5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.7 Medium
AI Score
Confidence
High
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
0.007 Low
EPSS
Percentile
79.3%
Issue Overview:
The process_open function in sftp-server.c in OpenSSH before 7.6 does not properly prevent write operations in readonly mode, which allows attackers to create zero-length files.(CVE-2017-15906)
Affected Packages:
openssh
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 openssh to update your system.
New Packages:
src:
openssh-7.4p1-16.amzn2.0.1.src
x86_64:
openssh-7.4p1-16.amzn2.0.1.x86_64
openssh-clients-7.4p1-16.amzn2.0.1.x86_64
openssh-server-7.4p1-16.amzn2.0.1.x86_64
openssh-server-sysvinit-7.4p1-16.amzn2.0.1.x86_64
openssh-ldap-7.4p1-16.amzn2.0.1.x86_64
openssh-keycat-7.4p1-16.amzn2.0.1.x86_64
openssh-askpass-7.4p1-16.amzn2.0.1.x86_64
openssh-cavs-7.4p1-16.amzn2.0.1.x86_64
pam_ssh_agent_auth-0.10.3-2.16.amzn2.x86_64
openssh-debuginfo-7.4p1-16.amzn2.0.1.x86_64
Red Hat: CVE-2017-15906
Mitre: CVE-2017-15906
5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.7 Medium
AI Score
Confidence
High
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
0.007 Low
EPSS
Percentile
79.3%