GnuTLS before 2017-02-20 has an out-of-bounds write caused by an integer overflow and heap-based buffer overflow related to the cdk_pkt_read function in opencdk/read-packet.c. This issue (which is a subset of the vendor's GNUTLS-SA-2017-3 report) is fixed in 3.5.10.

An update of the gnutls package has been released.

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.

This update for gnutls fixes the following issues :

  - GNUTLS-SA-2017-3 / CVE-2017-7869: An out-of-bounds write     in OpenPGP certificate decoding was fixed (bsc#1034173)

  - CVE-2017-6891: A potential stack-based buffer overflow     in the bundled libtasn1 was fixed (bsc#1040621)

  - An address read of 4 bytes past the end of buffer in     OpenPGP certificate parsing was fixed (bsc#1038337)

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 :

  - GNUTLS-SA-2017-4 / CVE-2017-7507: Fix crash in status     response TLS extension decoding (bsc#1043398)

  - GNUTLS-SA-2017-3 / CVE-2017-7869: Fix out-of-bounds     write in OpenPGP certificate decoding (bsc#1034173)

  - Address read of 4 bytes past the end of buffer in     OpenPGP certificate parsing (bsc#1038337)

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

This update for gnutls fixes the following issues :

  - GNUTLS-SA-2017-4 / CVE-2017-7507: Fix crash in status     response TLS extension decoding (bsc#1043398)

  - GNUTLS-SA-2017-3 / CVE-2017-7869: Fix out-of-bounds     write in OpenPGP certificate decoding (bsc#1034173)

  - Address read of 4 bytes past the end of buffer in     OpenPGP certificate parsing (bsc#1038337)

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.

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

  - GnuTLS before 2017-02-20 has an out-of-bounds write     caused by an integer overflow and heap-based buffer     overflow related to the cdk_pkt_read function in     opencdk/read-packet.c. This issue (which is a subset of     the vendor's GNUTLS-SA-2017-3 report) is fixed in     3.5.10.i1/4^CVE-2017-7869i1/4%0

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.

Hubert Kario discovered that GnuTLS incorrectly handled decoding a status response TLS extension. A remote attacker could possibly use this issue to cause GnuTLS to crash, resulting in a denial of service.
This issue only applied to Ubuntu 16.04 LTS, Ubuntu 16.10 and Ubuntu 17.04. (CVE-2017-7507)

It was discovered that GnuTLS incorrectly handled decoding certain OpenPGP certificates. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-7869).

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.

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

  - GnuTLS before 2017-02-20 has an out-of-bounds write     caused by an integer overflow and heap-based buffer     overflow related to the cdk_pkt_read function in     opencdk/read-packet.c. This issue (which is a subset of     the vendor's GNUTLS-SA-2017-3 report) is fixed in     3.5.10.(CVE-2017-7869)

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.

ID	Name	Product	Family	Severity
121691	Photon OS 1.0: Gnutls PHSA-2017-0016	Nessus	PhotonOS Local Security Checks	high
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
101768	SUSE SLES11 Security Update : gnutls (SUSE-SU-2017:1886-1)	Nessus	SuSE Local Security Checks	high
101759	openSUSE Security Update : gnutls (openSUSE-2017-824)	Nessus	SuSE Local Security Checks	high
101393	SUSE SLED12 / SLES12 Security Update : gnutls (SUSE-SU-2017:1838-1)	Nessus	SuSE Local Security Checks	high
101306	EulerOS 2.0 SP1 : gnutls (EulerOS-SA-2017-1115)	Nessus	Huawei Local Security Checks	high
100781	Ubuntu 14.04 LTS / 16.04 LTS : GnuTLS vulnerabilities (USN-3318-1)	Nessus	Ubuntu Local Security Checks	high
100722	EulerOS 2.0 SP2 : gnutls (EulerOS-SA-2017-1111)	Nessus	Huawei Local Security Checks	high

Detections

Analytics

CVE-2017-7869

high

Tenable Plugins

high

critical

critical

critical

critical

high

high

high

high

high

high