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Mend.io Vulnerability Database

CVE-2019-18634

Date: January 29, 2020

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.

Language: C

Severity Score

7.8

Related Resources (32)

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

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

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

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

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

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

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

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2019-18634

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

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

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

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

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

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

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

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

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

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

Url: https://access.redhat.com/security/cve/CVE-2019-18634

Url: https://nvd.nist.gov/vuln/detail/CVE-2019-18634

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

Url: https://security-tracker.debian.org/tracker/CVE-2019-18634

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

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

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

Url: https://security.alpinelinux.org/vuln/CVE-2019-18634

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

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

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

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

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

Url: https://www.mend.io/vulnerability-database/CVE-2019-18634

Severity Score

7.8

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

CVSS v3.1

Base Score:	7.8
Attack Vector (AV):	LOCAL
Attack Complexity (AC):	LOW
Privileges Required (PR):	LOW
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	HIGH
Integrity (I):	HIGH
Availability (A):	HIGH

CVSS v2

Base Score:	4.6
Access Vector (AV):	LOCAL
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	PARTIAL
Integrity (I):	PARTIAL
Availability (A):	PARTIAL
Additional information:

Mend.io Vulnerability Database

We found results for “”

CVE-2019-18634

Date: January 29, 2020

Language: C

Severity Score

Related Resources (32)

Severity Score

Weakness Type (CWE)

CVSS v3.1

CVSS v2

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