Vulnerability · Published Jan 13, 2021 · Assigned by cisco

CVE-2021-1145Cisco StarOS for Cisco ASR 5000 Series Routers Arbitrary File Read Vulnerability

Medium 6.5

In plain English

A medium-severity security flaw in Cisco ASR 5000 Series Software from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)1.3%top 29.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability in the Secure FTP (SFTP) of Cisco StarOS for Cisco ASR 5000 Series Routers could allow an authenticated, remote attacker to read arbitrary files on an affected device. To exploit this vulnerability, the attacker would need to have valid credentials on the affected device. The vulnerability is due to insecure handling of symbolic links. An attacker could exploit this vulnerability by sending a crafted SFTP command to an affected device. A successful exploit could allow the attacker to read arbitrary files on the affected device.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco ASR 5000 Series Software	n/a

Weakness: CWE-61 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

20210113 Cisco StarOS for Cisco ASR 5000 Series Routers Arbitrary File Read Vulnerability vendor-advisory, x_refsource_CISCO