CVE-2018-7522

published 2018-05-04

CVE-2018-7522: In Schneider Electric Triconex Tricon MP model 3008 firmware versions 10.0-10.4, when a system call is made, registers are stored to a fixed memory location…

Priority P2 77 medium 6.7 CVSS 3.0

AV L AC L PR H UI N S U C H I H A H

ITW VulnCheck KEV

In Schneider Electric Triconex Tricon MP model 3008 firmware versions 10.0-10.4, when a system call is made, registers are stored to a fixed memory location. Modifying the data in this location could allow attackers to gain supervisor-level access and control system states.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
schneider-electric	triconex_tricon_mp_3008_firmware	10.0 – 10.0-10.4	—
schneider_electric	triconex_tricon	—	—

Detection & IOCs extracted from sources · hover to see the quote

url https://ics-cert.us-cert.gov/sites/default/files/file_attach/MAR-17-352-01.yara↗

• → HatMan malware specifically targets CVE-2018-7522 and CVE-2018-8872 on Triconex Tricon MP Model 3008 firmware 10.0-10.4; presence of HatMan binary components can be detected using the published YARA rule (MAR-17-352-01.yara). ↗
• → CVE-2018-7522 exploitation involves writing attacker-controlled data to a fixed memory location used to store registers during system calls, enabling supervisor-level privilege escalation on the Tricon MP Model 3008. ↗
• → HatMan malware requires unrestricted access to the safety network; monitor for unexpected remote or physical access to the safety network as a precursor indicator. ↗

• · CVE-2018-7522 only affects Triconex Tricon MP Model 3008 firmware versions 10.0 through 10.4; systems running Tricon CX v11.4 or later are not affected. ↗
• · Exploitation requires the attacker to already have local high-privilege access (CVSS AV:L/PR:H), limiting remote-only attack scenarios despite the advisory noting remote exploitability in the context of HatMan. ↗
• · Schneider Electric's HatMan malware detection service requires customers to have a support contract in place as of February 1, 2019; data must be sent to Schneider Electric for analysis. ↗

CVSS provenance

nvd v3.0 6.7 MEDIUM CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 7.2 HIGH AV:L/AC:L/Au:N/C:C/I:C/A:C

vulncheck 6.7 MEDIUM

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