The DecodeTCPOptions function in decode.c in Snort before 2.3.0, when printing TCP/IP options using FAST output or verbose mode, allows remote attackers to cause a denial of service (crash) via packets with invalid TCP/IP options, which trigger a null dereference
Published Dec 18, 2005
7.8
HIGHCVSS 2.0
EPSS 11.19%
Description
The DecodeTCPOptions function in decode.c in Snort before 2.3.0, when printing TCP/IP options using FAST output or verbose mode, allows remote attackers to cause a denial of service (crash) via packets with invalid TCP/IP options, which trigger a null dereference.
Affected products
No data.
- 2.1.0
- 2.1.1_rc1
- 2.1.3
- 2.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
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:L/Au:N/C:N/I:N/A:C
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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 11.19% (0.11194) | 95.83th | v5 (v2026.06.15) |
| Jun 15, 2026 | 11.19% (0.11194) | 95.38th | v5 (v2026.06.15) |
| Apr 30, 2025 | 22.66% (0.22655) | 95.48th | v4 (v2025.03.14) |
| Mar 30, 2025 | 19.02% (0.19022) | 94.84th | v4 (v2025.03.14) |
| Mar 29, 2025 | 15.29% (0.15288) | 91.07th | v4 (v2025.03.14) |
| Mar 17, 2025 | 19.02% (0.19022) | 94.85th | v4 (v2025.03.14) |
| Dec 17, 2024 | 4.10% (0.04103) | 92.05th | v3 (v2023.03.01) |
| Dec 12, 2024 | 5.58% (0.05585) | 93.54th | v3 (v2023.03.01) |
| Mar 24, 2023 | 6.12% (0.06122) | 92.37th | v3 (v2023.03.01) |
| Mar 7, 2023 | 6.83% (0.06829) | 92.76th | v3 (v2023.03.01) |
| Mar 6, 2023 | 11.00% (0.10995) | 94.86th | v2 (v2022.01.01) |
| Apr 1, 2022 | 11.00% (0.10995) | 94.44th | v2 (v2022.01.01) |
| Feb 4, 2022 | 11.00% (0.10995) | 88.52th | v2 (v2022.01.01) |
No CWE recorded.
References (9)
- http://secunia.com/advisories/13664 third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory
- http://securitytracker.com/id?1012656 vdb-entryx_refsource_SECTRACKExploitPatch
- http://taosecurity.blogspot.com/2004/12/details-on-snort-dos-condition-you-may.html x_refsource_MISCExploitVendor Advisory
- http://www.frsirt.com/exploits/20041222.angelDust.c.php x_refsource_MISC
- http://www.osvdb.org/12578 vdb-entryx_refsource_OSVDBExploit
- http://www.securiteam.com/exploits/6X00L20C0S.html x_refsource_MISCExploit
- http://www.securityfocus.com/bid/12084 vdb-entryx_refsource_BIDExploit
- http://www.snort.org/arc_news/ x_refsource_CONFIRM
- https://exchange.xforce.ibmcloud.com/vulnerabilities/18689 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/13664 | third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory | |
| http://securitytracker.com/id?1012656 | vdb-entryx_refsource_SECTRACKExploitPatch | |
| http://taosecurity.blogspot.com/2004/12/details-on-snort-dos-condition-you-may.html | x_refsource_MISCExploitVendor Advisory | |
| http://www.frsirt.com/exploits/20041222.angelDust.c.php | x_refsource_MISC | |
| http://www.osvdb.org/12578 | vdb-entryx_refsource_OSVDBExploit | |
| http://www.securiteam.com/exploits/6X00L20C0S.html | x_refsource_MISCExploit | |
| http://www.securityfocus.com/bid/12084 | vdb-entryx_refsource_BIDExploit | |
| http://www.snort.org/arc_news/ | x_refsource_CONFIRM | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/18689 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.