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Ubuntu.comUB:CVE-2020-15889

HistoryJul 21, 2020 - 12:00 a.m.

CVE-2020-15889

2020-07-2100:00:00

ubuntu.com

lua 5.4.0

getobjname

heap-based buffer over-read

youngcollection

lgc.c

markold

insufficient number

list members

cve-2020-15889

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.004

Percentile

72.4%

JSON

Lua 5.4.0 has a getobjname heap-based buffer over-read because
youngcollection in lgc.c uses markold for an insufficient number of list
members.

Notes

Author	Note
leosilva	bug was introduced in commit f5f3df3bd17fb3489bbd26ab39fe1580a8dbf9c9 which was merged in Lua 5.4

References

lua-users.org/lists/lua-l/2020-07/msg00078.html

github.com/lua/lua/commit/127e7a6c8942b362aa3c6627f44d660a4fb75312

launchpad.net/bugs/cve/CVE-2020-15889

nvd.nist.gov/vuln/detail/CVE-2020-15889

security-tracker.debian.org/tracker/CVE-2020-15889

www.cve.org/CVERecord?id=CVE-2020-15889

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.004

Percentile

72.4%

JSON

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