Vulnerability CVE-2011-0949 - CERT Civis.Net

Vulnerability Name:

CVE-2011-0949 (CCN-67644)

Assigned:

2011-05-25

Published:

2011-05-25

Updated:

2011-07-12

Summary:

Cisco IOS XR 3.6.x, 3.8.x before 3.8.3, and 3.9.x before 3.9.1 does not properly remove sshd_lock files from /tmp/, which allows remote attackers to cause a denial of service (disk consumption) by making many SSHv1 connections, aka Bug ID CSCtd64417.

CVSS v3 Severity:

7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

CVSS v2 Severity:

7.8 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
5.8 Medium (Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete

7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
5.8 Medium (CCN Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete

Vulnerability Type:

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2011-0949

Source: CCN
Type: SA44725
Cisco IOS XR Multiple Vulnerabilities

Source: CISCO
Type: Vendor Advisory
20110525 Cisco IOS XR Software SSHv1 Denial of Service Vulnerability

Source: CCN
Type: cisco-sa-20110525-iosxr-ssh
Cisco IOS XR Software SSHv1 Denial of Service Vulnerability

Source: CCN
Type: OSVDB ID: 72621
Cisco IOS XR SSH Connection Saturation /tmp Disk Space Exhaustion Remote DoS

Source: CCN
Type: BID-47982
Cisco IOS XR SSHv1 '/tmp/ssh_lock' Remote Denial of Service Vulnerability

Source: XF
Type: UNKNOWN
ciscoiosxr-sshv1-dos(67644)

Vulnerable Configuration:

Configuration 1:

cpe:/o:cisco:ios_xr:3.6.0:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.6.1:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.6.2:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.6.3:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.8.0:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.8.1:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.8.2:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.9.0:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/o:cisco:ios_xr:3.4.1:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.4.0:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.4.2:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.4.3:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.5:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.5.3:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.5.2:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.5.4:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.6.0:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.6.1:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.6.2:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.6.3:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.7.0:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.7.1:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.7.2:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.7.3:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.8.1:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.8.0:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.8.2:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.8.3:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.8.4:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.9.0:*:*:*:*:*:*:*

OR cpe:/o:cisco:ios_xr:3.9.1:*:*:*:*:*:*:*

Denotes that component is vulnerable