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ubuntucveUbuntu.comUB:CVE-2021-3156
HistoryJan 26, 2021 - 12:00 a.m.

CVE-2021-3156

2021-01-2600:00:00
ubuntu.com
ubuntu.com
41
sudo
buffer overflow
privilege escalation
cve-2021-3156
unix

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.958

Percentile

99.5%

JSON

Sudo before 1.9.5p2 contains an off-by-one error that can result in a
heap-based buffer overflow, which allows privilege escalation to root via
“sudoedit -s” and a command-line argument that ends with a single backslash
character.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchsudo< 1.8.21p2-3ubuntu1.4UNKNOWN
ubuntu20.04noarchsudo< 1.8.31-1ubuntu1.2UNKNOWN
ubuntu20.10noarchsudo< 1.9.1-1ubuntu1.1UNKNOWN
ubuntu14.04noarchsudo< 1.8.9p5-1ubuntu1.5+esm6UNKNOWN
ubuntu16.04noarchsudo< 1.8.16-0ubuntu1.10UNKNOWN

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CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.958

Percentile

99.5%

JSON
Related for UB:CVE-2021-3156
githubexploit53cisco1alpinelinux1osv4openvas21redhat10oraclelinux4nessus43virtuozzo2cisa1cert1rapid7blog2paloalto1ics6almalinux1f51metasploit1centos1ubuntu1packetstorm4avleonov1zdt4ibm1altlinux2redos4photon2qualysblog2debian3amazon2threatpost2checkpoint_security1redhatcve1mageia1huawei1veracode1fedora2cloudlinux1suse1cisa_kev1nvd1cve1freebsd1slackware1debiancve1prion1cvelist1