Vulnerability identifier: #VU11760

Vulnerability risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-3271

CWE-ID: CWE-264

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 execute arbitrary code on the target system.

The weakness exists due to an unspecified flaw. A remote attacker can execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update to versions 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(4.0.64a)E, 15.2(4.0)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(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(2)T4, 15.2(2)T3, 15.2(2)T1, 15.2(2)T, 15.2(2)JB3, 15.2(2)JB2, 15.2(2)JB, 15.2(2)JAX, 15.2(2)JA1, 15.2(2)JA, 15.2(2)E, 15.2(1.0.0)IPI2, 15.2(1)T4, 15.2(1)T2, 15.2(1)T1, 15.2(1)T, 15.2(1)EY, 15.2(1)E3, 15.2(1)E2, 15.2(1)E1, 15.2(1)E, 15.2(0.19)T, 15.2(0.17.3)PIA17, 15.2(0.13.9)PIB17, 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, 15.1(4)M2, 15.1(4)GC2, 15.1(4)GC1, 15.1(3)T4, 15.1(3)T3, 15.1(3)T2, 15.1(2)SY3, 15.1(2)SY2, 15.1(2)SY1, 15.1(2)SY, 15.1(2)SG4, 15.1(2)SG3, 15.1(2)SG2, 15.1(2)SG1, 15.1(2)SG, 15.1(1)SY3, 15.1(1)SY2, 15.1(1)SY1, 15.1(1)SY, 15.1(1)SG5.170, 15.1(1)SG5.169, 15.1(1)SG5.163, 15.1(1)SG5.124, 15.1(1)SG5.103, 15.1(1)SG5.98, 15.1(1)SG5.83.1, 15.1(1)SG5.78.11, 15.1(1)SG5.64, 15.1(1)SG5.63, 15.0(4.4)DPB1, 15.0(4.1)SID, 15.0(2.26)DPB1.47, 15.0(2)SE6, 15.0(2)SE5, 15.0(2)SE4, 15.0(2)SE3, 15.0(2)SE2, 15.0(2)SE1, 15.0(2)SE, 15.0(2)EZ, 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)EJ1, 15.0(2)EJ, 15.0(2)EH, 15.0(2)ED, 15.0(2)EC, 15.0(2)EB, 15.0(2)EA, 15.0(1)SE3, 15.0(1)SE2, 15.0(1)SE, 15.0(1)EY2, 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(58)SE2, 12.2(58)SE1, 12.2(58)SE, 12.2(58)EZ, 12.2(58)EY, 12.2(55)SE9, 12.2(55)SE8, 12.2(55)SE7, 12.2(55)SE6, 12.2(55)SE5, 12.2(55)SE4, 12.2(55)SE3 or 12.2(55)EX3.

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-20110928-smart-instal...

---

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.