CVE-2019-18634
4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
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
7.9 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
55.9%
In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.
Affected configurations
References
lists.opensuse.org/opensuse-security-announce/2020-02/msg00029.html
packetstormsecurity.com/files/156174/Slackware-Security-Advisory-sudo-Updates.html
packetstormsecurity.com/files/156189/Sudo-1.8.25p-Buffer-Overflow.html
seclists.org/fulldisclosure/2020/Jan/40
www.openwall.com/lists/oss-security/2020/01/30/6
www.openwall.com/lists/oss-security/2020/01/31/1
www.openwall.com/lists/oss-security/2020/02/05/2
www.openwall.com/lists/oss-security/2020/02/05/5
access.redhat.com/errata/RHSA-2020:0487
access.redhat.com/errata/RHSA-2020:0509
access.redhat.com/errata/RHSA-2020:0540
access.redhat.com/errata/RHSA-2020:0726
lists.debian.org/debian-lts-announce/2020/02/msg00002.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IY6DZ7WMDKU4ZDML6MJLDAPG42B5WVUC/
seclists.org/bugtraq/2020/Feb/2
seclists.org/bugtraq/2020/Feb/3
seclists.org/bugtraq/2020/Jan/44
security.gentoo.org/glsa/202003-12
security.netapp.com/advisory/ntap-20200210-0001/
support.apple.com/kb/HT210919
usn.ubuntu.com/4263-1/
usn.ubuntu.com/4263-2/
www.debian.org/security/2020/dsa-4614
www.sudo.ws/alerts/pwfeedback.html
www.sudo.ws/security.html
Related
4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
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
7.9 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
55.9%