CVE-2021-3156 Information

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.

CVSS Vector

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

Reference

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/package-announce@lists.fedoraproject.org/message/LHXK6ICO5AYLGFK2TAX5MZKUXTUKWOJY/ https://www.debian.org/security/2021/dsa-4839 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/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

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8