CVE-2021-3156
- Source
- https://cve.org/CVERecord?id=CVE-2021-3156
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3156.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-3156
- Downstream
- Related
- Published
- 2021-01-26T21:15:12.987Z
- Modified
- 2026-03-15T22:37:17.381573Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3156
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM
- 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.kb.cert.org/vuls/id/794544
- https://www.sudo.ws/stable.html#1.9.5p2
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CALA5FTXIQBRRYUA2ZQNJXB6OQMAXEII/
- https://security.netapp.com/advisory/ntap-20210128-0001/
- http://seclists.org/fulldisclosure/2021/Feb/42
- http://www.openwall.com/lists/oss-security/2021/01/27/2
- http://www.openwall.com/lists/oss-security/2021/01/27/1
- https://security.gentoo.org/glsa/202101-33
- https://www.synology.com/security/advisory/Synology_SA_21_02
- https://kc.mcafee.com/corporate/index?page=content&id=SB10348
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LHXK6ICO5AYLGFK2TAX5MZKUXTUKWOJY/
- https://security.netapp.com/advisory/ntap-20210128-0002/
- https://support.apple.com/kb/HT212177
- https://www.debian.org/security/2021/dsa-4839
- https://lists.debian.org/debian-lts-announce/2021/01/msg00022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- 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
- http://www.openwall.com/lists/oss-security/2024/01/30/8
- https://www.vicarius.io/vsociety/posts/sudoedit-pwned-cve-2021-3156
- http://www.openwall.com/lists/oss-security/2021/01/26/3
- http://packetstormsecurity.com/files/161160/Sudo-Heap-Based-Buffer-Overflow.html
- http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html
- http://packetstormsecurity.com/files/161230/Sudo-Buffer-Overflow-Privilege-Escalation.html
- http://seclists.org/fulldisclosure/2024/Feb/3
- http://packetstormsecurity.com/files/161270/Sudo-1.9.5p1-Buffer-Overflow-Privilege-Escalation.html
- http://seclists.org/fulldisclosure/2021/Jan/79
- http://www.openwall.com/lists/oss-security/2021/02/15/1
- https://www.openwall.com/lists/oss-security/2021/01/26/3
- http://packetstormsecurity.com/files/161293/Sudo-1.8.31p2-1.9.5p1-Buffer-Overflow.html
- http://www.openwall.com/lists/oss-security/2024/01/30/6
Affected packages
Git / github.com/millert/sudo
Affected ranges
- Type
- GIT
- Repo
- https://github.com/millert/sudo
- Events
-
IntroducedFixedIntroducedFixedIntroduced0 Unknown introduced commit / All previous commits are affectedLast affectedIntroduced0 Unknown introduced commit / All previous commits are affectedLast affected
- Database specific
{ "versions": [ { "introduced": "1.8.2" }, { "fixed": "1.8.32" }, { "introduced": "1.9.0" }, { "fixed": "1.9.5" }, { "introduced": "0" }, { "last_affected": "1.9.5-NA" }, { "introduced": "0" }, { "last_affected": "1.9.5-patch1" } ] }
Database specific
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3156.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "32"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "33"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "9.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "10.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "9"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "8.2.17"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "9.2.8"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "10.0.4"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "3.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "6.2"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "21.1.1"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "10.3.2-10"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "310"
}
]
},
{
"events": [
{
"introduced": "400"
},
{
"last_affected": "410"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "210"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5a"
}
]
},
{
"events": [
{
"introduced": "610"
},
{
"last_affected": "655"
}
]
},
{
"events": [
{
"introduced": "10.3.0.0.0"
},
{
"last_affected": "10.3.0.2.1"
}
]
},
{
"events": [
{
"introduced": "10.4.0.1.0"
},
{
"last_affected": "10.4.0.3.1"
}
]
},
{
"events": [
{
"introduced": "7.4.0"
},
{
"last_affected": "7.7.1"
}
]
}
]