CVE-2019-18634

Published: Jan 29, 2020Modified: Jun 17, 2026

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: NVD

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.

Affected (4)

Products: Sudo Project: Sudo · Debian: Debian Linux

1 product

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Sudo Project Sudo	From 1.7.1 to 1.8.26

Configuration B

3 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 10.0
Debian Debian Linux	Version 8.0
Debian Debian Linux	Version 9.0

Related CWEs

CWE-787

Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

References (52)

http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00029.html

Source: cve@mitre.org

http://packetstormsecurity.com/files/156174/Slackware-Security-Advisory-sudo-Updates.html

Source: cve@mitre.org

Third Party AdvisoryVDB Entry

http://packetstormsecurity.com/files/156189/Sudo-1.8.25p-Buffer-Overflow.html

Source: cve@mitre.org

Third Party AdvisoryVDB Entry

http://seclists.org/fulldisclosure/2020/Jan/40

Source: cve@mitre.org

Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2020/01/30/6

Source: cve@mitre.org

Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2020/01/31/1

Source: cve@mitre.org

Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2020/02/05/2

Source: cve@mitre.org

Third Party Advisory

http://www.openwall.com/lists/oss-security/2020/02/05/5

Source: cve@mitre.org

ExploitThird Party Advisory

https://access.redhat.com/errata/RHSA-2020:0487

Source: cve@mitre.org

https://access.redhat.com/errata/RHSA-2020:0509

Source: cve@mitre.org

https://access.redhat.com/errata/RHSA-2020:0540

Source: cve@mitre.org

https://access.redhat.com/errata/RHSA-2020:0726

Source: cve@mitre.org

https://lists.debian.org/debian-lts-announce/2020/02/msg00002.html

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IY6DZ7WMDKU4ZDML6MJLDAPG42B5WVUC/

Source: cve@mitre.org

https://seclists.org/bugtraq/2020/Feb/2

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://seclists.org/bugtraq/2020/Feb/3

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://seclists.org/bugtraq/2020/Jan/44

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://security.gentoo.org/glsa/202003-12

Source: cve@mitre.org

https://security.netapp.com/advisory/ntap-20200210-0001/

Source: cve@mitre.org

https://support.apple.com/kb/HT210919

Source: cve@mitre.org

Third Party Advisory

https://usn.ubuntu.com/4263-1/

Source: cve@mitre.org

https://usn.ubuntu.com/4263-2/

Source: cve@mitre.org

https://www.debian.org/security/2020/dsa-4614

Source: cve@mitre.org

Third Party Advisory

https://www.sudo.ws/alerts/pwfeedback.html

Source: cve@mitre.org

ExploitVendor Advisory

https://www.sudo.ws/security.html

Source: cve@mitre.org

Vendor Advisory

http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00029.html