HOMEVULNERABILITIESCVE-2011-1935
CRITICAL

CVE-2011-1935

NVD-CWE-noinfoPublished: October 20, 2017· Updated: Jun 16, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2011-1935 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

tcpdump1 product(s)
libpcap
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://thread.gmane.org/gmane.network.tcpdump.devel/5018
PATCHhttp://www.openwall.com/lists/oss-security/2011/05/19/11
PATCHhttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=623868
PATCHhttp://thread.gmane.org/gmane.network.tcpdump.devel/5018
PATCHhttp://www.openwall.com/lists/oss-security/2011/05/19/11
PATCHhttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=623868
ADVISORYhttp://article.gmane.org/gmane.network.tcpdump.devel/4968
ADVISORYhttp://www.openwall.com/lists/oss-security/2014/02/08/5
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2011-1935/
ADVISORYhttp://article.gmane.org/gmane.network.tcpdump.devel/4968
ADVISORYhttp://www.openwall.com/lists/oss-security/2014/02/08/5
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2011-1935/

All References (14)

→
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

Quick Facts

CVE IDCVE-2011-1935
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedOct 20, 2017

Related CVEs (NVD-CWE-noinfo)

CVE-2012-4145
10.0
CVE-2012-4033
10.0
CVE-2012-2688
10.0
CVE-2012-4050
10.0
CVE-2012-3135
10.0
CVE-2012-4274
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2011-1935 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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