CVE-2021-34718

published 2021-09-09

CVE-2021-34718: 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…

Priority P3 54 high 8.1 CVSS 3.1

AV N AC L PR L UI N S U C H I H A N

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.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
cisco	cisco_ios_xr_software	—	—
cisco	ios_xr	< 7.3.2	7.3.2
cisco	ios_xr	—	—
cisco	ios_xr	>= 7.4.0 < 7.4.1	7.4.1

CVSS provenance

nvd v3.1 8.1 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

nvd v2.0 8.5 HIGH AV:N/AC:L/Au:S/C:C/I:C/A:N

vendor_cisco 8.1 HIGH

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CWE-88