7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
5.2%
Debian LTS Advisory DLA-2596-1 [email protected]
https://www.debian.org/lts/security/ Sylvain Beucler
March 17, 2021 https://wiki.debian.org/LTS
Package : shadow
Version : 1:4.4-4.1+deb9u1
CVE ID : CVE-2017-12424 CVE-2017-20002
Debian Bug : 756630 914957
Several vulnerabilities were discovered in the shadow suite of login
tools. An attacker may escalate privileges in specific configurations.
CVE-2017-20002
Shadow incorrectly lists pts/0 and pts/1 as physical terminals in
/etc/securetty. This allows local users to login as password-less
users even if they are connected by non-physical means such as SSH
(hence bypassing PAM's nullok_secure configuration). This notably
affects environments such as virtual machines automatically
generated with a default blank root password, allowing all local
users to escalate privileges. It should be noted however that
/etc/securetty will be dropped in Debian 11/bullseye.
CVE-2017-12424
The newusers tool could be made to manipulate internal data
structures in ways unintended by the authors. Malformed input may
lead to crashes (with a buffer overflow or other memory
corruption) or other unspecified behaviors. This crosses a
privilege boundary in, for example, certain web-hosting
environments in which a Control Panel allows an unprivileged user
account to create subaccounts.
For Debian 9 stretch, these problems have been fixed in version
1:4.4-4.1+deb9u1.
We recommend that you upgrade your shadow packages.
For the detailed security status of shadow please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/shadow
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 9 | i386 | uidmap | < 1:4.4-4.1+deb9u1 | uidmap_1:4.4-4.1+deb9u1_i386.deb |
Debian | 9 | armhf | login | < 1:4.4-4.1+deb9u1 | login_1:4.4-4.1+deb9u1_armhf.deb |
Debian | 9 | amd64 | passwd | < 1:4.4-4.1+deb9u1 | passwd_1:4.4-4.1+deb9u1_amd64.deb |
Debian | 9 | all | shadow | < 1:4.4-4.1+deb9u1 | shadow_1:4.4-4.1+deb9u1_all.deb |
Debian | 9 | amd64 | login | < 1:4.4-4.1+deb9u1 | login_1:4.4-4.1+deb9u1_amd64.deb |
Debian | 9 | armhf | passwd | < 1:4.4-4.1+deb9u1 | passwd_1:4.4-4.1+deb9u1_armhf.deb |
Debian | 9 | i386 | login | < 1:4.4-4.1+deb9u1 | login_1:4.4-4.1+deb9u1_i386.deb |
Debian | 9 | armel | uidmap | < 1:4.4-4.1+deb9u1 | uidmap_1:4.4-4.1+deb9u1_armel.deb |
Debian | 9 | arm64 | passwd | < 1:4.4-4.1+deb9u1 | passwd_1:4.4-4.1+deb9u1_arm64.deb |
Debian | 9 | armhf | uidmap | < 1:4.4-4.1+deb9u1 | uidmap_1:4.4-4.1+deb9u1_armhf.deb |
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
5.2%