CVE-2011-2174

4.3 MEDIUM 2% exploit odds Fix listed

What it is

Double free vulnerability in the tvb_uncompress function in epan/tvbuff.c in Wireshark 1.2.x before 1.2.17 and 1.4.x before 1.4.7 allows remote attackers to cause a denial of service (application crash) via a packet with malformed data that uses zlib compression.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 2.0% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2011-06-06 19:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:30 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 2.0% in the next 30 days (EPSS).
Severity: 4.3 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2011-06-06 19:55 UTC
Last modified: 2026-06-16 23:30 UTC
Exploit probability: 2.0% · EPSS, next 30 days
Weakness: CWE-399
Record status: Modified

Affected

Wireshark 1.2
Wireshark 1.2.0
Wireshark 1.2.1
Wireshark 1.2.2
Wireshark 1.2.3
Wireshark 1.2.4
Wireshark 1.2.5
Wireshark 1.2.6

Attack profile CVSS 2.0 · 4.3

Attack vector: Network
Complexity: Medium
Authentication: None
Confidentiality: None
Integrity: None
Availability: Partial

Raw vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record