CVE-2019-6111
high-risk
Published 2019-01-31
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).
Do I need to act?
!
54.4% chance of exploitation in next 30 days
EPSS score — higher than 46% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10
Medium
NETWORK
/ HIGH complexity
Affected Products (20)
Affected Vendors
References (46)
Broken Link
http://www.securityfocus.com/bid/106741
Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3702
Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
Release Notes
https://cvsweb.openbsd.org/src/usr.bin/ssh/scp.c
Third Party Advisory
https://security.gentoo.org/glsa/201903-16
Third Party Advisory
https://security.netapp.com/advisory/ntap-20190213-0001/
Third Party Advisory
https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt
Third Party Advisory
https://usn.ubuntu.com/3885-1/
Third Party Advisory
https://usn.ubuntu.com/3885-2/
Third Party Advisory
https://www.debian.org/security/2019/dsa-4387
and 26 more references
59
/ 100
high-risk
Severity
18/34 · Moderate
Exploitability
18/34 · Moderate
Exposure
23/34 · High