Resource exhaustion in Memcached
CVE-2018-1000115
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.881 (99.8th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.873 · newest: 0.881 · change: +0.008
Affected products
- Memcached — versions 1.5.5
- Canonical Ubuntu Linux — versions 14.04, 16.04, 17.10
- Debian Linux — versions 8.0, 9.0
- Red Hat OpenStack — versions 8, 9, 10
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHBA-2018:2140 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1593 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3588-1/ (vendor-advisory, Third Party Advisory)
- github.com/memcached/memcached/wiki/ReleaseNotes156 (Third Party Advisory)
- www.exploit-db.com/exploits/44264/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- twitter.com/dormando/status/968579781729009664 (Third Party Advisory)
- www.exploit-db.com/exploits/44265/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- github.com/memcached/memcached/commit/dbb7a8af90054bf4ef51f5814ef7ceb17d83d974 (Patch, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2857 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:1627 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-1000115?
- CVE-2018-1000115 is a high-severity vulnerability in Memcached, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2018-03-05.
- How severe is CVE-2018-1000115?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2018-1000115 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.