CVE-2021-34727

CVSS V2 High 10 CVSS V3 Critical 9.8
Description
A vulnerability in the vDaemon process in Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. This vulnerability is due to insufficient bounds checking when an affected device processes traffic. An attacker could exploit this vulnerability by sending crafted traffic to the device. A successful exploit could allow the attacker to cause a buffer overflow and possibly execute arbitrary commands with root-level privileges, or cause the device to reload, which could result in a denial of service condition.
Overview
  • CVE ID
  • CVE-2021-34727
  • Assigner
  • ykramarz@cisco.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-09-23T03:15:19
  • Last Modified Date
  • 2021-10-13T13:47:41
Weakness Enumerations
CWE URL
CWE-120 http://cwe.mitre.org/data/definitions/120.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:cisco:ios_xe_sd-wan:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asr_1000:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1000-esp100:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1000-x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1000_series:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1000_series_route_processor_\(rp2\):-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1000_series_route_processor_\(rp3\):-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1001:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1001-hx:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1001-hx_r:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1001-x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1001-x_r:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1002:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1002-hx:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1002-hx_r:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1002-x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1002-x_r:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1004:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1006:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1006-x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1009-x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1013:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1023:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:csr_1000v:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1000:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1100:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1100-4g\/6g:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1100-4p:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1100-8p:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1101:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1101-4p:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1109:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1109-2p:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1109-4p:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1111x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1111x-8p:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_111x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1120:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_1160:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_4000:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_422:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_4221:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_4321:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_4331:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_4351:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_4431:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_4451:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_4451-x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_4461:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:C/I:C/A:C
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 10
  • Severity
  • HIGH
  • Exploitability Score
  • 10
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 9.8
  • Base Severity
  • CRITICAL
  • Exploitability Score
  • 3.9
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxesdwan-rbuffover-vE2OB6tp Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-34727
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34727
History
Created Old Value New Value Data Type Notes
2022-05-10 06:51:48 Added to TrackCVE
2022-12-05 11:09:51 psirt@cisco.com ykramarz@cisco.com CVE Assigner updated
2022-12-05 11:09:51 2021-09-23T03:15Z 2021-09-23T03:15:19 CVE Published Date updated
2022-12-05 11:09:51 2021-10-13T13:47:41 CVE Modified Date updated
2022-12-05 11:09:51 Analyzed Vulnerability Status updated