Cisco IOS XE Software HTTP API Command Injection Vulnerability

TL;DR 📌

A command injection vulnerability has been identified in the HTTP API subsystem of Cisco IOS XE Software. This flaw could allow an attacker to execute commands with root privileges, posing a significant security risk. Users are advised to upgrade to fixed software as there are no workarounds available.

What happened 🕵️‍♂️

Cisco has disclosed a vulnerability in the HTTP API subsystem of Cisco IOS XE Software that could allow a remote attacker to inject commands that execute with root privileges. This vulnerability arises from insufficient input validation. An attacker with administrative privileges could exploit this by authenticating to an affected system and making an API call with crafted input. Alternatively, an unauthenticated attacker could trick a legitimate user with administrative privileges into clicking a malicious link. Successful exploitation could lead to arbitrary command execution as the root user.

Affected products 🖥️

This vulnerability affects Cisco devices running a vulnerable release of Cisco IOS XE Software with the HTTP Server feature enabled. To check if the HTTP Server feature is enabled, use the command show running-config | include ip http server|secure|active in the CLI. If either the ip http server or ip http secure-server command is present, the feature is enabled.

Fixed software 🔧

Upgrade to the first fixed release in your train (or later):

Workarounds 🧯

There are no workarounds that address this vulnerability.

Risk in context 🎯

With a CVSS score of 8.8, this vulnerability is rated as High severity. The risk is heightened due to the potential for remote exploitation, especially if an attacker can trick a legitimate user into executing a malicious command. Organizations should prioritize patching affected systems to mitigate this risk.

Fast facts ⚡

• Vulnerability: Command Injection in HTTP API of Cisco IOS XE Software
• CVSS Score: 8.8 (High)
• Exploitation: Requires administrative privileges or social engineering
• Workarounds: None available
• Fixed Software: Available through Cisco Software Checker

For leadership 🧭

This vulnerability presents a High risk (CVSS 8.8) due to its potential for remote exploitation, requiring administrative access or social engineering tactics to execute. Organizations should prioritize patching affected systems within 7 days to mitigate risks associated with command injection. The operational impact is expected to be minimal, involving a brief maintenance window with no anticipated configuration drift.

Now: Identify affected devices and assess the current software version.
Next: Patch systems with the fixed software as soon as possible.
Later: Monitor for any signs of exploitation or unusual activity related to this vulnerability.