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CVE-2019-18634 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00029.html	CVE
http://packetstormsecurity.com/files/156174/Slackware-Security-Advisory-sudo-Updates.html	CVE	Third Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/156189/Sudo-1.8.25p-Buffer-Overflow.html	CVE	Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2020:0487	CVE
https://access.redhat.com/errata/RHSA-2020:0509	CVE
https://access.redhat.com/errata/RHSA-2020:0540	CVE
https://access.redhat.com/errata/RHSA-2020:0726	CVE
http://seclists.org/fulldisclosure/2020/Jan/40	CVE	Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/02/msg00002.html	CVE	Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/	CVE
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IY6DZ7WMDKU4ZDML6MJLDAPG42B5WVUC/	CVE
https://seclists.org/bugtraq/2020/Feb/2	CVE	Mailing ListThird Party Advisory
https://seclists.org/bugtraq/2020/Feb/3	CVE	Mailing ListThird Party Advisory
https://seclists.org/bugtraq/2020/Jan/44	CVE	Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202003-12	CVE
https://security.netapp.com/advisory/ntap-20200210-0001/	CVE
https://support.apple.com/kb/HT210919	CVE	Third Party Advisory
https://usn.ubuntu.com/4263-1/	CVE
https://usn.ubuntu.com/4263-2/	CVE
https://www.debian.org/security/2020/dsa-4614	CVE	Third Party Advisory
https://www.sudo.ws/alerts/pwfeedback.html	CVE	ExploitVendor Advisory
https://www.sudo.ws/security.html	CVE	Vendor Advisory
http://www.openwall.com/lists/oss-security/2020/01/30/6	CVE	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2020/01/31/1	CVE	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2020/02/05/2	CVE	Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/02/05/5	CVE	ExploitThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00029.html	[email protected]
http://packetstormsecurity.com/files/156174/Slackware-Security-Advisory-sudo-Updates.html	[email protected]	Third Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/156189/Sudo-1.8.25p-Buffer-Overflow.html	[email protected]	Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2020:0487	[email protected]
https://access.redhat.com/errata/RHSA-2020:0509	[email protected]
https://access.redhat.com/errata/RHSA-2020:0540	[email protected]
https://access.redhat.com/errata/RHSA-2020:0726	[email protected]
http://seclists.org/fulldisclosure/2020/Jan/40	[email protected]	Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/02/msg00002.html	[email protected]	Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/	[email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IY6DZ7WMDKU4ZDML6MJLDAPG42B5WVUC/	[email protected]
https://seclists.org/bugtraq/2020/Feb/2	[email protected]	Mailing ListThird Party Advisory
https://seclists.org/bugtraq/2020/Feb/3	[email protected]	Mailing ListThird Party Advisory
https://seclists.org/bugtraq/2020/Jan/44	[email protected]	Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202003-12	[email protected]
https://security.netapp.com/advisory/ntap-20200210-0001/	[email protected]
https://support.apple.com/kb/HT210919	[email protected]	Third Party Advisory
https://usn.ubuntu.com/4263-1/	[email protected]
https://usn.ubuntu.com/4263-2/	[email protected]
https://www.debian.org/security/2020/dsa-4614	[email protected]	Third Party Advisory
https://www.sudo.ws/alerts/pwfeedback.html	[email protected]	ExploitVendor Advisory
https://www.sudo.ws/security.html	[email protected]	Vendor Advisory
http://www.openwall.com/lists/oss-security/2020/01/30/6	[email protected]	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2020/01/31/1	[email protected]	Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2020/02/05/2	[email protected]	Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/02/05/5	[email protected]	ExploitThird Party Advisory

see all 52 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	[email protected]

Affected Products

Product	Versions
sudo project sudo	>= 1.7.1, < 1.8.26
CPE cpe:2.3:a:sudo_project:sudo:::::::: Remediation No remediation found in references.
debian debian linux	8.0 9.0 10.0
CPE cpe:2.3:o:debian:debian_linux:8.0:::::::* cpe:2.3:o:debian:debian_linux:9.0:::::::* cpe:2.3:o:debian:debian_linux:10.0:::::::* Remediation No remediation found in references.

Change History

28 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Nov 7, 2023	CVE Modified	[email protected]
Mar 17, 2020	CVE Modified	[email protected]
Mar 14, 2020	CVE Modified	[email protected]
Mar 11, 2020	CVE Modified	[email protected]
Mar 6, 2020	CVE Modified	[email protected]
Feb 25, 2020	CVE Modified	[email protected]
Feb 18, 2020	CVE Modified	[email protected]
Feb 13, 2020	CVE Modified	[email protected]
Feb 13, 2020	CVE Modified	[email protected]
Feb 11, 2020	CVE Modified	[email protected]
Feb 10, 2020	CVE Modified	[email protected]
Feb 7, 2020	CVE Modified	[email protected]
Feb 6, 2020	Initial Analysis	[email protected]
Feb 6, 2020	CVE Modified	[email protected]
Feb 5, 2020	CVE Modified	[email protected]
Feb 4, 2020	CVE Modified	[email protected]
Feb 3, 2020	CVE Modified	[email protected]
Feb 3, 2020	CVE Modified	[email protected]
Feb 2, 2020	CVE Modified	[email protected]
Feb 1, 2020	CVE Modified	[email protected]
Feb 1, 2020	CVE Modified	[email protected]
Jan 31, 2020	CVE Modified	[email protected]
Jan 31, 2020	CVE Modified	[email protected]
Jan 31, 2020	CVE Modified	[email protected]
Jan 30, 2020	CVE Modified	[email protected]