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Test ID:1.3.6.1.4.1.25623.1.1.2.2020.2196
Category:Huawei EulerOS Local Security Checks
Title:Huawei EulerOS: Security Advisory for sudo (EulerOS-SA-2020-2196)
Summary:The remote host is missing an update for the Huawei EulerOS; 'sudo' package(s) announced via the EulerOS-SA-2020-2196 advisory.
Description:Summary:
The remote host is missing an update for the Huawei EulerOS
'sudo' package(s) announced via the EulerOS-SA-2020-2196 advisory.

Vulnerability Insight:
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.(CVE-2019-18634)

In Sudo through 1.8.29, an attacker with access to a Runas ALL sudoer account can impersonate a nonexistent user by invoking sudo with a numeric uid that is not associated with any user.(CVE-2019-19232)

In Sudo through 1.8.29, the fact that a user has been blocked (e.g., by using the ! character in the shadow file instead of a password hash) is not considered, allowing an attacker (who has access to a Runas ALL sudoer account) to impersonate any blocked user.(CVE-2019-19234)

Affected Software/OS:
'sudo' package(s) on Huawei EulerOS Virtualization 3.0.2.2.

Solution:
Please install the updated package(s).

CVSS Score:
5.0

CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:P/A:N

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2019-18634
Common Vulnerability Exposure (CVE) ID: CVE-2019-19232
Common Vulnerability Exposure (CVE) ID: CVE-2019-19234
CopyrightCopyright (C) 2020 Greenbone Networks GmbH

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