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
Published Jun 6, 2011
4.3
MEDIUMCVSS 2.0
EPSS 5.85%
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.
Affected products
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of wireshark as shipped with Red Hat Enterprise Linux 4, 5, or 6. This flaw is specific to Wireshark v1.4.5 version.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.85% (0.05852) | 92.96th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.85% (0.05852) | 92.21th | v5 (v2026.06.15) |
| Mar 17, 2025 | 5.99% (0.05993) | 89.99th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.02% (0.01016) | 84.43th | v3 (v2023.03.01) |
| May 3, 2024 | 0.98% (0.00977) | 83.31th | v3 (v2023.03.01) |
| Jun 25, 2023 | 0.98% (0.00977) | 81.26th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.83% (0.00827) | 79.33th | v3 (v2023.03.01) |
| Mar 6, 2023 | 7.20% (0.07197) | 92.42th | v2 (v2022.01.01) |
| Apr 1, 2022 | 7.20% (0.07197) | 91.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 7.20% (0.07197) | 80.47th | v2 (v2022.01.01) |
No CWE recorded.
References (11)
- http://openwall.com/lists/oss-security/2011/05/31/19 mailing-listx_refsource_MLISTExploit
- http://openwall.com/lists/oss-security/2011/06/01/9 mailing-listx_refsource_MLISTExploit
- http://secunia.com/advisories/44449 third-party-advisoryx_refsource_SECUNIA
- http://www.wireshark.org/docs/relnotes/wireshark-1.4.6.html x_refsource_CONFIRMPatch
- http://www.wireshark.org/news/20110418.html x_refsource_CONFIRMPatch
- https://access.redhat.com/security/cve/CVE-2011-1956 Vendor Advisory
- https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5837 x_refsource_CONFIRMExploit
- https://exchange.xforce.ibmcloud.com/vulnerabilities/67789 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2011-1956
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14943 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2011-1956
| Link | Providers | Tags |
|---|---|---|
| http://openwall.com/lists/oss-security/2011/05/31/19 | mailing-listx_refsource_MLISTExploit | |
| http://openwall.com/lists/oss-security/2011/06/01/9 | mailing-listx_refsource_MLISTExploit | |
| http://secunia.com/advisories/44449 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.wireshark.org/docs/relnotes/wireshark-1.4.6.html | x_refsource_CONFIRMPatch | |
| http://www.wireshark.org/news/20110418.html | x_refsource_CONFIRMPatch | |
| https://access.redhat.com/security/cve/CVE-2011-1956 | Vendor Advisory | |
| https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5837 | x_refsource_CONFIRMExploit | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/67789 | vdb-entryx_refsource_XF | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-1956 | ||
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14943 | vdb-entrysignaturex_refsource_OVAL | |
| https://www.cve.org/CVERecord?id=CVE-2011-1956 |
Change history (0)
No recorded changes yet.