CVE-2017-3768

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-01-26 · updated 2026-06-17
Weakness: CWE-400

Description

An unprivileged attacker with connectivity to the IMM2 could cause a denial of service attack on the IMM2 (Versions earlier than 4.4 for Lenovo System x and earlier than 6.4 for IBM System x). Flooding the IMM2 with a high volume of authentication failures via the Common Information Model (CIM) used by LXCA and OneCLI and other tools can exhaust available system memory which can cause the IMM2 to reboot itself until the requests cease.

Affected products

IBM Bladecenter Hs22 Firmware: before 6.4 — fixed in 6.4
IBM Bladecenter Hs23 Firmware: before 6.4 — fixed in 6.4
IBM Bladecenter Hs23E Firmware: before 6.4 — fixed in 6.4
IBM Flex System X220 M4 Firmware: before 6.4 — fixed in 6.4
IBM Flex System X222 M4 Firmware: before 6.4 — fixed in 6.4
IBM Flex System X240 M4 Firmware: before 6.4 — fixed in 6.4
IBM Flex System X280 M4 Firmware: before 6.4 — fixed in 6.4
IBM Flex System X440 M4 Firmware: before 6.4 — fixed in 6.4
IBM Flex System X480 M4 Firmware: before 6.4 — fixed in 6.4
IBM Flex System X880 M4 Firmware: before 6.4 — fixed in 6.4
IBM Idataplex Dx360 M4 Firmware: before 6.4 — fixed in 6.4
IBM Idataplex Dx360 M4 Water Cooled Firmware: before 6.4 — fixed in 6.4
IBM Nextscale Nx360 M4 Firmware: before 6.4 — fixed in 6.4
IBM System X3100 M4 Firmware: before 6.4 — fixed in 6.4
IBM System X3100 M5 Firmware: before 6.4 — fixed in 6.4
IBM System X3250 M4 Firmware: before 6.4 — fixed in 6.4
IBM System X3250 M5 Firmware: before 6.4 — fixed in 6.4
IBM System X3300 M4 Firmware: before 6.4 — fixed in 6.4
IBM System X3500 M4 Firmware: before 6.4 — fixed in 6.4
IBM System X3530 M4 Firmware: before 6.4 — fixed in 6.4
IBM System X3550 M4 Firmware: before 6.4 — fixed in 6.4
IBM System X3630 M4 Firmware: before 6.4 — fixed in 6.4
IBM System X3650 M4 Bd Firmware: before 6.4 — fixed in 6.4
IBM System X3650 M4 Firmware: before 6.4 — fixed in 6.4
IBM System X3650 M4 Hd Firmware: before 6.4 — fixed in 6.4
IBM System X3750 M4 Firmware: before 6.4 — fixed in 6.4
IBM System X3850 X6 Firmware: before 6.4 — fixed in 6.4
IBM System X3950 X6 Firmware: before 6.4 — fixed in 6.4
Lenova Flex System X240 M4 Firmware: before 4.4 — fixed in 4.4
Lenova Flex System X240 M5 Firmware: before 4.4 — fixed in 4.4

How to fix

Upgrade to a fixed version: IBM Bladecenter Hs22 Firmware 6.4; IBM Bladecenter Hs23 Firmware 6.4; IBM Bladecenter Hs23E Firmware 6.4; IBM Flex System X220 M4 Firmware 6.4; IBM Flex System X222 M4 Firmware 6.4; IBM Flex System X240 M4 Firmware 6.4; IBM Flex System X280 M4 Firmware 6.4; IBM Flex System X440 M4 Firmware 6.4; IBM Flex System X480 M4 Firmware 6.4; IBM Flex System X880 M4 Firmware 6.4; IBM Idataplex Dx360 M4 Firmware 6.4; IBM Idataplex Dx360 M4 Water Cooled Firmware 6.4. Check the vendor advisory for mitigations.

References

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