Security Fix(es) :

  - gnutls: HMAC-SHA-256 vulnerable to Lucky thirteen attack     due to not enough dummy function calls (CVE-2018-10844)

  - gnutls: HMAC-SHA-384 vulnerable to Lucky thirteen attack     due to use of wrong constant (CVE-2018-10845)

  - gnutls: 'Just in Time' PRIME + PROBE cache-based side     channel attack can lead to plaintext recovery     (CVE-2018-10846)

It was found that GnuTLS's implementation of HMAC-SHA-256 was vulnerable to Lucky Thirteen-style attack. A remote attacker could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.(CVE-2018-10844)

It was found that GnuTLS's implementation of HMAC-SHA-384 was vulnerable to a Lucky Thirteen-style attack. A remote attacker could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.(CVE-2018-10845)

A cache-based side channel attack was found in the way GnuTLS implements CBC-mode cipher suites. An attacker could use a combination of 'Just in Time' Prime+probe and Lucky-13 attacks to recover plain text in a cross-VM attack scenario.(CVE-2018-10846)

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

  - A cache-based side channel attack was found in the way     GnuTLS implements CBC-mode cipher suites. An attacker     could use a combination of 'Just in Time' Prime+probe     and Lucky-13 attacks to recover plain text in a     cross-VM attack scenario.(CVE-2018-10846)

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.

This update for gnutls fixes the following security issues :

  - Improved mitigations against Lucky 13 class of attacks

  - CVE-2018-10846: 'Just in Time' PRIME + PROBE cache-based     side channel attack can lead to plaintext recovery     (bsc#1105460)

  - CVE-2018-10845: HMAC-SHA-384 vulnerable to Lucky     thirteen attack due to use of wrong constant     (bsc#1105459)

  - CVE-2018-10844: HMAC-SHA-256 vulnerable to Lucky     thirteen attack due to not enough dummy function calls     (bsc#1105437)

  - CVE-2017-10790: The _asn1_check_identifier function in     Libtasn1 caused a NULL pointer dereference and crash     (bsc#1047002)

This update was imported from the SUSE:SLE-15:Update update project.

This update for gnutls fixes the following issues :

This update for gnutls fixes the following issues :

Security issues fixed :

Improved mitigations against Lucky 13 class of attacks

'Just in Time' PRIME + PROBE cache-based side channel attack can lead to plaintext recovery (CVE-2018-10846, bsc#1105460)

HMAC-SHA-384 vulnerable to Lucky thirteen attack due to use of wrong constant (CVE-2018-10845, bsc#1105459)

HMAC-SHA-256 vulnerable to Lucky thirteen attack due to not enough dummy function calls (CVE-2018-10844, bsc#1105437)

The _asn1_check_identifier function in Libtasn1 caused a NULL pointer dereference and crash (CVE-2017-10790, bsc#1047002)

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 security issues :

Improved mitigations against Lucky 13 class of attacks

CVE-2018-10846: 'Just in Time' PRIME + PROBE cache-based side channel attack can lead to plaintext recovery (bsc#1105460)

CVE-2018-10845: HMAC-SHA-384 vulnerable to Lucky thirteen attack due to use of wrong constant (bsc#1105459)

CVE-2018-10844: HMAC-SHA-256 vulnerable to Lucky thirteen attack due to not enough dummy function calls (bsc#1105437)

CVE-2017-10790: The _asn1_check_identifier function in Libtasn1 caused a NULL pointer dereference and crash (bsc#1047002)

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.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2018-3050 advisory.

    - Improved counter-measures in TLS CBC record padding for lucky13 attack       (CVE-2018-10844, #1589704, CVE-2018-10845, #1589707)
    - Added counter-measures for 'Just in Time' PRIME + PROBE cache-based attack       (CVE-2018-10846, #1589708)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

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

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 (3.3.29). (BZ#1561481)

Security Fix(es) :

* gnutls: HMAC-SHA-256 vulnerable to Lucky thirteen attack due to not enough dummy function calls (CVE-2018-10844)

* gnutls: HMAC-SHA-384 vulnerable to Lucky thirteen attack due to use of wrong constant (CVE-2018-10845)

* gnutls: 'Just in Time' PRIME + PROBE cache-based side channel attack can lead to plaintext recovery (CVE-2018-10846)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.6 Release Notes linked from the References section.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
119184	Scientific Linux Security Update : gnutls on SL7.x x86_64 (20181030)	Nessus	Scientific Linux Local Security Checks	2018/11/27	2024/7/18	medium
119503	Amazon Linux 2 : gnutls (ALAS-2018-1120)	Nessus	Amazon Linux Local Security Checks	2018/12/10	2024/7/16	medium
129209	EulerOS 2.0 SP3 : gnutls (EulerOS-SA-2019-2016)	Nessus	Huawei Local Security Checks	2019/9/24	2024/4/23	medium
117897	openSUSE Security Update : gnutls (openSUSE-2018-1092)	Nessus	SuSE Local Security Checks	2018/10/3	2024/8/1	medium
118292	SUSE SLES12 Security Update : gnutls (SUSE-SU-2018:2825-2)	Nessus	SuSE Local Security Checks	2018/10/22	2024/7/30	medium
120112	SUSE SLED15 / SLES15 Security Update : gnutls (SUSE-SU-2018:2930-1)	Nessus	SuSE Local Security Checks	2019/1/2	2024/7/10	medium
123319	openSUSE Security Update : gnutls (openSUSE-2019-746)	Nessus	SuSE Local Security Checks	2019/3/27	2024/6/10	medium
118764	Oracle Linux 7 : gnutls (ELSA-2018-3050)	Nessus	Oracle Linux Local Security Checks	2018/11/7	2024/11/1	medium
119690	CentOS 7 : gnutls (CESA-2018:3050)	Nessus	CentOS Local Security Checks	2018/12/17	2024/7/16	medium

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