Detections
Analytics
Oracle Linux 8 : openssh (ELSA-2019-3702)
medium Nessus Plugin ID 180726
Language:
Synopsis
The remote Oracle Linux host is missing one or more security updates.Description
The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2019-3702 advisory.- In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side. (CVE-2018-20685)
- An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c. (CVE-2019-6109)
- An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file). (CVE-2019-6111)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages.See Also
Plugin Details
Severity: Medium
ID: 180726
File Name: oraclelinux_ELSA-2019-3702.nasl
Version: 1.0
Type: local
Agent: unix
Published: 9/7/2023
Updated: 9/7/2023
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.0
CVSS v2
Risk Factor: Medium
Base Score: 5.8
Temporal Score: 4.5
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:P
CVSS Score Source: CVE-2019-6111
CVSS v3
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 6.1
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS Score Source: CVE-2019-6109
Vulnerability Information
CPE: p-cpe:/a:oracle:linux:openssh-keycat, p-cpe:/a:oracle:linux:openssh-cavs, p-cpe:/a:oracle:linux:openssh, p-cpe:/a:oracle:linux:openssh-askpass, p-cpe:/a:oracle:linux:openssh-ldap, p-cpe:/a:oracle:linux:openssh-server, p-cpe:/a:oracle:linux:pam_ssh_agent_auth, p-cpe:/a:oracle:linux:openssh-clients, cpe:/o:oracle:linux:8
Required KB Items: Host/OracleLinux, Host/RedHat/release, Host/RedHat/rpm-list, Host/local_checks_enabled
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 11/14/2019
Vulnerability Publication Date: 1/10/2019