Vulnerability Name:

CVE-2020-24342 (CCN-186819)

Assigned:2020-07-18
Published:2020-07-18
Updated:2021-01-26
Summary:Lua through 5.4.0 allows a stack redzone cross in luaO_pushvfstring because a protection mechanism wrongly calls luaD_callnoyield twice in a row.
CVSS v3 Severity:7.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.0 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.0 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
6.8 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-119
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2020-24342

Source: MISC
Type: Exploit, Mailing List, Vendor Advisory
http://lua-users.org/lists/lua-l/2020-07/msg00052.html

Source: XF
Type: UNKNOWN
lua-cve202024342-bo(186819)

Source: CCN
Type: lua GIT repository
Fixed bug: "luaD_callnoyield" called twice in a row

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/lua/lua/commit/34affe7a63fc5d842580a9f23616d057e17dfe27

Source: FEDORA
Type: Third Party Advisory
FEDORA-2020-38e35de8aa

Vulnerable Configuration:Configuration 1:
  • cpe:/a:lua:lua:5.4.0:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:lua:lua:5.4.0:-:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:112675
    P
    		liblua5_4-5-32bit-5.4.3-4.2 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:106155
    P
    		liblua5_4-5-32bit-5.4.3-4.2 on GA media (Moderate)
    2021-10-01
    BACK
    lua lua 5.4.0
    fedoraproject fedora 33
    lua lua 5.4.0 -