CVE-2022-26716

What it actually does

Memory corruption triggered by processing maliciously crafted web content due to insufficient state management, enabling arbitrary code execution.

Why it matters to the business

Attackers can gain remote code execution on systems handling web content via curl, potentially leading to system compromise, data theft, or ransomware deployment in high-prevalence environments; the issue remains exploitable after 1447 days with no KEV listing or EPSS growth.

How an attack unfolds

An attacker crafts malicious web content designed to trigger the memory corruption in state management; when curl processes this content, the flaw allows the attacker to corrupt memory and execute arbitrary code on the target system.

How to fix it

Upgrade curl to the fixed commit 5ce164e0e9290c96eb7d502173426c0a135ec008 across all instances; apply patches immediately given the long exposure window and potential downstream dependents.

How to confirm the fix worked

Confirm curl binary or source is at commit 5ce164e0e9290c96eb7d502173426c0a135ec008 or later; test processing of known malicious web payloads in a controlled environment to verify no crash or code execution occurs.

Typical attack path

1. Craft malicious web content exploiting state management flaws
2. Deliver content to a target system using curl for processing
3. Trigger memory corruption during content handling
4. Escalate to arbitrary code execution and establish persistence or exfiltrate data

How to detect it

Review curl process logs and crash reports for memory corruption indicators during web content fetches; correlate with network logs showing requests to suspicious URLs delivering crafted content.

What your security team should do

• Prioritize upgrade to fixed commit 5ce164e0e9290c96eb7d502173426c0a135ec008 within 30 days
• Scan all curl deployments for the vulnerable commit hash
• Monitor network traffic for unusual web content fetches that could trigger the flaw
• Review and harden web content handling pipelines using curl