An integer overflow flaw, leading to a heap-based buffer overflow, was found in the memcached binary protocol. An attacker could create a specially crafted message that would cause the memcached server to crash or, potentially, execute arbitrary code.
Find out more about CVE-2016-8704 from the MITRE CVE dictionary dictionary and NIST NVD.
The versions of memcached as shipped with Red Hat OpenStack Platform 7, 8 and 9 are affected by this issue however will not be updated. The latest version of memcached from Red Hat Enterprise Linux 7 can safely be allowed to supersede the earlier versions provided in the Red Hat OpenStack Platform channels.
| Base Score | 6.8 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:N/C:P/I:P/A:P |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| Availability Impact | Partial |
| CVSS3 Base Score | 9.8 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | High |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Mobile Application Platform 4.2 (rhmap-fh-openshift-templates) | RHSA-2017:0059 | 2017-01-11 |
| Red Hat Enterprise Linux 7 (memcached) | RHSA-2016:2819 | 2016-11-23 |
| Red Hat Enterprise Linux 6 (memcached) | RHSA-2016:2820 | 2016-11-23 |
| Platform | Package | State |
|---|---|---|
| Red Hat OpenStack Platform 9.0 | memcached | Will not fix |
| Red Hat OpenStack Platform 8.0 (Liberty) | memcached | Will not fix |
| Red Hat OpenStack Platform 10 | memcached | Not affected |
| Red Hat Mobile Application Platform On-Premise 4 | memcached | Affected |
| Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 | memcached | Will not fix |
This flaw is in the memcached binary protocol. If you client programs only use the ASCII protocol when communicating with memcached, you can disable the binary protocol and protect against this flaw by adding "-B ascii" to OPTIONS in /etc/sysconfig/memcached.
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