Afs3-fileserver Exploit 'link' ⚡

While AFS-3 is a mature technology, its afs3-fileserver component represents a significant, high-value target in a network. By understanding that afs3-fileserver exploits are usually rooted in RPC processing bugs and by maintaining a strong, patched, and firewalled environment, organizations can keep their distributed data secure.

AFS3 uses a client-server architecture, where clients request files from servers. The server authenticates the client and grants access to the requested files. AFS3 uses a token-based authentication system, where clients obtain tokens from the server to access files. The tokens are used to authenticate the client and grant access to files. afs3-fileserver exploit

| CVE ID | Vulnerability Type | Impact | Affected Versions (Some Examples) | | :--- | :--- | :--- | :--- | | CVE-2021-47366 | Data Corruption / Logic Flaw | Incorrect data read from files >2GB due to sign-extension flaw. | Linux kernel's AFS client | | CVE-2024-10397 | Buffer Overflow | Denial of Service (DoS) & Potential RCE via malformed XDR responses. | OpenAFS before 1.8.10 | | CVE-2024-10396 | Input Validation | Fileserver crash, uninitialized memory leak, audit log corruption via malformed ACLs. | OpenAFS before 1.8.10 | | CVE-2013-1794 | Buffer Overflow | Remote DoS & Potential RCE via long fileserver ACL entries. | OpenAFS < 1.6.2 | | CVE-2009-1250 | Logic Flaw / Race Condition | Privilege escalation by spoofing "setuid" attribute on files. | OpenAFS Clients: 1.0 - 1.4.8 | | CVE-2007-6599 | Race Condition (Host_glock) | Remote Denial of Service (daemon crash) in the fileserver. | OpenAFS 1.3.50 - 1.4.5 | | CVE-2007-1507 | Design Error (Setuid) | Default configuration allowed spoofed responses to set "setuid" bits, leading to privilege escalation. | OpenAFS 1.4.x (<1.4.4) & 1.5.x (<1.5.17) | | DSA-1271-1 | Protocol Design Error | Forged FetchStatus call can make a binary appear setuid, enabling privilege escalation. | OpenAFS versions prior to 1.3.81-3sarge2 | | OESA-2024-1737 | Memory Corruption | Potential local privilege escalation or DoS. | Linux Kernel | While AFS-3 is a mature technology, its afs3-fileserver

The exploit was particularly serious because AFS was widely used in academic and research environments, where sensitive data was often stored on file servers. The vulnerability was also relatively easy to exploit, as attackers could use publicly available tools to craft the malicious protocol packets. The server authenticates the client and grants access

Require strong Kerberos v5 authentication and mandate full-packet payload encryption.