VAR-201504-0451

Vulnerability from variot - Updated: 2025-04-13 23:14

The ThinkServer System Manager (TSM) Baseboard Management Controller before firmware 1.27.73476 for ThinkServer RD350, RD450, RD550, RD650, and TD350 does not validate server certificates during an "encrypted remote KVM session," which allows man-in-the-middle attackers to spoof servers. Lenovo ThinkServer System Manager is prone to a security-bypass vulnerability. Attackers can exploit this issue through man-in-the-middle attacks to gain access to sensitive information, which may lead to further attacks. Lenovo ThinkServer System Manager (TSM) Baseboard Management Controller (BMC) for ThinkServer RD350, etc. is a controller embedded in the hardware devices of ThinkServer RD350 and other servers from China Lenovo to manage and monitor server status. There is a security vulnerability in the TSM BMC of several Lenovo ThinkServer products using firmware versions earlier than 1.27.73476. An attacker can use this vulnerability to implement a man-in-the-middle attack to deceive the server. The following products are affected: ThinkServer RD350, RD450, RD550, RD650, TD350

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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Events included in the timeline

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.