CVE-2021-34724 : A vulnerability in the Cisco IOS XE SD-WAN Software CLI could allow an authenticated, local attacker to elevate privileg

A vulnerability in the Cisco IOS XE SD-WAN Software CLI could allow an authenticated, local attacker to elevate privileges and execute arbitrary code on the underlying operating system as the root user. An attacker must be authenticated on an affected device as a PRIV15 user. This vulnerability is due to insufficient file system protection and the presence of a sensitive file in the bootflash directory on an affected device. An attacker could exploit this vulnerability by overwriting an installer file stored in the bootflash directory with arbitrary commands that can be executed with root-level privileges. A successful exploit could allow the attacker to read and write changes to the configuration database on the affected device.

Published 2021-09-23 03:15:19

Updated 2023-05-22 18:57:25

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: Execute codeBypassGain privilege

Exploit prediction scoring system (EPSS) score for CVE-2021-34724

EPSS FAQ

0.04%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 6 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-34724

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.6	MEDIUM	AV:L/AC:L/Au:N/C:C/I:C/A:N	3.9	9.2	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: None
6.0	MEDIUM	CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N	0.8	5.2	Cisco Systems, Inc.
Attack Vector: Local Attack Complexity: Low Privileges Required: High User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: None
6.0	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N	0.8	5.2	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: High User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: None

Products affected by CVE-2021-34724

Cisco » Ios Xe Sd-wan
Versions up to, including, (<=) 17.3.1a
cpe:2.3:o:cisco:ios_xe_sd-wan:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1000 Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-4g/6g Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-4p Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-8p Integrated Services Router » Version: N/A
When used together with: Cisco » 1100 Integrated Services Router » Version: N/A
When used together with: Cisco » 1101-4p Integrated Services Router » Version: N/A
When used together with: Cisco » 1101 Integrated Services Router » Version: N/A
When used together with: Cisco » 1109-2p Integrated Services Router » Version: N/A
When used together with: Cisco » 1109-4p Integrated Services Router » Version: N/A
When used together with: Cisco » 1109 Integrated Services Router » Version: N/A
When used together with: Cisco » 1111x-8p Integrated Services Router » Version: N/A
When used together with: Cisco » 1111x Integrated Services Router » Version: N/A
When used together with: Cisco » 111x Integrated Services Router » Version: N/A
When used together with: Cisco » 1120 Integrated Services Router » Version: N/A
When used together with: Cisco » 1160 Integrated Services Router » Version: N/A
When used together with: Cisco » 4000 Integrated Services Router » Version: N/A
When used together with: Cisco » 422 Integrated Services Router » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4321 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » 4351 Integrated Services Router » Version: N/A
When used together with: Cisco » 4431 Integrated Services Router » Version: N/A
When used together with: Cisco » 4451-x Integrated Services Router » Version: N/A
When used together with: Cisco » 4451 Integrated Services Router » Version: N/A
When used together with: Cisco » 4461 Integrated Services Router » Version: N/A
When used together with: Cisco » Asr 1000 » Version: N/A
When used together with: Cisco » Asr 1000-esp100 » Version: N/A
When used together with: Cisco » Asr 1000-x » Version: N/A
When used together with: Cisco » Asr 1000 Series » Version: N/A
When used together with: Cisco » Asr 1000 Series Route Processor (rp2) » Version: N/A
When used together with: Cisco » Asr 1000 Series Route Processor (rp3) » Version: N/A
When used together with: Cisco » Asr 1001 » Version: N/A
When used together with: Cisco » Asr 1001-hx » Version: N/A
When used together with: Cisco » Asr 1001-hx R » Version: N/A
When used together with: Cisco » Asr 1001-x » Version: N/A
When used together with: Cisco » Asr 1001-x R » Version: N/A
When used together with: Cisco » Asr 1002 » Version: N/A
When used together with: Cisco » Asr 1002-hx » Version: N/A
When used together with: Cisco » Asr 1002-hx R » Version: N/A
When used together with: Cisco » Asr 1002-x » Version: N/A
When used together with: Cisco » Asr 1002-x R » Version: N/A
When used together with: Cisco » Asr 1004 » Version: N/A
When used together with: Cisco » Asr 1006 » Version: N/A
When used together with: Cisco » Asr 1006-x » Version: N/A
When used together with: Cisco » Asr 1009-x » Version: N/A
When used together with: Cisco » Asr 1013 » Version: N/A
When used together with: Cisco » Asr 1023 » Version: N/A
When used together with: Cisco » Csr 1000v » Version: N/A

Vulnerability Details : CVE-2021-34724

Exploit prediction scoring system (EPSS) score for CVE-2021-34724

CVSS scores for CVE-2021-34724

CWE ids for CVE-2021-34724

References for CVE-2021-34724

Products affected by CVE-2021-34724