Vulnerability Monitor

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CVE-2015-4293

The packet-reassembly implementation in Cisco IOS XE 3.13S and earlier allows remote attackers to cause a denial of service (CPU consumption or packet loss) via fragmented (1) IPv4 or (2) IPv6 packets that trigger ATTN-3-SYNC_TIMEOUT errors after reassembly failures, aka Bug ID CSCuo37957.

Security Impact Summary

CVE-2015-4293 is a security vulnerability that . Impacting 1 product from cisco organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2015, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2015-07-30T14:59:00.087

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-399

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	ios_xe	2.1.0	Yes
Operating System	cisco	ios_xe	2.1.1	Yes
Operating System	cisco	ios_xe	2.1.2	Yes
Operating System	cisco	ios_xe	2.2.1	Yes
Operating System	cisco	ios_xe	2.2.2	Yes
Operating System	cisco	ios_xe	2.2.3	Yes
Operating System	cisco	ios_xe	2.3.0	Yes
Operating System	cisco	ios_xe	2.3.0t	Yes
Operating System	cisco	ios_xe	2.3.1t	Yes
Operating System	cisco	ios_xe	2.3.2	Yes
Operating System	cisco	ios_xe	2.4.0	Yes
Operating System	cisco	ios_xe	2.4.1	Yes
Operating System	cisco	ios_xe	2.5.0	Yes
Operating System	cisco	ios_xe	2.5.1	Yes
Operating System	cisco	ios_xe	2.5.2	Yes
Operating System	cisco	ios_xe	2.6.0	Yes
Operating System	cisco	ios_xe	2.6.1	Yes
Operating System	cisco	ios_xe	2.6.2	Yes
Operating System	cisco	ios_xe	3.10s.0	Yes
Operating System	cisco	ios_xe	3.10s.0a	Yes
Operating System	cisco	ios_xe	3.10s.1	Yes
Operating System	cisco	ios_xe	3.10s.2	Yes
Operating System	cisco	ios_xe	3.10s.3	Yes
Operating System	cisco	ios_xe	3.11s.0	Yes
Operating System	cisco	ios_xe	3.11s.1	Yes
Operating System	cisco	ios_xe	3.11s.2	Yes
Operating System	cisco	ios_xe	3.12s.0	Yes
Operating System	cisco	ios_xe	3.12s.1	Yes
Operating System	cisco	ios_xe	3.13s.0	Yes

References

http://tools.cisco.com/security/center/viewAlert.x?alertId=40215 Vendor Advisory ([email protected])
http://www.securitytracker.com/id/1033122 ([email protected])
http://tools.cisco.com/security/center/viewAlert.x?alertId=40215 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1033122 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.