CVE-2021-3502

CVSS V2 Low 2.1 CVSS V3 Medium 5.5
Description
A flaw was found in avahi 0.8-5. A reachable assertion is present in avahi_s_host_name_resolver_start function allowing a local attacker to crash the avahi service by requesting hostname resolutions through the avahi socket or dbus methods for invalid hostnames. The highest threat from this vulnerability is to the service availability.
Overview
  • CVE ID
  • CVE-2021-3502
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-05-07T12:15:07
  • Last Modified Date
  • 2021-05-17T17:30:25
Weakness Enumerations
CWE URL
CWE-476 http://cwe.mitre.org/data/definitions/476.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:avahi:avahi:0.8-5:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:N/I:N/A:P
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 2.1
  • Severity
  • LOW
  • Exploitability Score
  • 3.9
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 5.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 1.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://github.com/lathiat/avahi/issues/338 Exploit Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1946914 Exploit Issue Tracking Patch Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-3502
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3502
History
Created Old Value New Value Data Type Notes
2022-05-10 16:15:57 Added to TrackCVE
2022-12-05 01:48:58 2021-05-07T12:15Z 2021-05-07T12:15:07 CVE Published Date updated
2022-12-05 01:48:58 2021-05-17T17:30:25 CVE Modified Date updated
2022-12-05 01:48:58 Analyzed Vulnerability Status updated