CVE-2019-6111

Published Jan 31, 2019

Last updated 4 months ago

CVSS medium 5.9

Overview

Description
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).
Source
cve@mitre.org
NVD status
Modified
Products
openssh, winscp, ubuntu_linux, debian_linux, enterprise_linux, enterprise_linux_eus, enterprise_linux_server_aus, enterprise_linux_server_tus, fedora, mina_sshd, freebsd, m10-1_firmware, m10-4_firmware, m10-4s_firmware, m12-1_firmware, m12-2_firmware, m12-2s_firmware, scalance_x204rna_firmware, scalance_x204rna_eec_firmware

Risk scores

CVSS 3.1

Type
Primary
Base score
5.9
Impact score
3.6
Exploitability score
2.2
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Severity
MEDIUM

CVSS 2.0

Type
Primary
Base score
5.8
Impact score
4.9
Exploitability score
8.6
Vector string
AV:N/AC:M/Au:N/C:N/I:P/A:P

Weaknesses

nvd@nist.gov
CWE-22
134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE-22

Social media

Hype score
Not currently trending

Configurations

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References

Sources include official advisories and independent security research.