CVE-2011-1935

Name: CVE-2011-1935
Creator: NVD / NIST
Published: 2017-10-20T18:29:00.243+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.65%

Last modified Jun 16, 2026

CVE-2011-1935 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 3.65% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.65%

88.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Tcpdump	Libpcap	>= 1.1.1, < 1.2.1

References

http://article.gmane.org/gmane.network.tcpdump.devel/4968Broken Link, Issue Tracking, Third Party Advisory
http://thread.gmane.org/gmane.network.tcpdump.devel/5018Broken Link, Issue Tracking, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2011/05/19/11Broken Link, Issue Tracking, Mailing List, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2014/02/08/5Mailing List, Third Party Advisory
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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=623868Issue Tracking, Patch, Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2011-1935/Issue Tracking, Third Party Advisory
http://article.gmane.org/gmane.network.tcpdump.devel/4968Broken Link, Issue Tracking, Third Party Advisory
http://thread.gmane.org/gmane.network.tcpdump.devel/5018Broken Link, Issue Tracking, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2011/05/19/11Broken Link, Issue Tracking, Mailing List, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2014/02/08/5Mailing List, Third Party Advisory
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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=623868Issue Tracking, Patch, Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2011-1935/Issue Tracking, Third Party Advisory

Timeline

Published: Oct 20, 2017
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-1935?

How severe is CVE-2011-1935?

CVE-2011-1935 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.65% probability of exploitation in the next 30 days.

How do I fix CVE-2011-1935?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-1935?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST