CVE-2018-1294
HIGHCVE-2018-1294 is a high-severity (CVSS 7.5) Improper Input Validation vulnerability in apache commons email. O3 Security detects and blocks CVE-2018-1294 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.
If a user of Apache Commons Email (typically an application programmer) passes unvalidated input as the so-called "Bounce Address", and that input contains line-breaks, then the email…
Description
If a user of Apache Commons Email (typically an application programmer) passes unvalidated input as the so-called "Bounce Address", and that input contains line-breaks, then the email details (recipients, contents, etc.) might be manipulated. Mitigation: Users should upgrade to Commons-Email 1.5. You can mitigate this vulnerability for older versions of Commons Email by stripping line-breaks from data, that will be passed to Email.setBounceAddress(String).
Affected Products
commons emailapacheDetection & mitigation playbook
Vendor / applianceDetect
Inventory every apache commons email deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for exploitation at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.
Remediation status
No patch has shipped for CVE-2018-1294 yet — track the apache commons email advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.
How O3 protects you
O3 detects and blocks CVE-2018-1294 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.
Tailored to CVE-2018-1294. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2018-1294 being exploited in your environment?
O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2018-1294 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.