Improper input validation in Heimdalsecurity Heimdal
CVE-2018-5731
An issue was discovered in Heimdal PRO 2.2.190. As part of the scanning feature, a process called md.hs writes an executable called CS1.tmp to C:\windows\TEMP. Afterwards the executable is run. It is possible for an attacker to create the file first, let md.hs overwrite it, and then rewrite the file in the window between md.hs closing the file and executing it. This can be exploited via opportunistic locks and a high priority thread. The vulnerability is triggered when a scan starts. NOTE: any affected Heimdal products are completely unrelated to the Heimdal vendor of a Kerberos 5 product on the h5l.org web site.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (32.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Heimdalsecurity Heimdal — versions 2.2.190
Weakness classification (CWE)
References
- improsec.com/blog/heimdal-advisory-2 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-5731?
- CVE-2018-5731 is a high-severity vulnerability in Heimdalsecurity Heimdal, classified under Improper Input Validation. CVSS score: 7.0/10. Published 2018-03-22.
- How severe is CVE-2018-5731?
- High severity. CVSS v3 base score is 7.0 out of 10.