CVE-2021-35942
Scores
EPSS
Percentile: 1.6%
CVSS
CVSS Score: 9.1/10
All CVSS Scores
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Privileges Required
None (N)
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
None (N)
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:N/AC:L/Au:N/C:P/I:N/A:P
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
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
None (N)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
Partial
Measures the impact to the availability of the impacted component
Description
The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash or read arbitrary memory in parse_param (in posix/wordexp.c) when called with an untrusted, crafted pattern, potentially resulting in a denial of service or disclosure of information. This occurs because atoi was used but strtoul should have been used to ensure correct calculations.
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Sources
CWEs
Related Vulnerabilities
Recommendations
Source: nvd
All GNU C Library users should upgrade to the latest version:
# emerge –sync
# emerge –ask –oneshot –verbose “>=sys-libs/glibc-2.34-r7”
Vulnerable Software (45)
Type: Configuration
Product: eglibc
Operating System: ubuntu trusty 14.04
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: altlinux
{ "fixed": "6:2.32-alt4"}
Source: redhat
Type: Configuration
Product: glibc
Operating System: ubuntu focal 20.04
{ "fixed": "2.31-0ubuntu9.7"}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: ubuntu groovy 20.10
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: ubuntu hirsute 21.04
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: ubuntu impish 21.10
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: ubuntu jammy 22.04
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: ubuntu kinetic 22.10
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: ubuntu lunar 23.04
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: ubuntu mantic 23.10
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: ubuntu noble 24.04
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: ubuntu oracular 24.10
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: ubuntu plucky 25.04
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: ubuntu questing 25.10
{ "unaffected": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: ubuntu xenial 16.04
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: glibc
Operating System: debian
{ "fixed": "2.31-13"}
Source: debian
Type: Configuration
Product: glibc
Operating System: rhel
{ "fixed": "2.28-164.el8"}
Source: redhat
Type: Configuration
Product: glibc
Operating System: rhel 8
{ "fixed": "2.28-164.el8"}
Source: redhat
Type: Configuration
Product: glibc
Operating System: astra 1.7.2.5
{ "unaffected": true}
Source: astra
Type: Configuration
Product: glibc
Operating System: astra 4.7.2.5
{ "unaffected": true}
Source: astra