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 is fixed in 5 products on 1 platform, first by liblua5.3-0 5.3.3-1ubuntu0.18.04.1, released January 22, 2019. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| liblua5.3-0 · Ubuntu 18.04.6 LTS (bionic) | 5.3.3-1ubuntu0.18.04.1 | liblua5.3-0 5.3.3-1ubuntu0.18.04.1 | Jan 22, 2019 |
| lua · RHEL 8 | 0:5.3.4-11.el8 | RHSA-2019:3706 | Nov 5, 2019 |
| lua · ol 8 | 0:5.3.4-11.el8 | ELSA-2019-3706 | Nov 14, 2019 |
| lua-devel · RHEL 8 | 0:5.3.4-11.el8 | RHSA-2019:3706 | Nov 5, 2019 |
| lua-devel · ol 8 | 0:5.3.4-11.el8 | ELSA-2019-3706 | Nov 14, 2019 |
| lua-libs · RHEL 8 | 0:5.3.4-11.el8 | RHSA-2019:3706 | Nov 5, 2019 |
| lua-libs · ol 8 | 0:5.3.4-11.el8 | ELSA-2019-3706 | Nov 14, 2019 |
| lua5.3 · Ubuntu 18.04.6 LTS (bionic) | 5.3.3-1ubuntu0.18.04.1 | lua5.3 5.3.3-1ubuntu0.18.04.1 | Jan 22, 2019 |
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