Use After Free Affecting lua package, versions <0:5.3.4-11.el8


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    2.98% (91st percentile)

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  • Snyk ID SNYK-RHEL8-LUA-3928425
  • published 26 Jul 2021
  • disclosed 10 Jan 2019

How to fix?

Upgrade RHEL:8 lua to version 0:5.3.4-11.el8 or higher.
This issue was patched in RHSA-2019:3706.

NVD Description

Note: Versions mentioned in the description apply only to the upstream lua package and not the lua package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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.

CVSS Scores

version 3.1
Expand this section

NVD

7.5 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High