Improper input validation in Cisco iOS 12.2(53)se1
CVE-2020-3204
A vulnerability in the Tool Command Language (Tcl) interpreter of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker with privileged EXEC credentials to execute arbitrary code on the underlying operating system (OS) with root privileges. The vulnerability is due to insufficient input validation of data passed to the Tcl interpreter. An attacker could exploit this vulnerability by loading malicious Tcl code on an affected device. A successful exploit could allow the attacker to cause memory corruption or execute the code with root privileges on the underlying OS of the affected device.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.004 (30.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Cisco Ios 12.2(53)se1 — versions n/a
- Cisco Ios — versions 12.2\(6\)i1, 12.2\(33\)sre, 12.2\(33\)sre0a
- Cisco Ios_xe — versions 3.2.0se, 3.2.0sg, 3.2.1se
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-3204?
- CVE-2020-3204 is a medium-severity vulnerability in Cisco iOS 12.2(53)se1, classified under Improper Input Validation. CVSS score: 6.7/10. Published 2020-06-03.
- How severe is CVE-2020-3204?
- Medium severity. CVSS v3 base score is 6.7 out of 10.
- Is CVE-2020-3204 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.