Deserialization in Solarwinds Orion Platform
CVE-2021-27277
This vulnerability allows local attackers to escalate privileges on affected installations of SolarWinds Orion Virtual Infrastructure Monitor 2020.2. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the OneTimeJobSchedulerEventsService WCF service. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-11955.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (64.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Solarwinds Orion Platform — versions 2020.2
- Solarwinds Orion Virtual Infrastructure Monitor — versions 2020.2
Weakness classification (CWE)
References
- www.zerodayinitiative.com/advisories/ZDI-21-373/ (VDB Entry, Third Party Advisory)
- documentation.solarwinds.com/en/Success_Center/SAM/Content/Release_Notes/SAM_20… (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-27277?
- CVE-2021-27277 is a high-severity vulnerability in Solarwinds Orion Platform, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2021-04-22.
- How severe is CVE-2021-27277?
- High severity. CVSS v3 base score is 7.8 out of 10.