CVE-2011-1956

Wireshark vulnerability

CVSS

4.3

EPSS

5.9%

EPSS pct

92th

Exploited

No known

The bytes_repr_len function in Wireshark 1.4.5 uses an incorrect pointer argument, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via arbitrary TCP traffic.

Affected vendor

Wireshark

Affected product

Wireshark

CVSS vector

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

Published

2011-06-06

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 5.9% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2011-1956

Confirm whether Wireshark Wireshark is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2011-1956.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2011-1956

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2011-1956 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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