Vulnerability · Published Sep 24, 2020 · Assigned by cisco

CVE-2020-3423Cisco IOS XE Software Arbitrary Code Execution Vulnerability

Medium 5.1

In plain English

A medium-severity memory corruption in Cisco IOS XE Software 3.7.0S from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).

Severity (CVSS 3.1)5.1Medium

Exploit odds (30 days)0.4%top 67.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability in the implementation of the Lua interpreter that is integrated in Cisco IOS XE Software could allow an authenticated, local attacker to execute arbitrary code with root privileges on the underlying Linux operating system (OS) of an affected device. The vulnerability is due to insufficient restrictions on Lua function calls within the context of user-supplied Lua scripts. An attacker with valid administrative credentials could exploit this vulnerability by submitting a malicious Lua script. When this file is processed, an exploitable buffer overflow condition could occur. A successful exploit could allow the attacker to execute arbitrary code with root privileges on the underlying Linux OS of the affected device.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco IOS XE Software 3.7.0S	n/a

Weakness: CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N

References

20200924 Cisco IOS XE Software Arbitrary Code Execution Vulnerability vendor-advisory, x_refsource_CISCO