PRIOn knowledge basePRION:CVE-2021-3156Heap overflow
7.8 High
CVSS3
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
8.1 High
AI Score
Confidence
High
7.2 High
CVSS2
Access Vector
LOCAL
Access 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
0.971 High
EPSS
Percentile
99.8%
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
packetstormsecurity.com/files/161160/Sudo-Heap-Based-Buffer-Overflow.html
packetstormsecurity.com/files/161230/Sudo-Buffer-Overflow-Privilege-Escalation.html
packetstormsecurity.com/files/161270/Sudo-1.9.5p1-Buffer-Overflow-Privilege-Escalation.html
packetstormsecurity.com/files/161293/Sudo-1.8.31p2-1.9.5p1-Buffer-Overflow.html
packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html
seclists.org/fulldisclosure/2021/Feb/42
seclists.org/fulldisclosure/2021/Jan/79
seclists.org/fulldisclosure/2024/Feb/3
www.openwall.com/lists/oss-security/2021/01/26/3
www.openwall.com/lists/oss-security/2021/01/27/1
www.openwall.com/lists/oss-security/2021/01/27/2
www.openwall.com/lists/oss-security/2021/02/15/1
www.openwall.com/lists/oss-security/2021/09/14/2
www.openwall.com/lists/oss-security/2024/01/30/6
www.openwall.com/lists/oss-security/2024/01/30/8
kc.mcafee.com/corporate/index?page=content&id=SB10348
lists.debian.org/debian-lts-announce/2021/01/msg00022.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CALA5FTXIQBRRYUA2ZQNJXB6OQMAXEII/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LHXK6ICO5AYLGFK2TAX5MZKUXTUKWOJY/
security.gentoo.org/glsa/202101-33
security.netapp.com/advisory/ntap-20210128-0001/
security.netapp.com/advisory/ntap-20210128-0002/
support.apple.com/kb/HT212177
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM
www.beyondtrust.com/blog/entry/security-advisory-privilege-management-for-unix-linux-pmul-basic-and-privilege-management-for-mac-pmm-affected-by-sudo-vulnerability
www.debian.org/security/2021/dsa-4839
www.kb.cert.org/vuls/id/794544
www.openwall.com/lists/oss-security/2021/01/26/3
www.oracle.com//security-alerts/cpujul2021.html
www.oracle.com/security-alerts/cpuapr2022.html
www.oracle.com/security-alerts/cpuoct2021.html
www.sudo.ws/stable.html
www.synology.com/security/advisory/Synology_SA_21_02
Related
7.8 High
CVSS3
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
8.1 High
AI Score
Confidence
High
7.2 High
CVSS2
Access Vector
LOCAL
Access 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
0.971 High
EPSS
Percentile
99.8%