Deserialization in Nxlog
CVE-2020-35488
The fileop module of the NXLog service in NXLog Community Edition 2.10.2150 allows remote attackers to cause a denial of service (daemon crash) via a crafted Syslog payload to the Syslog service. This attack requires a specific configuration. Also, the name of the directory created must use a Syslog field. (For example, on Linux it is not possible to create a .. directory. On Windows, it is not possible to create a CON directory.)
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.076 (94.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.076 · newest: 0.076 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/GuillaumePetit84/CVE-2020-35488 (Exploit, Third Party Advisory, Mitigation)
- gitlab.com/nxlog-public/nxlog-ce/-/blob/master/ChangeLog.txt (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2020-35488?
- CVE-2020-35488 is a high-severity vulnerability in Nxlog, classified under Deserialization of Untrusted Data. CVSS score: 7.5/10. Published 2021-01-05.
- How severe is CVE-2020-35488?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-35488 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.