CVE-2023-39979: moxa mxsecurity Small Space of Random Values
CVSS: 9.8v3.1CriticalModified
Published 02-09-2023Last modified 30-09-2024
Vulnerability summary
CVE-2023-39979 is a critical (CVSS 9.8) Small Space of Random Values vulnerability in moxa mxsecurity. EPSS estimates a 0.98% chance of exploitation in the next 30 days, higher than 61.6% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
0.98%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 02-09-2023PublishedVulnerability first disclosed.
- 30-09-2024Last modifiedVulnerability information updated.
Description
There is a vulnerability in MXsecurity versions prior to 1.0.1 that can be exploited to bypass authentication. A remote attacker might access the system if the web service authenticator has insufficient random values.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.98%
Chance of exploitation in the next 30 days
Percentile
62%
Versus all other CVEs
30-day change
0.00 pp
From 0.98% on 20-09-2026
20-09-202620-10-2026
EPSS score0.98%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-334Small Space of Random ValuesThe number of possible random values is smaller than needed by the product, making it more susceptible to brute force attacks.
- CWE-330Use of Insufficiently Random ValuesThe product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.
Affected systems
Moxa2 products
- mxsecurity< 1.1.0
- mxsecurity series≥ 1.0, ≤ 1.0.1
1 vendor · 2 products
References
1 links- www.moxa.com/en/…Vendor Advisory