Vulnerability CVE-2018-1000115
Published: 2018-03-05

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.

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Redhat -> Openstack 
Memcached -> Memcached 
Debian -> Debian linux 
Canonical -> Ubuntu linux 

 References:
https://access.redhat.com/errata/RHBA-2018:2140
https://access.redhat.com/errata/RHSA-2018:1593
https://access.redhat.com/errata/RHSA-2018:1627
https://access.redhat.com/errata/RHSA-2018:2331
https://access.redhat.com/errata/RHSA-2018:2857
https://blogs.akamai.com/2018/03/memcached-fueled-13-tbps-attacks.html
https://github.com/memcached/memcached/commit/dbb7a8af90054bf4ef51f5814ef7ceb17d83d974
https://github.com/memcached/memcached/issues/348
https://github.com/memcached/memcached/wiki/ReleaseNotes156
https://twitter.com/dormando/status/968579781729009664
https://usn.ubuntu.com/3588-1/
https://www.debian.org/security/2018/dsa-4218
https://www.exploit-db.com/exploits/44264/
https://www.exploit-db.com/exploits/44265/
https://www.synology.com/support/security/Synology_SA_18_07
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