Type Vulnerability
OpenPLC ScadaBR contains an unrestricted upload of file with dangerous type vulnerability that allows remote authenticated users to upload and execute arbitrary JSP files via view_edit.
OpenPLC
OpenPLC ScadaBR Unrestricted File Upload Vulnerability
CVE-2021-26828
What this means
This is rated high severity (8.8 out of 10). It is on the known-exploited catalogue, which means attacks using it have already been seen. Ask IT whether Scadabr Scadabr, Linux Linux Kernel and Microsoft Windows are in your estate, and treat that as the priority.
Full vendor description
OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows remote authenticated users to upload and execute arbitrary JSP files via view_edit.shtm.
Scoring and exploitation
8.8/ 10
CVSS 3.1 base scoreHigh
Exploitable over the network with a low-privilege account, and no one has to click or open anything. High impact on confidentiality, integrity and availability.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability
Longer bar: easier to attack
Attack vectorNetworkAV:N
Attack complexityLowAC:L
Privileges requiredLowPR:L
User interactionNoneUI:N
ScopeUnchangedS:U
Impact
Longer bar: more harm
ConfidentialityHighC:H
IntegrityHighI:H
AvailabilityHighA:H
- Elevated attack likelihood (~39.1% in 30 days)Model estimate (): a probability signal, not confirmed exploitation
- Exploited in the wild
- Yes — confirmed exploitation (US CISA )
- Not reported
- Listed product
- OpenPLC ScadaBR
Weaknesses
CWE-434
Affected products ()
- Scadabr Scadabr
- Linux Linux Kernel
- Microsoft Windows
Show the raw CPE strings (3)
- cpe:2.3:a:scadabr:scadabr:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
References
8 links from the CVE record, grouped by site; the vendor's advisory comes first.
forum.scadabr.com.br1 linkVendor advisory
- 4 (opens in a new tab)Broken Link · Exploit · Vendor Advisory
packetstormsecurity.com1 link
- ScadaBR-1.0-1.1CE-Linux-Shell-Upload.html (opens in a new tab)Exploit · Third Party Advisory
youtu.be1 link
- k1teIStQr1A (opens in a new tab)Exploit · Third Party Advisory
github.com1 link
- 2174 (opens in a new tab)Issue Tracking · Patch
cisa.gov1 link
- known-exploited-vulnerabilities-catalog (opens in a new tab)US Government Resource