CVE-2017-5495 Detail
Modified
This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Current Description
All versions of Quagga, 0.93 through 1.1.0, are vulnerable to an unbounded memory allocation in the telnet 'vty' CLI, leading to a Denial-of-Service of Quagga daemons, or even the entire host. When Quagga daemons are configured with their telnet CLI enabled, anyone who can connect to the TCP ports can trigger this vulnerability, prior to authentication. Most distributions restrict the Quagga telnet interface to local access only by default. The Quagga telnet interface 'vty' input buffer grows automatically, without bound, so long as a newline is not entered. This allows an attacker to cause the Quagga daemon to allocate unbounded memory by sending very long strings without a newline. Eventually the daemon is terminated by the system, or the system itself runs out of memory. This is fixed in Quagga 1.1.1 and Free Range Routing (FRR) Protocol Suite 2017-01-10.
Source:
MITRE
Description Last Modified:
01/24/2017
View Analysis Description
Analysis Description
All versions of Quagga, 0.93 through 1.1.0, are vulnerable to an unbounded memory allocation in the telnet 'vty' CLI, leading to a Denial-of-Service of Quagga daemons, or even the entire host. When Quagga daemons are configured with their telnet CLI enabled, anyone who can connect to the TCP ports can trigger this vulnerability, prior to authentication. Most distributions restrict the Quagga telnet interface to local access only by default. The Quagga telnet interface 'vty' input buffer grows automatically, without bound, so long as a newline is not entered. This allows an attacker to cause the Quagga daemon to allocate unbounded memory by sending very long strings without a newline. Eventually the daemon is terminated by the system, or the system itself runs out of memory. This is fixed in Quagga 1.1.1 and Free Range Routing (FRR) Protocol Suite 2017-01-10.
Source:
MITRE
Description Last Modified:
01/24/2017
Impact
CVSS v3.0 Severity and Metrics:
Base Score:
7.5 HIGH
Vector:
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
(V3 legend)
Impact Score:
3.6
Exploitability Score:
3.9
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High
CVSS v2.0 Severity and Metrics:
Base Score:
7.8 HIGH
Vector:
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
(V2 legend)
Impact Subscore:
6.9
Exploitability Subscore:
10.0
Access Vector (AV):
Network
Access Complexity (AC):
Low
Authentication (AU):
None
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
Complete
Additional Information:
Allows disruption of service
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Change History
4 change records found
- show changes
CVE Modified by MITRE -
1/4/2018 9:31:46 PM
Action |
Type |
Old Value |
New Value |
Added |
Reference |
|
http://rhn.redhat.com/errata/RHSA-2017-0794.html [No Types Assigned] |
CVE Modified by MITRE -
7/25/2017 9:29:06 PM
Action |
Type |
Old Value |
New Value |
Added |
Reference |
|
http://www.securitytracker.com/id/1037688 [No Types Assigned] |
Initial Analysis -
1/26/2017 10:53:24 AM
Action |
Type |
Old Value |
New Value |
Added |
CPE Configuration |
|
OR
*cpe:2.3:a:quagga:quagga:1.1.0:*:*:*:*:*:*:* (and previous) |
Added |
CVSS V2 |
|
(AV:N/AC:L/Au:N/C:N/I:N/A:C) |
Added |
CVSS V3 |
|
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Added |
CWE |
|
CWE-119 |
Changed |
Reference Type |
http://savannah.nongnu.org/forum/forum.php?forum_id=8783 No Types Assigned |
http://savannah.nongnu.org/forum/forum.php?forum_id=8783 Release Notes, Vendor Advisory |
Changed |
Reference Type |
https://github.com/freerangerouting/frr/pull/63 No Types Assigned |
https://github.com/freerangerouting/frr/pull/63 Vendor Advisory, Patch |
CVE Modified by MITRE -
1/25/2017 9:59:04 PM
Action |
Type |
Old Value |
New Value |
Added |
Reference |
|
http://www.securityfocus.com/bid/95745 [No Types Assigned] |
Added |
Reference |
|
https://lists.quagga.net/pipermail/quagga-dev/2017-January/016586.html [No Types Assigned] |
Quick Info
CVE Dictionary Entry:
CVE-2017-5495
NVD Published Date:
01/24/2017
NVD Last Modified:
01/04/2018
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