE-2017-5335, CVE-2017-5336, CVE-2017-5337, CVE-2017-7869)

* A NULL pointer dereference flaw was found in the way GnuTLS processed ClientHello messages with status_request extension. A remote attacker could use this flaw to cause an application compiled with GnuTLS to crash. (CVE-2017-7507)

* A flaw was found in the way GnuTLS validated certificates using OCSP responses. This could falsely report a certificate as valid under certain circumstances. (CVE-2016-7444)

The CVE-2017-7507 issue was discovered by Hubert Kario (Red Hat QE BaseOS Security team).

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section.

A denial of service flaw was found in the way the TLS/SSL protocol defined

processing of ALERT packets during a connection handshake. A remote attacker

could use this flaw to make a TLS/SSL server consume an excessive amount of CPU

and fail to accept connections form other clients. (CVE-2016-8610)

Multiple flaws were found in the way gnutls processed OpenPGP certificates. An

attacker could create specially crafted OpenPGP certificates which, when parsed

by gnutls, would cause it to crash. (CVE-2017-5335 , CVE-2017-5336 ,

CVE-2017-5337)

The following packages have been upgraded to a later upstream version:
gnutls (2.12.23).

Security Fix(es) :

  - A denial of service flaw was found in the way the     TLS/SSL protocol defined processing of ALERT packets     during a connection handshake. A remote attacker could     use this flaw to make a TLS/SSL server consume an     excessive amount of CPU and fail to accept connections     form other clients. (CVE-2016-8610)

  - Multiple flaws were found in the way gnutls processed     OpenPGP certificates. An attacker could create specially     crafted OpenPGP certificates which, when parsed by     gnutls, would cause it to crash. (CVE-2017-5335,     CVE-2017-5336, CVE-2017-5337)

The remote OracleVM system is missing necessary patches to address critical security updates :

  - Upgraded to 2.12.23 to incorporate multiple TLS 1.2     fixes (#1326389, #1326073, #1323215, #1320982, #1328205,     #1321112)

  - Modified gnutls-serv to accept --sni-hostname (#1333521)

  - Modified gnutls-serv to always reply with an alert     message (#1327656)

  - Removed support for DSA2 as it causes interoperability     issues (#1321112)

  - Allow sending and receiving certificates which were not     in the signature algorithms extension (#1328205)

  - Removed support for EXPORT ciphersuites (#1337460)

  - Raised the minimum acceptable DH size to 1024 (#1335924)

  - Restricted the number of alert that can be received     during handshake (#1388730)

  - Added fixes for OpenPGP parsing issues (CVE-2017-5337,     CVE-2017-5336, CVE-2017-5335)

  - The exposed (but internal) crypto back-end registration     API is deprecated and no longer functional. The ABI is     kept compatible (#1415682)

From Red Hat Security Advisory 2017:0574 :

An update for gnutls is now available for Red Hat Enterprise Linux 6.

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

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

The following packages have been upgraded to a later upstream version:
gnutls (2.12.23). (BZ#1321112, BZ#1326073, BZ#1415682, BZ#1326389)

Security Fix(es) :

* A denial of service flaw was found in the way the TLS/SSL protocol defined processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make a TLS/SSL server consume an excessive amount of CPU and fail to accept connections form other clients. (CVE-2016-8610)

* Multiple flaws were found in the way gnutls processed OpenPGP certificates. An attacker could create specially crafted OpenPGP certificates which, when parsed by gnutls, would cause it to crash.
(CVE-2017-5335, CVE-2017-5336, CVE-2017-5337)

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9 Technical Notes linked from the References section.

An update for gnutls is now available for Red Hat Enterprise Linux 6.

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

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.

The following packages have been upgraded to a later upstream version:
gnutls (2.12.23). (BZ#1321112, BZ#1326073, BZ#1415682, BZ#1326389)

Security Fix(es) :

* A denial of service flaw was found in the way the TLS/SSL protocol defined processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make a TLS/SSL server consume an excessive amount of CPU and fail to accept connections form other clients. (CVE-2016-8610)

* Multiple flaws were found in the way gnutls processed OpenPGP certificates. An attacker could create specially crafted OpenPGP certificates which, when parsed by gnutls, would cause it to crash.
(CVE-2017-5335, CVE-2017-5336, CVE-2017-5337)

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9 Technical Notes linked from the References section.

The remote host is affected by the vulnerability described in GLSA-201702-04 (GnuTLS: Multiple vulnerabilities)

    Multiple heap and stack overflows and double free vulnerabilities have       been discovered in GnuTLS by the OSS-Fuzz project. Please review the CVE       identifiers referenced below for details.
  Impact :

    A remote attacker could entice a user or automated system to process a       specially crafted certificate using an application linked against GnuTLS.
      This could possibly result in the execution of arbitrary code with the       privileges of the process or a Denial of Service condition.
  Workaround :

    There is no known workaround at this time.

This update for gnutls fixes the following security issues :

  - GnuTLS could have crashed when processing maliciously     crafted OpenPGP certificates (GNUTLS-SA-2017-2,     bsc#1018832, CVE-2017-5335, CVE-2017-5337,     CVE-2017-5336)

  - GnuTLS could have falsely accepted certificates when     using OCSP (GNUTLS-SA-2016-3, bsc#999646, CVE-2016-7444)

  - GnuTLS could have suffered from 100% CPU load DoS     attacks by using SSL alert packets during the handshake     (bsc#1005879, CVE-2016-8610)

This update was imported from the SUSE:SLE-12:Update update project.

