Two vulnerabilities in Cisco IOS XR
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2017-6731 CVE-2017-6728 |
| CWE-ID | CWE-20 CWE-264 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Cisco IOS XR Operating systems & Components / Operating system |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Denial of service
EUVDB-ID: #VU7365
Risk: Low
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-6731
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote unauthenticated attacker to cause DoS condition.
The weakness exists in Multicast Source Discovery Protocol (MSDP) ingress packet processing for Cisco IOS XR Software due to incorrect error handling of an MSDP packet that contains an error in the packet header. A remote attacker can send a malformed MSDP packet for an established MSDP session and cause the MSDP session to restart.
Successful exploitation of the vulnerability results in denial of service.
The vulnerability is addressed in the following versions:
6.3.1.19i.MCAST, 6.2.3.1i.MCAST, 6.2.2.17i.MCAST, 6.1.4.12i.MCAST.
Cisco IOS XR: 4.3.2.MCAST - 6.0.2
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170705-iosxr
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.
2) Privilege escalation
EUVDB-ID: #VU7366
Risk: Low
CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-6728
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to execute arbitrary code on the target system.
The weakness exists in in the CLI of Cisco IOS XR Software due to incorrect permissions. A local attacker can execute arbitrary code with root privileges.
Successful exploitation of the vulnerability may result in system compromise.
The vulnerability is addressed in the following versions:
6.3.1.15i.BASE, 6.2.3.1i.BASE, 6.2.2.15i.BASE, 6.1.4.10i.BASE.
Cisco IOS XR: 6.2.1
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170705-ios
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
