7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.4 High
AI Score
Confidence
High
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.97 High
EPSS
Percentile
99.7%
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.
access.redhat.com/errata/RHBA-2018:2140
access.redhat.com/errata/RHSA-2018:1593
access.redhat.com/errata/RHSA-2018:1627
access.redhat.com/errata/RHSA-2018:2331
access.redhat.com/errata/RHSA-2018:2857
blogs.akamai.com/2018/03/memcached-fueled-13-tbps-attacks.html
github.com/memcached/memcached/commit/dbb7a8af90054bf4ef51f5814ef7ceb17d83d974
github.com/memcached/memcached/issues/348
github.com/memcached/memcached/wiki/ReleaseNotes156
twitter.com/dormando/status/968579781729009664
usn.ubuntu.com/3588-1/
www.debian.org/security/2018/dsa-4218
www.exploit-db.com/exploits/44264/
www.exploit-db.com/exploits/44265/
www.synology.com/support/security/Synology_SA_18_07
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.4 High
AI Score
Confidence
High
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.97 High
EPSS
Percentile
99.7%