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Debian LTS Advisory DLA-3469-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                       Guilhem Moulin
June 23, 2023                                 https://wiki.debian.org/LTS
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Package        : lua5.3
Version        : 5.3.3-1.1+deb10u1
CVE ID         : CVE-2019-6706 CVE-2020-24370
Debian Bug     : 920321 988734

Issues were found in lua5.3, a powerful, light-weight programming
language designed for extending applications, which may result in denial
of service.

CVE-2019-6706

    Fady Osman discovered a heap-user-after-free vulnerability in
    lua_upvaluejoin() in lapi.c, which might result in denial of service
    upon calling debug.upvaluejoin() with specific arguments.

CVE-2020-24370

    Yongheng Chen discovered a negation overflow and segmentation fault
    issue in getlocal() and setlocal(), as demonstrated by getlocal(3,2^31).

For Debian 10 buster, these problems have been fixed in version
5.3.3-1.1+deb10u1.

We recommend that you upgrade your lua5.3 packages.

For the detailed security status of lua5.3 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/lua5.3

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS