CVE-2021-34718
CVSS V2 High 8.5
CVSS V3 High 8.1
Description
A vulnerability in the SSH Server process of Cisco IOS XR Software could allow an authenticated, remote attacker to overwrite and read arbitrary files on the local device. This vulnerability is due to insufficient input validation of arguments that are supplied by the user for a specific file transfer method. An attacker with lower-level privileges could exploit this vulnerability by specifying Secure Copy Protocol (SCP) parameters when authenticating to a device. A successful exploit could allow the attacker to elevate their privileges and retrieve and upload files on a device that they should not have access to.
Overview
- CVE ID
- CVE-2021-34718
- Assigner
- ykramarz@cisco.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-09-09T05:15:11
- Last Modified Date
- 2021-09-21T20:01:30
Weakness Enumerations
CPE Configuration (Product)
CPE | Vulnerable | Operator | Version Start | Version End |
---|---|---|---|---|
AND | ||||
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.3.2 | |
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.4.0 | 7.4.1 |
cpe:2.3:h:cisco:asr_9000v-v2:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:asr_9902:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:asr_9903:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:*:* | 0 | OR | ||
AND | ||||
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.3.2 | |
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.4.0 | 7.4.1 |
cpe:2.3:h:cisco:ios_xrv:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ios_xrv_9000:-:*:*:*:*:*:*:* | 0 | OR | ||
AND | ||||
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.3.2 | |
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.4.0 | 7.4.1 |
cpe:2.3:h:cisco:ncs_520:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_540:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_540_fronthaul:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_560-4:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_560-7:-:*:*:*:*:*:*:* | 0 | OR | ||
AND | ||||
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.3.2 | |
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.4.0 | 7.4.1 |
cpe:2.3:h:cisco:ncs_5001:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_5002:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_5011:-:*:*:*:*:*:*:* | 0 | OR | ||
AND | ||||
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.3.2 | |
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.4.0 | 7.4.1 |
cpe:2.3:h:cisco:ncs_4009:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_4016:-:*:*:*:*:*:*:* | 0 | OR | ||
AND | ||||
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.3.2 | |
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.4.0 | 7.4.1 |
cpe:2.3:h:cisco:ncs_5501:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_5501-se:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_5502:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_5502-se:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_5508:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_5516:-:*:*:*:*:*:*:* | 0 | OR | ||
AND | ||||
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.3.2 | |
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.4.0 | 7.4.1 |
cpe:2.3:h:cisco:ncs_6000:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_6008:-:*:*:*:*:*:*:* | 0 | OR | ||
AND | ||||
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.3.2 | |
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 7.4.0 | 7.4.1 |
cpe:2.3:h:cisco:ncs_1001:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_1002:-:*:*:*:*:*:*:* | 0 | OR | ||
cpe:2.3:h:cisco:ncs_1004:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:S/C:C/I:C/A:N
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- SINGLE
- Confidentiality Impact
- COMPLETE
- Integrity Impact
- COMPLETE
- Availability Impact
- NONE
- Base Score
- 8.5
- Severity
- HIGH
- Exploitability Score
- 8
- Impact Score
- 9.2
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 8.1
- Base Severity
- HIGH
- Exploitability Score
- 2.8
- Impact Score
- 5.2
References
Reference URL | Reference Tags |
---|---|
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-scp-inject-QwZOCv2 | Vendor Advisory |
Sources
Source Name | Source URL |
---|---|
NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-34718 |
MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34718 |
History
Created | Old Value | New Value | Data Type | Notes |
---|---|---|---|---|
2022-05-10 06:54:10 | Added to TrackCVE | |||
2022-12-05 10:09:47 | psirt@cisco.com | ykramarz@cisco.com | CVE Assigner | updated |
2022-12-05 10:09:47 | 2021-09-09T05:15Z | 2021-09-09T05:15:11 | CVE Published Date | updated |
2022-12-05 10:09:47 | 2021-09-21T20:01:30 | CVE Modified Date | updated | |
2022-12-05 10:09:47 | Analyzed | Vulnerability Status | updated |