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
7.6 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%
Issue Overview:
It was discovered that the memcached daemon listened on UDP port 11211 by default. An attacker could use memcached for UDP amplification denial-of-service attacks. The UDP port has been disabled by default, but can still be enabled.
It was discovered that the memcached connections using UDP transport protocol can be abused for efficient traffic amplification distributed denial of service (DDoS) attacks. A remote attacker could send a malicious UDP request using a spoofed source IP address of a target system to memcached, causing it to send a significantly larger response to the target. (CVE-2018-1000115)
Affected Packages:
memcached
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update memcached to update your system.
New Packages:
src:
memcached-1.4.15-10.amzn2.1.1.src
x86_64:
memcached-1.4.15-10.amzn2.1.1.x86_64
memcached-devel-1.4.15-10.amzn2.1.1.x86_64
memcached-debuginfo-1.4.15-10.amzn2.1.1.x86_64
Red Hat: CVE-2018-1000115
Mitre: CVE-2018-1000115
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | x86_64 | memcached | < 1.4.15-10.amzn2.1.1 | memcached-1.4.15-10.amzn2.1.1.x86_64.rpm |
Amazon Linux | 2 | x86_64 | memcached-devel | < 1.4.15-10.amzn2.1.1 | memcached-devel-1.4.15-10.amzn2.1.1.x86_64.rpm |
Amazon Linux | 2 | x86_64 | memcached-debuginfo | < 1.4.15-10.amzn2.1.1 | memcached-debuginfo-1.4.15-10.amzn2.1.1.x86_64.rpm |
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
7.6 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%