Executive Summary

Summary
Titleopenssh security update
Informations
NameDSA-4387First vendor Publication2019-02-09
VendorDebianLast vendor Modification2019-02-09
Severity (Vendor) N/ARevision1

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:P/A:P)
Cvss Base Score5.8Attack RangeNetwork
Cvss Impact Score4.9Attack ComplexityMedium
Cvss Expoit Score8.6AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

Harry Sintonen from F-Secure Corporation discovered multiple vulnerabilities in OpenSSH, an implementation of the SSH protocol suite. All the vulnerabilities are in found in the scp client implementing the SCP protocol.

CVE-2018-20685

Due to improper directory name validation, the scp client allows servers to modify permissions of the target directory by using empty or dot directory name.

CVE-2019-6109

Due to missing character encoding in the progress display, the object name can be used to manipulate the client output, for example to employ ANSI codes to hide additional files being transferred.

CVE-2019-6111

Due to scp client insufficient input validation in path names sent by server, a malicious server can do arbitrary file overwrites in target directory. If the recursive (-r) option is provided, the server can also manipulate subdirectories as well. . The check added in this version can lead to regression if the client and the server have differences in wildcard expansion rules. If the server is trusted for that purpose, the check can be disabled with a new -T option to the scp client.

For the stable distribution (stretch), these problems have been fixed in version 1:7.4p1-10+deb9u5.

We recommend that you upgrade your openssh packages.

For the detailed security status of openssh please refer to its security tracker page at: https://security-tracker.debian.org/tracker/openssh

Original Source

Url : http://www.debian.org/security/2019/dsa-4387

CWE : Common Weakness Enumeration

%idName
67 %CWE-284Access Control (Authorization) Issues
33 %CWE-20Improper Input Validation

CPE : Common Platform Enumeration

TypeDescriptionCount
Application133
Application49
Os4
Os1
Os1

Nessus® Vulnerability Scanner

DateDescription
2019-01-16Name : The remote Fedora host is missing a security update.
File : fedora_2019-f6ff819834.nasl - Type : ACT_GATHER_INFO

Alert History

If you want to see full details history, please login or register.
0
1
DateInformations
2019-02-20 12:12:10
  • Multiple Updates
2019-02-09 17:18:25
  • First insertion