Stefan Buehler discovered that GnuTLS incorrectly verified the serial length of OCSP responses. A remote attacker could possibly use this issue to bypass certain certificate validation measures. This issue only applied to Ubuntu 16.04 LTS. (CVE-2016-7444)

Shi Lei discovered that GnuTLS incorrectly handled certain warning alerts. A remote attacker could possibly use this issue to cause GnuTLS to hang, resulting in a denial of service. This issue has only been addressed in Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-8610)

It was discovered that GnuTLS incorrectly decoded X.509 certificates with a Proxy Certificate Information extension. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2017-5334)

It was discovered that GnuTLS incorrectly handled certain OpenPGP certificates. A remote attacker could possibly use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-5335, CVE-2017-5336, CVE-2017-5337).

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.

This update for gnutls fixes the following security issues :

  - GnuTLS could have crashed when processing maliciously     crafted OpenPGP certificates (GNUTLS-SA-2017-2,     bsc#1018832, CVE-2017-5335, CVE-2017-5337,     CVE-2017-5336)

  - GnuTLS could have falsely accepted certificates when     using OCSP (GNUTLS-SA-2016-3, bsc#999646, CVE-2016-7444)

  - GnuTLS could have suffered from 100% CPU load DoS     attacks by using SSL alert packets during the handshake     (bsc#1005879, CVE-2016-8610)

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.

This update for gnutls fixes the following issues :

  - Malformed asn1 definitions could cause a segmentation     fault in the asn1 definition parser (bsc#961491).

  - CVE-2016-8610: Remote denial of service in SSL alert     handling (bsc#1005879).

  - CVE-2017-5335: Decoding a specially crafted OpenPGP     certificate could have lead to heap and stack overflows     (bsc#1018832).

  - CVE-2017-5336: Decoding a specially crafted OpenPGP     certificate could have lead to heap and stack overflows     (bsc#1018832).

  - CVE-2017-5337: Decoding a specially crafted OpenPGP     certificate could have lead to heap and stack overflows     (bsc#1018832).

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.

Security fix for CVE-2017-5337, CVE-2017-5334, CVE-2017-5336, CVE-2017-5335

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

New gnutls packages are available for Slackware 14.0, 14.1, 14.2, and
-current to fix security issues.

ID	Name	Product	Family	Severity
127344	NewStart CGSL MAIN 4.05 : gnutls Multiple Vulnerabilities (NS-SA-2019-0109)	Nessus	NewStart CGSL Local Security Checks	critical
103062	EulerOS 2.0 SP2 : gnutls (EulerOS-SA-2017-1204)	Nessus	Huawei Local Security Checks	critical
103061	EulerOS 2.0 SP1 : gnutls (EulerOS-SA-2017-1203)	Nessus	Huawei Local Security Checks	critical
102759	CentOS 7 : gnutls (CESA-2017:2292)	Nessus	CentOS Local Security Checks	critical
102642	Scientific Linux Security Update : gnutls on SL7.x x86_64 (20170801)	Nessus	Scientific Linux Local Security Checks	critical
102303	Oracle Linux 7 : gnutls (ELSA-2017-2292)	Nessus	Oracle Linux Local Security Checks	critical
102116	RHEL 7 : gnutls (RHSA-2017:2292)	Nessus	Red Hat Local Security Checks	critical
99419	Amazon Linux AMI : gnutls (ALAS-2017-815)	Nessus	Amazon Linux Local Security Checks	critical
99217	Scientific Linux Security Update : gnutls on SL6.x i386/x86_64 (20170321)	Nessus	Scientific Linux Local Security Checks	critical
99081	OracleVM 3.3 / 3.4 : gnutls (OVMSA-2017-0054)	Nessus	OracleVM Local Security Checks	critical
99063	Oracle Linux 6 : gnutls (ELSA-2017-0574)	Nessus	Oracle Linux Local Security Checks	critical
97951	CentOS 6 : gnutls (CESA-2017:0574)	Nessus	CentOS Local Security Checks	high
97874	RHEL 6 : gnutls (RHSA-2017:0574)	Nessus	Red Hat Local Security Checks	critical
97110	GLSA-201702-04 : GnuTLS: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical
97004	openSUSE Security Update : gnutls (openSUSE-2017-207)	Nessus	SuSE Local Security Checks	critical
96952	Ubuntu 14.04 LTS / 16.04 LTS : GnuTLS vulnerabilities (USN-3183-1)	Nessus	Ubuntu Local Security Checks	critical
96950	SUSE SLED12 / SLES12 Security Update : gnutls (SUSE-SU-2017:0348-1)	Nessus	SuSE Local Security Checks	critical
96870	SUSE SLES11 Security Update : gnutls (SUSE-SU-2017:0304-1)	Nessus	SuSE Local Security Checks	critical
96507	Fedora 24 : gnutls (2017-e86817c42e)	Nessus	Fedora Local Security Checks	critical
96408	Slackware 14.0 / 14.1 / 14.2 / current : gnutls (SSA:2017-011-02)	Nessus	Slackware Local Security Checks	critical

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CVE-2017-5337

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