Skip to content
Noroxi
CVE-2017-3768· NVD / CVE Program· CNA lenovo

An unprivileged attacker with connectivity to the IMM2 could cause a denial of service attack on the IMM2 (Versions earlier than 4.4 for Len

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.

HighCVSS 7.5 · v3.0—No exploit No fix recorded
Published
Jan 26, 2018
Updated
Jun 16, 2026
EPSS
1.2% · 67th percentile
Follow this CVE

Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

Affected systems

VendorProduct
lenovaflex system x240 m5 firmware
lenovaflex system x240 m5
lenovaflex system x280 x6 firmware
lenovaflex system x280 x6
lenovaflex system x440 m4 firmware
lenovaflex system x440 m4
lenovaflex system x480 x6 firmware
lenovaflex system x480 x6
lenovaflex system x880 firmware
lenovaflex system x880
lenovanextscale nx360 m5 firmware
lenovanextscale nx360 m5

and 72 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • ibm bladecenter hs22 firmwarebefore 6.4
  • ibm bladecenter hs23 firmwarebefore 6.4
  • ibm bladecenter hs23e firmwarebefore 6.4
  • ibm flex system x220 m4 firmwarebefore 6.4
  • ibm flex system x222 m4 firmwarebefore 6.4
  • ibm flex system x240 m4 firmwarebefore 6.4
  • ibm flex system x280 m4 firmwarebefore 6.4
  • ibm flex system x440 m4 firmwarebefore 6.4
  • ibm flex system x480 m4 firmwarebefore 6.4
  • ibm flex system x880 m4 firmwarebefore 6.4
  • ibm idataplex dx360 m4 firmwarebefore 6.4
  • ibm idataplex dx360 m4 water cooled firmwarebefore 6.4
  • ibm nextscale nx360 m4 firmwarebefore 6.4
  • ibm system x3100 m4 firmwarebefore 6.4
  • ibm system x3100 m5 firmwarebefore 6.4
  • ibm system x3250 m4 firmwarebefore 6.4
  • ibm system x3250 m5 firmwarebefore 6.4
  • ibm system x3300 m4 firmwarebefore 6.4
  • ibm system x3500 m4 firmwarebefore 6.4
  • ibm system x3530 m4 firmwarebefore 6.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (lenovo). Independent of NVD's CPE analysis and usually ahead of it.

  • Lenovo Group Ltd. Integrated Management Module 2 (IMM2)

    • Earlier than 4.4 for Lenovo System x, Earlier than 6.4 for IBM System xaffected

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
function expand(node) {  return node.children.map(expand);}

Fixed

ts
const MAX_DEPTH = 32;function expand(node, depth = 0) {  if (depth > MAX_DEPTH) throw new Error("too deep");  return node.children.map((c) => expand(c, depth + 1));}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records