Vulnerability Name:

CVE-2016-5361 (CCN-111091)

Assigned:2016-02-29
Published:2016-02-29
Updated:2017-01-18
Summary:programs/pluto/ikev1.c in libreswan before 3.17 retransmits in initial-responder states, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed UDP packet.
Note: the original behavior complies with the IKEv1 protocol, but has a required security update from the libreswan vendor; as of 2016-06-10, it is expected that several other IKEv1 implementations will have vendor-required security updates, with separate CVE IDs assigned to each.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
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
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)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
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:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A: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
5.0 Medium (REDHAT CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-20
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2016-5361

Source: CCN
Type: RHSA-2016-2603
Moderate: libreswan security and bug fix update

Source: REDHAT
Type: UNKNOWN
RHSA-2016:2603

Source: CCN
Type: oss-sec Mailing List, Fri, 10 Jun 2016 08:34:34 -0400 (EDT)
Re: CVE Request: IKEv1 protocol is vulnerable to DoS amplification attack

Source: CCN
Type: GNU Web site
Glibc

Source: CCN
Type: US-CERT VU#419128
IKE/IKEv2 protocol implementations may allow network amplification attacks

Source: MLIST
Type: UNKNOWN
[oss-security] 20160610 Re: CVE Request: IKEv1 protocol is vulnerable to DoS amplification attack

Source: CCN
Type: Red Hat Bugzilla – Bug 1308508
(CVE-2016-5361) CVE-2016-5361 libreswan: IKEv1 protocol is vulnerable to DoS amplification attack

Source: XF
Type: UNKNOWN
multiple-ike-dos(111091)

Source: CCN
Type: libreswan GIT Repository
IKEv1: packet retransmit fixes for Main/Aggr/Xauth modes

Source: CONFIRM
Type: Patch, Vendor Advisory
https://github.com/libreswan/libreswan/commit/152d6d95632d8b9477c170f1de99bcd86d7fb1d6

Source: MLIST
Type: UNKNOWN
[swan-dev] 20160313 Proposal: Do not retransmit IKEv1 reply for initial responder states

Vulnerable Configuration:Configuration 1:
  • cpe:/a:libreswan:libreswan:*:*:*:*:*:*:*:* (Version <= 3.16)

    • Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:7:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/o:redhat:enterprise_linux:7::client:*:*:*:*:*

    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:7::server:*:*:*:*:*

    • Configuration RedHat 4:
  • cpe:/o:redhat:enterprise_linux:7::workstation:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.redhat.rhsa:def:20162603
    P
    		RHSA-2016:2603: libreswan security and bug fix update (Moderate)
    2016-11-03
    BACK
    libreswan libreswan *