CVE-2019-7639 Auth bypass in n/a

What is CVE-2019-7639?

CVE-2019-7639 is a high-severity authentication bypass vulnerability in Fedoraproject Fedora, published on 8 Feb 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-863

Which versions are affected by CVE-2019-7639?

It affects 2 products.

Products include Fedoraproject Fedora, Gsi-Openssh Project Gsi-Openssh.

How do I fix CVE-2019-7639?

No fix has been published for CVE-2019-7639 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2019-7639 being exploited?

There is no known exploitation of CVE-2019-7639 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-8fqg-fw5h-m988.