Denial of Service Vulnerability in Cisco StarOS Affecting ASR 5700 Series
CVE-2018-0239

7.5HIGH

Key Information:

Vendor
Cisco
Status
Cisco Staros
Vendor
CVE Published:
19 April 2018

Badges

👾 Exploit Exists🟡 Public PoC

Summary

A vulnerability exists in the egress packet processing of the Cisco StarOS operating system. This flaw allows unauthenticated remote attackers to disrupt the forwarding of packets by exploiting the maximum length check of transmitted packets. By sending specially crafted IP packets or fragments, an attacker can trigger this condition, causing the targeted device's interface to stop forwarding packets, potentially requiring manual intervention for resolution. This issue is applicable to the Cisco Aggregation Services Router (ASR) 5700 Series and both Virtualized Packet Core system software versions.

Affected Version(s)

Cisco StarOS Cisco StarOS

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2018-0239
Created by mr-won

References

https://tools.cisco.com/security/center/content/CiscoSecu...
x_refsource_CONFIRM
http://www.securityfocus.com/bid/103923
vdb-entryx_refsource_BID
http://www.securitytracker.com/id/1040720
vdb-entryx_refsource_SECTRACK

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.