CVE-2010-0011 in uzbl
Summary
by MITRE
The eval_js function in uzbl-core.c in Uzbl before 2010.01.05 exposes the run method of the Uzbl object, which allows remote attackers to execute arbitrary commands via JavaScript code.
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Analysis
by VulDB Data Team • 05/01/2026
The vulnerability identified as CVE-2010-0011 resides within the uzbl web browser framework, specifically in the uzbl-core.c component where the eval_js function operates. This flaw represents a critical security weakness that enables remote attackers to exploit the browser's JavaScript execution capabilities by directly accessing and manipulating the Uzbl object's run method. The vulnerability affects all versions of Uzbl prior to the 2010.01.05 release, indicating a window of exposure where malicious actors could leverage this design flaw to compromise systems running vulnerable versions.
The technical implementation of this vulnerability stems from inadequate input validation and access control mechanisms within the eval_js function. When JavaScript code is processed through this function, it inadvertently provides attackers with direct access to the Uzbl object's run method, which serves as an execution interface for arbitrary commands. This represents a classic command injection vulnerability where user-supplied JavaScript code can be interpreted and executed with the privileges of the Uzbl process. The flaw essentially creates an unintended code execution pathway that bypasses normal security boundaries and allows for arbitrary command execution on the target system.
The operational impact of this vulnerability extends beyond simple remote code execution, as it fundamentally compromises the security model of the Uzbl browser framework. Attackers can leverage this vulnerability to execute malicious commands, potentially gaining full control over the affected system, escalating privileges, or establishing persistent backdoors. The remote nature of the attack means that adversaries do not require local access or physical presence to exploit the vulnerability, making it particularly dangerous in environments where Uzbl is deployed with network-accessible interfaces. This vulnerability directly aligns with CWE-78, which describes improper neutralization of special elements used in OS commands, and also maps to ATT&CK technique T1059.007 for JavaScript execution.
Mitigation strategies for this vulnerability primarily focus on immediate version updates to Uzbl 2010.01.05 or later, which contain the necessary patches to address the exposed run method functionality. System administrators should also implement network segmentation and access controls to limit exposure of Uzbl instances to untrusted networks or users. Additional protective measures include disabling JavaScript execution when not required, implementing strict input validation for all user-supplied content, and monitoring for suspicious command execution patterns. Organizations should also consider deploying web application firewalls and intrusion detection systems to detect and prevent exploitation attempts targeting this specific vulnerability. The remediation process must include thorough testing of updated versions to ensure that the patch does not introduce regressions in functionality while maintaining the security improvements.