CVE-2019-7639 — HIGH (8.1) — White Hats Nepal

Vulnerability Description

An issue was discovered in gsi-openssh-server 7.9p1 on Fedora 29. If PermitPAMUserChange is set to yes in the /etc/gsissh/sshd_config file, logins succeed with a valid username and an incorrect password, even though a failure entry is recorded in the /var/log/messages file.

CVSS Score

8.1

HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Fedoraproject	Fedora	28
Gsi-Openssh Project	Gsi-Openssh	7.9

Related Weaknesses (CWE)

CWE-863

References

https://bugzilla.redhat.com/show_bug.cgi?id=1673802ExploitIssue TrackingThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1673802ExploitIssue TrackingThird Party Advisory

FAQ

What is CVE-2019-7639?

CVE-2019-7639 is a vulnerability with a CVSS score of 8.1 (HIGH). An issue was discovered in gsi-openssh-server 7.9p1 on Fedora 29. If PermitPAMUserChange is set to yes in the /etc/gsissh/sshd_config file, logins succeed with a valid username and an incorrect passwo...

How severe is CVE-2019-7639?

CVE-2019-7639 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2019-7639?

Check the references section above for vendor advisories and patch information. Affected products include: Fedoraproject Fedora, Gsi-Openssh Project Gsi-Openssh.