CVE-2011-1956
The bytes_repr_len function in Wireshark 1.4.5 uses an incorrect pointer argument, which allows remote attackers to cause a denial of…
- 4.3MediumCVSS base score
- 5.9%Exploitation in 30 daysEPSS · top 6.8% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 1Public exploitsMetasploit, Nuclei and Exploit-DB
Description
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list an Exploit-DB entry for it.
Show the exploits1
Exploit-DB1 entry
- Wireshark 1.4.5 - 'bytes_repr_len()' Null Pointer Dereference Denial of Service (Exploit-DB entry) (opens in a new tab)
EDB-ID 35873dos, windowspublished 17 Jun 2011Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By redhat
- 28 days later
· 28 days later
Published
- 13 years later
· 13 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 5.9% · top 6.8% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Affected products
n/a
- affected n/a
References
8
- http://www.wireshark.org/news/20110418.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20110531 CVE request for Wireshark 1.4.5 TCP DoS issue (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- oval:org.mitre.oval:def:14943 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- wireshark-desegmenttcp-dos(67789) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- [oss-security] 20110601 Re: CVE request for Wireshark 1.4.5 TCP DoS issue (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 44449 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://www.wireshark.org/docs/relnotes/wireshark-1.4.6.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5837 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2011-1950 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2011-1956)Record last updated .