Vulnerability identifier: #VU11759

Vulnerability risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2012-0385

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco IOS XE
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.

The weakness exists in the Smart Install feature due to improper input validation when processing a malformed Smart Install message on TCP port 4786. A remote attacker can cause the service to crash.

Mitigation
Update to versions 15.2(2)E, 15.2(1)EY, 15.2(1)E3, 15.2(1)E2, 15.2(1)E1, 15.2(1)E, 15.0(2)SE6, 15.0(2)SE5, 15.0(2)SE4, 15.0(2)SE2, 15.0(2)SE1, 15.0(2)SE, 15.0(2)EY2, 15.0(2)EY1, 15.0(2)EY, 15.0(2)EX5, 15.0(2)EX4, 15.0(2)EX3, 15.0(2)EX1, 15.0(2)EX, 15.0(2)EK1, 15.0(2)EK, 15.0(2)ED, 15.0(1)SE3, 15.0(1)SE2, 15.0(1)SE1, 12.2(60)EZ5, 12.2(60)EZ4, 12.2(60)EZ3, 12.2(60)EZ2, 12.2(60)EZ1, 12.2(60)EZ, 12.2(55)SE9, 12.2(55)SE8, 12.2(55)SE7, 12.2(55)SE6, 12.2(55)SE5, 16.1(0.14), 15.4(3)M, 15.4(2)T1, 15.4(2)T, 15.4(2)CG, 15.4(1)T2, 15.4(1)T1, 15.4(1)T, 15.4(1)CG1, 15.4(1)CG, 15.3(3)XB12, 15.3(3)M3, 15.3(3)M2, 15.3(3)M1, 15.3(3)M, 15.3(2)T4, 15.3(2)T3, 15.3(2)T2, 15.3(2)T1, 15.3(2)T, 15.3(1)T4, 15.3(1)T3, 15.3(1)T2, 15.3(1)T1, 15.3(1)T, 15.2(5.0)ST, 15.2(4)XB11, 15.2(4)M6b, 15.2(4)M6a, 15.2(4)M6, 15.2(4)M5, 15.2(4)M4, 15.2(4)M3, 15.2(4)M2, 15.2(4)M1, 15.2(4)JB6, 15.2(4)JB5m, 15.2(4)JB5, 15.2(4)JB4, 15.2(4)JB3s, 15.2(4)JB3b, 15.2(4)JB3a, 15.2(4)JB3, 15.2(4)JB1, 15.2(4)JB, 15.2(4)JAZ, 15.2(4)JA1, 15.2(4)JA, 15.2(4)GC2, 15.2(4)GC1, 15.2(4)GC, 15.2(4.0)ST, 15.2(4.0.64a)E, 15.2(3)T4, 15.2(3)T3, 15.2(3)T2, 15.2(3)T1, 15.2(3)T, 15.2(3)GCA1, 15.2(3)GCA, 15.2(3)GC1, 15.2(3)GC, 15.2(3.30)PIP, 15.2(2)T4, 15.2(2)T3, 15.2(2)T1, 15.2(2)T0.2, 15.2(2)JB4, 15.2(2)GC, 15.2(2.14)PI19, 15.2(2.10)T, 15.2(2.9.5)PIH18, 15.2(1)T4, 15.2(1)T2, 15.2(1)T1.12, 15.2(1)GC2, 15.2(1)EX0.5, 15.1(4)XB7, 15.1(4)XB5a, 15.1(4)M9, 15.1(4)M8, 15.1(4)M7, 15.1(4)M6, 15.1(4)M5, 15.1(4)M4, 15.1(4)M3.2, 15.1(4)GC2, 15.1(4)GC1, 15.1(4)GC, 15.1(3)T4, 15.1(3)T3, 15.1(2)SY3, 15.1(2)SY2, 15.1(2)SY1, 15.1(2)SY, 15.1(2)STV11.1, 15.1(2)SIV11.7, 15.1(2)SG4, 15.1(2)SG3, 15.1(2)SG2, 15.1(2)SG1, 15.1(2)SG1.129, 15.1(2)SG, 15.1(1)SY3, 15.1(1)SY2, 15.1(1)SY1, 15.1(1)SY, 15.1(1)SG5.252, 15.1(1)SG5.251, 15.1(1)SG2, 15.1(1)SG2.1.1, 15.1(1)SG1, 15.1(1)SG, 15.1(1.5)SID, 15.1(1.4)DPB18, 15.1(0.9)SG3, 15.0(9.0)PKD, 15.0(7.1)EMW, 15.0(6.97)EMD, 15.0(2)SE3, 15.0(2)EZ, 15.0(2)EJ1, 15.0(2)EJ, 15.0(2)EH, 15.0(2)EC, 15.0(2)EB, 15.0(2)EA, 15.0(1)EY2, 12.2(58)EZ or 3.2(0)SE.

Vulnerable software versions

Cisco IOS XE: 12.2.55 SE - 12.2.58 SE

---

External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-smartinstall

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.