CVE-2019-17268
CRITICALCVE-2019-17268 is a critical-severity (CVSS 9.8) Code Injection vulnerability in omniauth-weibo-oauth2_project omniauth-weibo-oauth2. O3 Security detects and blocks CVE-2019-17268 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.
The omniauth-weibo-oauth2 gem 0.4.6 for Ruby, as distributed on RubyGems.org, included a code-execution backdoor inserted by a third party. Versions through 0.4.5, and 0.5.1 and later, are unaffected.
Description
The omniauth-weibo-oauth2 gem 0.4.6 for Ruby, as distributed on RubyGems.org, included a code-execution backdoor inserted by a third party. Versions through 0.4.5, and 0.5.1 and later, are unaffected.
Affected Products
omniauth-weibo-oauth2omniauth-weibo-oauth2_projectDetection & mitigation playbook
Vendor / applianceDetect
Inventory every omniauth-weibo-oauth2_project omniauth-weibo-oauth2 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-2019-17268 yet — track the omniauth-weibo-oauth2_project omniauth-weibo-oauth2 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-2019-17268 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-2019-17268. 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-2019-17268 being exploited in your environment?
O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2019-17268 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.