4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.6 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
12.6%
Revision | Date | Changes |
---|---|---|
1.0 | August 20th, 2021 | Initial Release |
The CVE-ID tracking this issue: CVE-2021-28497
CVSSv3.1 Base Score: 4.4 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L)
This advisory documents the impact of an internally found vulnerability in Aristaβs MOS (Metamako Operating System) software which is supported on the 7130 product line. Under certain conditions, the bash shell may be accessible to unprivileged users in situations where they should not have access.
This issue was discovered internally and Arista is not aware of any malicious uses of this issue in customer networks.
Affected Software
MOS
Affected Platforms
The following products are affected by this vulnerability:
The following products are not affected:
To check the version of MOS running on the system, use the following commands
Switch#show version
Device: Metamako MetaConnect 96 with E-Series
SKU: DCS-7130-96E
Serial number: C96E-A7-36803-2
Software image version: 0.26.5
<output omitted for brevity>
In the above example, as the Switch is running 0.26.5, it is exposed to the vulnerability.
There is no mitigation available to address this vulnerability. For the final resolution, please refer to the next section which lists the details of the remediated software versions.
This vulnerability is being tracked by BUG567396. The recommended resolution is to upgrade to a remediated MOS version during a maintenance window.
This vulnerability has been fixed in the following MOS version:
A hotfix has been implemented as an extension, which can be downloaded from the following link. Note that in addition to patches for the vulnerability described in this security advisory 65, this hotfix also contains patches for vulnerabilities covered under security advisories 64 and 66.
The above hotfix is applicable to the following releases:
To install the hotfix, follow these instructions:
If you require further assistance, or if you have any further questions regarding this security notice, please contact the Arista Networks Technical Assistance Center (TAC) by one of the following methods:
By email: This email address is being protected from spambots. You need JavaScript enabled to view it.
By telephone: 408-547-5502 ; 866-476-0000
4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.6 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
12.6%