EUVD-2026-45163
GHSA-w4qj-vxw3-g77r
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable CIP parser with no auth required; OOB read can disclose adjacent stack memory (C:L) and crash the process (A:L).
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4DescriptionCVE.org
A vulnerability has been found in liftoff-sr CIPster up to 632336d414ef708a542377c1aa8d6fdb7c70a760. Affected by this issue is the function CipAppPath::deserialize_symbolic of the file source/src/cip/cipepath.cc. Such manipulation leads to out-of-bounds read. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. The name of the patch is 886a4d090e1c5b0475f0b1c2fe0606a8f0d6a519. A patch should be applied to remediate this issue.
AnalysisAI
Out-of-bounds read in CIPster's EtherNet/IP symbolic path parser exposes industrial control systems to remote availability disruption and potential memory disclosure. The flaw resides in CipAppPath::deserialize_symbolic (source/src/cip/cipepath.cc), where unsafe memcpy calls copy attacker-controlled byte counts from a network-supplied CIP symbolic path segment into a fixed-size stack buffer without bounds enforcement, reachable by a remote unauthenticated attacker sending a crafted EtherNet/IP explicit messaging request. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target device must be running a CIPster build prior to commit 886a4d090e1c5b0475f0b1c2fe0606a8f0d6a519 with its EtherNet/IP listener reachable on the network (typically TCP port 44818). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 6.9 (Medium) with vector AV:N/AC:L/AT:N/PR:N/UI:N reflects that exploitation requires no authentication and no special preconditions, but the official scoring assigns only low availability impact (VA:L) and no confidentiality impact (VC:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with network access to TCP port 44818 on a device running CIPster sends a crafted EtherNet/IP explicit messaging request containing a symbolic path segment with an oversized `byte_count` or `symbol_size` field. The `deserialize_symbolic` function passes the attacker-controlled length directly to `memcpy`, which reads beyond the bounds of the fixed-size stack-allocated `tag` buffer, potentially crashing the CIP stack process or leaking adjacent stack memory contents. … |
| Remediation | Apply patch commit 886a4d090e1c5b0475f0b1c2fe0606a8f0d6a519 from the CIPster GitHub repository (https://github.com/liftoff-sr/CIPster/commit/886a4d090e1c5b0475f0b1c2fe0606a8f0d6a519), which replaces unsafe `memcpy` calls with the bounds-enforcing `BufReader::get_bytes()` method and adds `std::range_error` handling in the message router. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-125 – Out-of-bounds Read
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External POC / Exploit Code
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