CVE-2019-18823 Auth bypass in n/a

What is CVE-2019-18823?

CVE-2019-18823 is a critical authentication bypass vulnerability in Debian Debian Linux, published on 27 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

HTCondor up to and including stable series 8.8.6 and development series 8.9.4 has Incorrect Access Control. It is possible to use a different authentication method to submit a job than the administrator has specified. If the administrator has configured the READ or WRITE methods to include CLAIMTOBE, then it is possible to impersonate another user to the condor_schedd. (For example to submit or remove jobs)

Weakness: CWE-287

Which versions are affected by CVE-2019-18823?

It affects 3 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Wisc Htcondor.

How do I fix CVE-2019-18823?

Apply the vendor's patch.

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

Is CVE-2019-18823 being exploited?

There is no known exploitation of CVE-2019-18823 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2019-18823, DLA-2724-1, GHSA-4w4f-pcxr-8ppr, UBUNTU-CVE-2019-18823.