CVE-2021-3156

high

Description

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.

References

https://www.openwall.com/lists/oss-security/2021/01/26/3

https://www.sudo.ws/stable.html#1.9.5p2

http://www.openwall.com/lists/oss-security/2021/01/26/3

https://security.gentoo.org/glsa/202101-33

https://lists.fedoraproject.org/archives/list/[email protected]/message/LHXK6ICO5AYLGFK2TAX5MZKUXTUKWOJY/

https://www.debian.org/security/2021/dsa-4839

https://lists.fedoraproject.org/archives/list/[email protected]/message/CALA5FTXIQBRRYUA2ZQNJXB6OQMAXEII/

http://www.openwall.com/lists/oss-security/2021/01/27/1

http://www.openwall.com/lists/oss-security/2021/01/27/2

http://packetstormsecurity.com/files/161160/Sudo-Heap-Based-Buffer-Overflow.html

https://security.netapp.com/advisory/ntap-20210128-0001/

https://security.netapp.com/advisory/ntap-20210128-0002/

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM

http://packetstormsecurity.com/files/161230/Sudo-Buffer-Overflow-Privilege-Escalation.html

http://packetstormsecurity.com/files/161270/Sudo-1.9.5p1-Buffer-Overflow-Privilege-Escalation.html

https://www.kb.cert.org/vuls/id/794544

http://packetstormsecurity.com/files/161293/Sudo-1.8.31p2-1.9.5p1-Buffer-Overflow.html

https://support.apple.com/kb/HT212177

http://seclists.org/fulldisclosure/2021/Feb/42

https://kc.mcafee.com/corporate/index?page=content&id=SB10348

http://www.openwall.com/lists/oss-security/2021/02/15/1

https://lists.debian.org/debian-lts-announce/2021/01/msg00022.html

http://seclists.org/fulldisclosure/2021/Jan/79

https://www.beyondtrust.com/blog/entry/security-advisory-privilege-management-for-unix-linux-pmul-basic-and-privilege-management-for-mac-pmm-affected-by-sudo-vulnerability

https://www.synology.com/security/advisory/Synology_SA_21_02

https://www.oracle.com//security-alerts/cpujul2021.html

http://www.openwall.com/lists/oss-security/2021/09/14/2

https://www.oracle.com/security-alerts/cpuoct2021.html

https://www.oracle.com/security-alerts/cpuapr2022.html

Details

Source: MITRE

Published: 2021-01-26

Updated: 2022-09-03

Type: CWE-193

Risk Information

CVSS v2

Base Score: 7.2

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

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3

Base Score: 7.8

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

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH