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Fencer Intel
medium 4.3

CVE-2011-1956 json

The bytes_repr_len function in Wireshark 1.4.5 uses an incorrect pointer argument, which allows remote attackers to cause a denial of servi…

published 2011-06-06 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1950

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.9%
EPSS 5.9% chance of exploitation in 30 days, percentile 93%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • wireshark Debian 14, Debian 13, Debian 12 1.4.6-1

debian advisories DEBIAN-CVE-2011-1956

Timeline

  1. Published
  2. First public exploit (EDB-35873)

Exploit prediction

5.85% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-35873 Wireshark 1.4.5 - 'bytes_repr_len()' Null Pointer Dereference Denial of Service dos, 2011-06-17
  • openwall.com http://openwall.com/lists/oss-security/2011/05/31/19 referenced PoC, tagged "exploit" by a source, unverified
  • openwall.com http://openwall.com/lists/oss-security/2011/06/01/9 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.wireshark.org https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5837 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.