Fady Othman discovered that Lua incorrectly handled certain scripts.
An attacker could possibly use this issue to cause a denial of service.

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.

Security fix for CVE-2019-6706.

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.

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2019-3706 advisory.

  - Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. For example, a crash outcome might be     achieved by an attacker who is able to trigger a debug.upvaluejoin call in which the arguments have     certain relationships. (CVE-2019-6706)

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

The remote Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2019:3706 advisory.

  - Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. For example, a crash outcome might be     achieved by an attacker who is able to trigger a debug.upvaluejoin call in which the arguments have     certain relationships. (CVE-2019-6706)

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

The remote CentOS Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CESA-2019:3706 advisory.

  - lua: use-after-free in lua_upvaluejoin in lapi.c resulting in denial of service (CVE-2019-6706)

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

An update of the lua package has been released.

This update for lua53 fixes the following issues :

Security issue fixed :

  - CVE-2019-6706: Fixed a use-after-free bug in the     lua_upvaluejoin function of lapi.c (bsc#1123043)

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

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

  - Lua 5.3.5 has a use-after-free in lua_upvaluejoin in     lapi.c. For example, a crash outcome might be achieved     by an attacker who is able to trigger a     debug.upvaluejoin call in which the arguments have     certain relationships.(CVE-2019-6706)

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.

According to the version of the lua packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerability :

  - Lua 5.3.5 has a use-after-free in lua_upvaluejoin in     lapi.c. For example, a crash outcome might be achieved     by an attacker who is able to trigger a     debug.upvaluejoin call in which the arguments have     certain relationships.(CVE-2019-6706)

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.

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2019:3706 advisory.

  - Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. For example, a crash outcome might be     achieved by an attacker who is able to trigger a debug.upvaluejoin call in which the arguments have     certain relationships. (CVE-2019-6706)

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

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3469 advisory.

  - Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. For example, a crash outcome might be     achieved by an attacker who is able to trigger a debug.upvaluejoin call in which the arguments have     certain relationships. (CVE-2019-6706)

  - ldebug.c in Lua 5.4.0 allows a negation overflow and segmentation fault in getlocal and setlocal, as     demonstrated by getlocal(3,2^31). (CVE-2020-24370)

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

This update for lua53 fixes the following issues :

Security issue fixed :

CVE-2019-6706: Fixed a use-after-free bug in the lua_upvaluejoin function of lapi.c (bsc#1123043)

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.

An update for lua is now available for Red Hat Enterprise Linux 8.

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 lua packages provide support for Lua, a powerful light-weight programming language designed for extending applications. Lua is also frequently used as a general-purpose, stand-alone language.

Security Fix(es) :

* lua: use-after-free in lua_upvaluejoin in lapi.c resulting in denial of service (CVE-2019-6706)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, 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 8.1 Release Notes linked from the References section.

ID	Name	Product	Family	Published	Updated	Severity
123933	Ubuntu 16.04 LTS / 18.04 LTS : Lua vulnerability (USN-3941-1)	Nessus	Ubuntu Local Security Checks	4/9/2019	10/20/2023	high
121446	Fedora 29 : lua (2019-ee57bda7ae)	Nessus	Fedora Local Security Checks	1/30/2019	9/23/2019	high
180664	Oracle Linux 8 : lua (ELSA-2019-3706)	Nessus	Oracle Linux Local Security Checks	9/7/2023	9/7/2023	high
184484	Rocky Linux 8 : lua (RLSA-2019:3706)	Nessus	Rocky Linux Local Security Checks	11/6/2023	11/6/2023	high
145605	CentOS 8 : lua (CESA-2019:3706)	Nessus	CentOS Local Security Checks	1/29/2021	3/23/2021	high
148816	Photon OS 4.0: Lua PHSA-2021-4.0-0009	Nessus	PhotonOS Local Security Checks	4/20/2021	4/21/2021	high
122222	openSUSE Security Update : lua53 (openSUSE-2019-175)	Nessus	SuSE Local Security Checks	2/15/2019	1/19/2021	high
127013	EulerOS 2.0 SP8 : lua (EulerOS-SA-2019-1776)	Nessus	Huawei Local Security Checks	7/25/2019	1/6/2021	high
131504	EulerOS Virtualization for ARM 64 3.0.3.0 : lua (EulerOS-SA-2019-2339)	Nessus	Huawei Local Security Checks	12/3/2019	4/8/2024	high
157534	AlmaLinux 8 : lua (ALSA-2019:3706)	Nessus	Alma Linux Local Security Checks	2/9/2022	2/14/2022	high
177553	Debian DLA-3469-1 : lua5.3 - LTS security update	Nessus	Debian Local Security Checks	6/23/2023	6/23/2023	high
121617	SUSE SLED15 / SLES15 Security Update : lua53 (SUSE-SU-2019:0247-1)	Nessus	SuSE Local Security Checks	2/6/2019	9/10/2019	high
130573	RHEL 8 : lua (RHSA-2019:3706)	Nessus	Red Hat Local Security Checks	11/6/2019	4/15/2024	high

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