A vulnerability in the data plane IP fragment handler of the Cisco Adaptive Security Appliance (ASA) CX Context-Aware Security module could allow an unauthenticated, remote attacker to cause the CX module to be unable to process further traffic, resulting in a denial of service (DoS) condition
Published Feb 1, 2017
8.6
HIGHCVSS 3.0
EPSS 2.66%
Description
A vulnerability in the data plane IP fragment handler of the Cisco Adaptive Security Appliance (ASA) CX Context-Aware Security module could allow an unauthenticated, remote attacker to cause the CX module to be unable to process further traffic, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of IP fragments. An attacker could exploit this vulnerability by sending crafted fragmented IP traffic across the CX module. An exploit could allow the attacker to exhaust free packet buffers in shared memory (SHM), causing the CX module to be unable to process further traffic, resulting in a DoS condition. This vulnerability affects all versions of the ASA CX Context-Aware Security module. Cisco has not released and will not release software updates that address this vulnerability. There are no workarounds that address this vulnerability. Cisco Bug IDs: CSCva62946.
Affected products
- Vendor n/a Product all versions of the ASA CX Context-Aware Security module Defaultn/a
- Version all versions of the ASA CX Context-Aware Security moduleStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | all versions of the ASA CX Context-Aware Security module | n/a |
|
- 9.0.1
- 9.0.1-40
- 9.0.2
- 9.0.2-68
- 9.0_base
- 9.1.2-29
- 9.1.2-42
- 9.1.3-8
- 9.1.3-10
- 9.1.3-13
- 9.2.1-1
- 9.2.2-1
- 9.3\(1.1.112\)
- 9.3.1-1
- 9.3.2-1
- 9.3.3.1-13
- 9.3.4-1
- 9.3.4-2
- 9.3.4-3
- 9.3.4-4
- 9.3.4-5
- 9.3.4-6
- 9.3.4.1.11
- 9.3_base
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.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.66% (0.02662) | 85.17th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.66% (0.02662) | 83.68th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.10% (0.01097) | 76.46th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.24% (0.00237) | 62.68th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.24% (0.00237) | 61.99th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.24% (0.00237) | 59.98th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Oct 18, 2022 | 1.14% (0.01136) | 58.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
References (3)
- http://www.securityfocus.com/bid/95788 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037696 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170125-cas x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/95788 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1037696 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170125-cas | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.