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A race condition in the handling of the IPV6_2292PKTOPTIONS socket option in FreeBSD versions 12.1-STABLE before r359565, 12.1-RELEASE before p7, 11.4-STABLE before r362975, 11.4-RELEASE before p1, and 11.3-RELEASE before p11 allows a malicious application to modify memory after it has been freed. The vulnerability is due to missing synchronization in the socket option set handler, which can be exploited to achieve use-after-free and potentially execute arbitrary code in kernel context.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module (Ruby file) that exploits a local privilege escalation vulnerability (CVE-2020-7457) in the FreeBSD kernel's IPv6 socket handling. The exploit targets a use-after-free condition in the handling of the IPV6_2292PKTOPTIONS option in setsockopt, allowing an attacker to achieve arbitrary kernel read/write and escalate privileges to root. The module is operational and weaponized for use within the Metasploit framework, supporting multiple FreeBSD versions (9.0-9.3, 12.0, 12.1 on amd64). It requires a local shell session, write access to a directory (default: /tmp), and the presence of the 'cc' compiler. The exploit compiles and runs a C helper on the target, then executes a user-supplied payload (default: reverse shell) as root. The module is well-documented, includes references to advisories and source code, and is intended for post-exploitation privilege escalation on vulnerable FreeBSD systems.
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1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.