Off-by-one Error Affecting sudo package, versions <1.8.9p5-1ubuntu1.5+esm6
Snyk CVSS
Attack Complexity
Low
Confidentiality
High
Integrity
High
Availability
High
Threat Intelligence
Exploit Maturity
Mature
EPSS
97.05% (100th
percentile)
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Test your applications- Snyk ID SNYK-UBUNTU1404-SUDO-1065770
- published 27 Jan 2021
- disclosed 26 Jan 2021
Introduced: 26 Jan 2021
CVE-2021-3156 Open this link in a new tabHow to fix?
Upgrade Ubuntu:14.04 sudo to version 1.8.9p5-1ubuntu1.5+esm6 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream sudo package and not the sudo package as distributed by Ubuntu.
See How to fix? for Ubuntu:14.04 relevant fixed versions and status.
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
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2021-3156
- https://www.kb.cert.org/vuls/id/794544
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM
- https://kc.mcafee.com/corporate/index?page=content&id=SB10348
- https://security.netapp.com/advisory/ntap-20210128-0001/
- https://security.netapp.com/advisory/ntap-20210128-0002/
- https://support.apple.com/kb/HT212177
- https://www.sudo.ws/stable.html#1.9.5p2
- https://www.synology.com/security/advisory/Synology_SA_21_02
- https://www.debian.org/security/2021/dsa-4839
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CALA5FTXIQBRRYUA2ZQNJXB6OQMAXEII/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LHXK6ICO5AYLGFK2TAX5MZKUXTUKWOJY/
- http://seclists.org/fulldisclosure/2021/Feb/42
- http://seclists.org/fulldisclosure/2021/Jan/79
- https://security.gentoo.org/glsa/202101-33
- http://packetstormsecurity.com/files/161160/Sudo-Heap-Based-Buffer-Overflow.html
- 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
- http://packetstormsecurity.com/files/161293/Sudo-1.8.31p2-1.9.5p1-Buffer-Overflow.html
- 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.openwall.com/lists/oss-security/2021/01/26/3
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://lists.debian.org/debian-lts-announce/2021/01/msg00022.html
- http://www.openwall.com/lists/oss-security/2021/01/26/3
- http://www.openwall.com/lists/oss-security/2021/01/27/1
- http://www.openwall.com/lists/oss-security/2021/01/27/2
- http://www.openwall.com/lists/oss-security/2021/02/15/1
- http://www.openwall.com/lists/oss-security/2021/09/14/2
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CALA5FTXIQBRRYUA2ZQNJXB6OQMAXEII/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LHXK6ICO5AYLGFK2TAX5MZKUXTUKWOJY/
- http://www.openwall.com/lists/oss-security/2024/01/30/6
- http://www.openwall.com/lists/oss-security/2024/01/30/8
- http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html
- http://seclists.org/fulldisclosure/2024/Feb/3
- https://www.exploit-db.com/exploits/49522
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- https://github.com/projectdiscovery/nuclei-templates/blob/master/code/cves/2021/CVE-2021-3156.yaml