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HighCISA KEVExploited in the wildPublic exploit

SimpleHelp Zip Slip Arbitrary File Upload Leading to RCE

IdentifiersCVE-2024-57728CWE-22· Improper Limitation of a Pathname…

CVE-2024-57728 affects SimpleHelp remote support software version 5.5.7 and earlier. It is a path traversal/arbitrary file upload issue caused by insufficient validation of file paths within uploaded crafted ZIP archives (zip slip). An authenticated SimpleHelp administrator can upload a malicious ZIP file whose archive entries traverse outside the intended extraction directory, allowing files to be written to arbitrary locations on the underlying host filesystem. The flaw can then be leveraged to achieve arbitrary code execution on the SimpleHelp server host in the security context of the SimpleHelp server user. Reported exploitation examples include planting malicious cron jobs on Linux or overwriting executables or libraries on Windows.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows arbitrary file write anywhere the SimpleHelp server user can write on the host filesystem, which can lead to remote code execution as the SimpleHelp server user. This can result in full compromise of the SimpleHelp server application, theft or modification of data stored on the server, persistence, and use of the compromised RMM platform to pivot into managed endpoints or downstream customer environments. The vulnerability has been reported as actively exploited and has been associated with ransomware intrusion chains.

Mitigation

If you can’t patch tonight, do this now.

Restrict access to the SimpleHelp administrative interface to trusted IP ranges, enable MFA for all administrator and technician accounts, and closely monitor for suspicious ZIP uploads, unexpected file creation outside application directories, unusual API key creation, and outbound activity from the SimpleHelp server. If mitigations or patches cannot be applied, disconnect or discontinue use of the exposed SimpleHelp instance. Treat CVE-2024-57728 together with CVE-2024-57726 where applicable, because privilege escalation can provide the administrator access needed to exploit this flaw.

Remediation

Patch, then assume compromise.

Upgrade SimpleHelp to a fixed release. The provided content states SimpleHelp released patches and advised customers to update to 5.5.8, 5.4.10, or 5.3.9, depending on branch. Apply vendor instructions for the affected branch, then audit the host for unauthorized file writes, uploaded archives, cron entries, overwritten binaries/libraries, and suspicious API keys or administrator activity. Rotate administrator and technician credentials after patching.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
SimpleHelpSimplehelpapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
Exposure mapping

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Threat actor evidence9

Every observed campaign linking this CVE to a named adversary.

Associated malware13

Malware families riding this exploit, with evidence and IOCs.

Detection signatures1

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity14

Community discussion across Reddit, Mastodon, and other social sources.