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No exploitation reportedFix available

CVE-2020-12017

No exploitation reported by the sources we read.

  • Published2020-06-02
  • Fixed in08a05
  • WeaknessCWE-306

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

GE Grid Solutions Reason RT Clocks, RT430, RT431, and RT434, all firmware versions prior to 08A05. The device’s vulnerability in the web application could allow multiple unauthenticated attacks that could cause serious impact. The vulnerability may allow an unauthenticated attacker to execute arbitrary commands and send a request to a specific URL that could cause the device to become unresponsive. The unauthenticated attacker may change the password of the 'configuration' user account, allowing the attacker to modify the configuration of the device via the web interface using the new password. This vulnerability may also allow an unauthenticated attacker to bypass the authentication required to configure the device and reboot the system.

Timeline

dates in UTC
  1. 2020-06-0219:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-12017?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-12017?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Ge rt430 firmwareversion to verify
BranchAffectedFixed in
8.x< 08a0508a05
Ge rt431 firmwareversion to verify
BranchAffectedFixed in
8.x< 08a0508a05
Ge rt434 firmwareversion to verify
BranchAffectedFixed in
8.x< 08a0508a05

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-20-154-05 CISA1 known affected

    GE Grid Solutions Reason RT Clocks

    RT430 RT431 and RT434: all versions prior to 08A05

Full record on NVD

Fix

  1. Update Ge rt430 firmware to 08a05
  2. Mitigation from the vendor CISA ICSA-20-154-05 · 1 productGE strongly recommends users of time synchronization products update their units to firmware Version 08A05 or greater to resolve these issues.
  3. Mitigation from the vendor CISA ICSA-20-154-05 · 1 productGE recommends users evaluate their current risk and implement appropriate network security mitigation measures as follows:
  4. Mitigation from the vendor CISA ICSA-20-154-05 · 1 productUse strong network and physical security protection to prevent an attacker from reaching the local network where Reason clocks are normally installed.
  5. Mitigation from the vendor CISA ICSA-20-154-05 · 1 productBlock TCP/IP Ports 80 and 443 to block the HTTP/HTTPS access to the RT clock web interface, avoiding all vulnerabilities. The TCP/IP port blocking should be limited to the Ethernet port interface where the RT clock is connected, using Access Control List (ACL) for instance; otherwise, other HTTP/HT…
  6. Mitigation from the vendor CISA ICSA-20-154-05 · 1 productMinimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet
  7. Mitigation from the vendor CISA ICSA-20-154-05 · 1 productAnalyze security events to allow early detection of unexpected traffic/communication.

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.19.8read 2026-10-23
  • NVDCVSS 2.09read 2026-10-23
  • CNAweakness (CWE)CWE-306read 2026-10-23
  • NVDweakness (CWE)CWE-306read 2026-10-23
  • FIRST EPSSEPSS score2.3 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2020-06-02
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2020-12017?

GE Grid Solutions Reason RT Clocks, RT430, RT431, and RT434, all firmware versions prior to 08A05. The device’s vulnerability in the web application could allow multiple unauthenticated attacks that could cause serious impact. The vulnerability may allow an unauthenticated attacker to execute arbitrary commands and send a request to a specific URL that could cause the device to become unresponsive. The unauthenticated attacker may change the password of the 'configuration' user account, allowing the attacker to modify the configuration of the device via the web interface using the new password. This vulnerability may also allow an unauthenticated attacker to bypass the authentication required to configure the device and reboot the system.

Is CVE-2020-12017 actively exploited?

Active exploitation of CVE-2020-12017 has not been confirmed. Its EPSS score was 2.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-12017?

CVE-2020-12017 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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