Upstream information
Description
Memcached version 1.5.5 contains an Insufficient Control of Network Message Volume (Network Amplification, CWE-406) vulnerability in the UDP support of the memcached server that can result in denial of service via network flood (traffic amplification of 1:50,000 has been reported by reliable sources). This attack appear to be exploitable via network connectivity to port 11211 UDP. This vulnerability appears to have been fixed in 1.5.6 due to the disabling of the UDP protocol by default.SUSE information
Overall state of this security issue: Running
This issue is currently rated as having moderate severity.
| National Vulnerability Database | |
|---|---|
| Base Score | 5 |
| Vector | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| Access Vector | Network |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
| National Vulnerability Database | |
|---|---|
| Base Score | 7.5 |
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Access Vector | Network |
| Access Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | High |
Note from the SUSE Security Team
This issue does not affect the default configuration of SUSE memcached packages. Users wishing to expose memcached to the network may want to disable UDP by adding to the -U 0 option to the MEMCACHED_PARAMS setting in /etc/sysconfig/memcached, or use firewall filtering to restrict access to trusted parties and avoid spoofed UDP source addresses. SUSE Bugzilla entry: 1083903 [IN_PROGRESS] SUSE Security Advisories:- SUSE-SU-2018:0955-1, published Mon Apr 16 13:09:35 MDT 2018
- SUSE-SU-2018:1103-1, published Fri Apr 27 13:10:52 MDT 2018
- SUSE-SU-2018:1326-1, published Wed May 16 19:13:49 MDT 2018
- TID7022726, published Sa 19. Mai 12:48:47 CEST 2018
- openSUSE-SU-2018:0968-1, published Tue, 17 Apr 2018 12:07:39 +0200 (CEST)
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Linux Enterprise Module for Server Applications 15 |
| Patchnames: SUSE Linux Enterprise Module for Server Applications 15 GA memcached |
| SUSE Linux Enterprise Server 12 SP3 |
| Patchnames: SUSE-SLE-SERVER-12-SP3-2018-647 |
| SUSE Linux Enterprise Server 12 SP4 |
| Patchnames: SUSE Linux Enterprise Server 12 SP4 GA memcached |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 |
| Patchnames: SUSE-SLE-SERVER-12-SP3-2018-647 |
| SUSE Linux Enterprise Software Development Kit 11 SP4 |
| Patchnames: sdksp4-memcached-13608 |
| SUSE Linux Enterprise Software Development Kit 12 SP4 |
| Patchnames: SUSE Linux Enterprise Software Development Kit 12 SP4 GA memcached-devel |
| SUSE OpenStack Cloud 6 |
| Patchnames: SUSE-OpenStack-Cloud-6-2018-752 |
| SUSE Studio Onsite 1.3 |
| Patchnames: slestso13-memcached-13608 |
| SUSE Studio Onsite Runner 1.3 |
| Patchnames: slestso13-memcached-13608 |
| openSUSE Leap 42.3 |
| Patchnames: openSUSE-2018-373 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.
| Product(s) | Source package | State |
|---|---|---|
| SUSE Linux Enterprise SDK 11 SP4 | memcached | Released |
| SUSE Linux Enterprise SDK 12 SP2 | memcached | Affected |
| SUSE Linux Enterprise Server 12 SP1 LTSS | memcached | Affected |
| SUSE Linux Enterprise Server 12 SP2 | memcached | Affected |
| SUSE Linux Enterprise Server 12 SP3 | memcached | Released |
| SUSE Openstack Cloud 6 | memcached | Affected |
| SUSE Openstack Cloud 7 | memcached | Affected |
| SUSE Storage 4 | memcached | Affected |
| SUSE Studio Onsite 1.3 | memcached | Released |
