CVEvulnerability
CVE-2019-18634
7.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-01-29
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 4.6 MEDIUM — AV:L/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-787
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 configurations
• sudo project sudo (>= 1.7.1 < 1.8.26)
• debian debian linux 8.0
• debian debian linux 9.0
• debian debian linux 10.0
Related
Weakness · CWE (1)
- CWE-787 Out-of-bounds Write weakness
References
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00029.html lists.opensuse.org
- http://packetstormsecurity.com/files/156174/Slackware-Security-Advisory-sudo-Updates.html Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/156189/Sudo-1.8.25p-Buffer-Overflow.html Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2020/Jan/40 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/30/6 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/31/1 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/02/05/2 Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/02/05/5 Exploit, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0487 access.redhat.com
- https://access.redhat.com/errata/RHSA-2020:0509 access.redhat.com
- https://access.redhat.com/errata/RHSA-2020:0540 access.redhat.com
- https://access.redhat.com/errata/RHSA-2020:0726 access.redhat.com
- https://lists.debian.org/debian-lts-announce/2020/02/msg00002.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IY6DZ7WMDKU4ZDML6MJLDAPG42B5WVUC/ lists.fedoraproject.org
- https://seclists.org/bugtraq/2020/Feb/2 Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2020/Feb/3 Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2020/Jan/44 Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202003-12 security.gentoo.org
- https://security.netapp.com/advisory/ntap-20200210-0001/ security.netapp.com
- https://support.apple.com/kb/HT210919 Third Party Advisory
- https://usn.ubuntu.com/4263-1/ usn.ubuntu.com
- https://usn.ubuntu.com/4263-2/ usn.ubuntu.com
- https://www.debian.org/security/2020/dsa-4614 Third Party Advisory
- https://www.sudo.ws/alerts/pwfeedback.html Exploit, Vendor Advisory
- https://www.sudo.ws/security.html Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00029.html lists.opensuse.org
- http://packetstormsecurity.com/files/156174/Slackware-Security-Advisory-sudo-Updates.html Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/156189/Sudo-1.8.25p-Buffer-Overflow.html Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2020/Jan/40 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/30/6 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/01/31/1 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/02/05/2 Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/02/05/5 Exploit, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0487 access.redhat.com
- https://access.redhat.com/errata/RHSA-2020:0509 access.redhat.com
- https://access.redhat.com/errata/RHSA-2020:0540 access.redhat.com
- https://access.redhat.com/errata/RHSA-2020:0726 access.redhat.com
- https://lists.debian.org/debian-lts-announce/2020/02/msg00002.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IY6DZ7WMDKU4ZDML6MJLDAPG42B5WVUC/ lists.fedoraproject.org
- https://seclists.org/bugtraq/2020/Feb/2 Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2020/Feb/3 Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2020/Jan/44 Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202003-12 security.gentoo.org
- https://security.netapp.com/advisory/ntap-20200210-0001/ security.netapp.com
- https://support.apple.com/kb/HT210919 Third Party Advisory
- https://usn.ubuntu.com/4263-1/ usn.ubuntu.com
- https://usn.ubuntu.com/4263-2/ usn.ubuntu.com
- https://www.debian.org/security/2020/dsa-4614 Third Party Advisory
- https://www.sudo.ws/alerts/pwfeedback.html Exploit, Vendor Advisory
- https://www.sudo.ws/security.html Vendor Advisory