CVE-2019-18634
Scores
EPSS
Percentile: 87.5%
CVSS
CVSS Score: 7.8/10
All CVSS Scores
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Local (L)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Privileges Required
Low (L)
Describes the level of privileges an attacker must possess
User Interaction
None (N)
Captures the requirement for a human user participation
Scope
Unchanged (U)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
High (H)
Measures the impact to the confidentiality of information
Integrity Impact
High (H)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
High (H)
Measures the impact to the availability of the impacted component
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Local (L)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Authentication
None (N)
Describes the level of privileges an attacker must possess
Confidentiality Impact
Partial
Measures the impact to the confidentiality of information
Integrity Impact
Partial
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
Partial
Measures the impact to the availability of the impacted component
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.
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Sources
CWEs
Related Vulnerabilities
Exploits
Exploit ID: CVE-2019-18634
Source: github-poc
Vulnerable Software (15)
Type: Configuration
Product: sudo
Operating System: altlinux
{ "fixed": "1:1.8.26-alt1"}
Source: redhat
Type: Configuration
Product: sudo
Operating System: debian
{ "fixed": "1.8.31-1"}
Source: debian
Type: Configuration
Product: sudo
Operating System: debian buster 10
{ "fixed": "1.8.27-1+deb10u2"}
Source: debian
Type: Configuration
Product: sudo
Operating System: astra 1.6.5
{ "unaffected": true}
Source: astra
Type: Configuration
Product: sudo
Operating System: ubuntu bionic 18.04
{ "fixed": "1.8.21p2-3ubuntu1.2"}
Source: ubuntu
Type: Configuration
Product: sudo
Operating System: ubuntu eoan 19.10
{ "fixed": "1.8.27-1ubuntu4.1"}
Source: ubuntu
Type: Configuration
Product: sudo
Operating System: ubuntu trusty 14.04
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: sudo
Operating System: ubuntu xenial 16.04
{ "fixed": "1.8.16-0ubuntu1.9"}
Source: ubuntu
Type: Configuration
Product: sudo
Operating System: rhel 6
{ "fixed": "1.8.6p3-29.el6_10.3"}
Source: redhat
Type: Configuration
Product: sudo
Operating System: rhel 7
{ "fixed": "1.8.23-4.el7_7.2"}
Source: redhat
Type: Configuration
Product: sudo
Operating System: rhel 8
{ "fixed": "1.8.25p1-8.el8_1.1"}
Source: redhat
Type: Configuration
Product: sudo
Operating System: rhel 8.0
{ "fixed": "1.8.25p1-4.el8_0.3"}
Source: redhat
Type: Configuration
Product: sudo-devel
Operating System: altlinux
{ "fixed": "1:1.8.26-alt1"}
Source: redhat
Type: Configuration
Vendor: *
Product: debian_linux
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": "OR"}
Source: nvd
Type: Configuration
Vendor: *
Product: sudo
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:sudo_project:sudo:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.8.26", "versionStartIncluding": "1.7.1", "vulnerable": true }...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:sudo_project:sudo:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.8.26", "versionStartIncluding": "1.7.1", "vulnerable": true } ], "operator": "OR"}
Source: nvd