CVE-2019-6706 Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c.
High 7.5
Published
Updated
Check this codebase for CVE-2019-6706 and fix it if it is affected.
What it is: CVE-2019-6706 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 23 Jan 2019.
Exploitation: There is no known exploitation of CVE-2019-6706 in the wild and no public exploit code.
Affected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2019-6706/ (Markdown: https://insights.sbomify.com/CVE-2019-6706/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2019-6706?
CVE-2019-6706 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 23 Jan 2019.
Official description
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.
Weakness: CWE-416
Which versions are affected by CVE-2019-6706?
It affects 2 products.
Linux distribution packages (19)
lua AlmaLinux:8 | All versions | 5.3.4-11.el8 |
lua-devel AlmaLinux:8 | All versions | 5.3.4-11.el8 |
lua Red Hat:enterprise_linux:8::appstream | All versions | 0:5.3.4-11.el8 |
lua-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:5.3.4-11.el8 |
lua-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:5.3.4-11.el8 |
lua-libs-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:5.3.4-11.el8 |
lua Red Hat:enterprise_linux:8::baseos | All versions | 0:5.3.4-11.el8 |
lua-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:5.3.4-11.el8 |
lua-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:5.3.4-11.el8 |
lua-libs Red Hat:enterprise_linux:8::baseos | All versions | 0:5.3.4-11.el8 |
lua-libs-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:5.3.4-11.el8 |
lua Red Hat:enterprise_linux:8::crb | All versions | 0:5.3.4-11.el8 |
lua-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:5.3.4-11.el8 |
lua-debugsource Red Hat:enterprise_linux:8::crb | All versions | 0:5.3.4-11.el8 |
lua-devel Red Hat:enterprise_linux:8::crb | All versions | 0:5.3.4-11.el8 |
lua-libs-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:5.3.4-11.el8 |
lua Rocky Linux:8 | All versions | 0:5.3.4-11.el8 |
lua53 SUSE:Linux Enterprise Module for Basesystem 15 | All versions | 5.3.4-3.3.2 |
lua53 openSUSE:Leap 15.0 | All versions | 5.3.4-lp150.2.3.1 |
Products include Canonical Ubuntu Linux, Lua Lua.
How do I fix CVE-2019-6706?
Upgrade to a fixed version.
Is CVE-2019-6706 being exploited?
There is no known exploitation of CVE-2019-6706 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as ALPINE-CVE-2019-6706, ALSA-2019:3706, AZL-6669, DEBIAN-CVE-2019-6706, GHSA-f6gj-vrmg-ccf7, JLSEC-2026-553 and 6 more.