wireshark: uninitialized variable in the CSN.1 dissector can cause a crash
Published Nov 3, 2011
4.3
MEDIUMCVSS 2.0
EPSS 2.28%
Description
The csnStreamDissector function in epan/dissectors/packet-csn1.c in the CSN.1 dissector in Wireshark 1.6.x before 1.6.3 does not initialize a certain variable, which allows remote attackers to cause a denial of service (application crash) via a malformed packet.
Affected products
No data.
No data.
Red Hat Enterprise Linux 4
wireshark
Not affected
Red Hat Enterprise Linux 5
wireshark
Not affected
Red Hat Enterprise Linux 6
wireshark
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | wireshark | Not affected | n/a |
| Red Hat Enterprise Linux 5 | wireshark | Not affected | n/a |
| Red Hat Enterprise Linux 6 | wireshark | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of wireshark as shipped with Red Hat Enterprise Linux 4, 5 and 6, as they did not include support for the CSN.1 dissector.
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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.28% (0.02281) | 82.52th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.37% (0.02367) | 81.55th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.27% (0.01271) | 78.12th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.33% (0.00334) | 72.05th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.33% (0.00334) | 70.40th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.33% (0.00334) | 66.58th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
References (13)
- http://anonsvn.wireshark.org/viewvc?view=revision&revision=39140 x_refsource_CONFIRMPatch
- http://openwall.com/lists/oss-security/2011/11/01/9 mailing-listx_refsource_MLISTPatch
- http://osvdb.org/76768 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/46644 third-party-advisoryx_refsource_SECUNIA
- http://www.securityfocus.com/bid/50479 vdb-entryx_refsource_BID
- http://www.wireshark.org/security/wnpa-sec-2011-17.html x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2011-4100 Vendor Advisory
- https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6351 x_refsource_CONFIRMPatch
- https://bugzilla.redhat.com/show_bug.cgi?id=750643 x_refsource_CONFIRMPatchIssue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/71090 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2011-4100
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14833 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2011-4100
| Link | Providers | Tags |
|---|---|---|
| http://anonsvn.wireshark.org/viewvc?view=revision&revision=39140 | x_refsource_CONFIRMPatch | |
| http://openwall.com/lists/oss-security/2011/11/01/9 | mailing-listx_refsource_MLISTPatch | |
| http://osvdb.org/76768 | vdb-entryx_refsource_OSVDB | |
| http://secunia.com/advisories/46644 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.securityfocus.com/bid/50479 | vdb-entryx_refsource_BID | |
| http://www.wireshark.org/security/wnpa-sec-2011-17.html | x_refsource_CONFIRM | |
| https://access.redhat.com/security/cve/CVE-2011-4100 | Vendor Advisory | |
| https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6351 | x_refsource_CONFIRMPatch | |
| https://bugzilla.redhat.com/show_bug.cgi?id=750643 | x_refsource_CONFIRMPatchIssue Tracking | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/71090 | vdb-entryx_refsource_XF | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-4100 | ||
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14833 | vdb-entrysignaturex_refsource_OVAL | |
| https://www.cve.org/CVERecord?id=CVE-2011-4100 |
Change history (0)
No recorded changes yet.