CVE-2021-46705

grub2-once uses fixed file name in /var/tmp

Severity Score

4.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A Insecure Temporary File vulnerability in grub-once of grub2 in SUSE Linux Enterprise Server 15 SP4, openSUSE Factory allows local attackers to truncate arbitrary files. This issue affects: SUSE Linux Enterprise Server 15 SP4 grub2 versions prior to 2.06-150400.7.1. SUSE openSUSE Factory grub2 versions prior to 2.06-18.1.

Una vulnerabilidad de Archivos Temporales no Seguros en grub-once de grub2 en SUSE Linux Enterprise Server 15 SP4, openSUSE Factory permite a atacantes locales truncar archivos arbitrarios. Este problema afecta a: SUSE Linux Enterprise Server 15 SP4 grub2 versiones anteriores a 2.06-150400.7.1. SUSE openSUSE Factory grub2 versiones anteriores a 2.06-18.1

*Credits: Ludwig Nussel of SUSE

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-03-09 CVE Reserved
2022-03-16 CVE Published
2023-03-08 EPSS Updated
2024-09-16 CVE Updated
2024-09-16 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-377: Insecure Temporary File

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC
https://bugzilla.suse.com/show_bug.cgi?id=1190474	2024-09-16

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Gnu Search vendor "Gnu"	Grub2 Search vendor "Gnu" for product "Grub2"	< 2.06-150400.7.1 Search vendor "Gnu" for product "Grub2" and version " < 2.06-150400.7.1"	-	Affected	in	Suse Search vendor "Suse"	Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"	15 Search vendor "Suse" for product "Linux Enterprise Server" and version "15"	sp4	Safe
Gnu Search vendor "Gnu"	Grub2 Search vendor "Gnu" for product "Grub2"	< 2.06-18.1 Search vendor "Gnu" for product "Grub2" and version " < 2.06-18.1"	-	Affected	in	Opensuse Search vendor "Opensuse"	Factory Search vendor "Opensuse" for product "Factory"	-	-	Safe