ed0e1e4d44
1979 changes to exploits/shellcodes Couchdb 1.5.0 - 'uuids' Denial of Service Apache CouchDB 1.5.0 - 'uuids' Denial of Service Beyond Remote 2.2.5.3 - Denial of Service (PoC) udisks2 2.8.0 - Denial of Service (PoC) Termite 3.4 - Denial of Service (PoC) SoftX FTP Client 3.3 - Denial of Service (PoC) Silverstripe 2.3.5 - Cross-Site Request Forgery / Open redirection SilverStripe CMS 2.3.5 - Cross-Site Request Forgery / Open Redirection Silverstripe CMS 3.0.2 - Multiple Vulnerabilities SilverStripe CMS 3.0.2 - Multiple Vulnerabilities Silverstripe CMS 2.4 - File Renaming Security Bypass SilverStripe CMS 2.4 - File Renaming Security Bypass Silverstripe CMS 2.4.5 - Multiple Cross-Site Scripting Vulnerabilities SilverStripe CMS 2.4.5 - Multiple Cross-Site Scripting Vulnerabilities Silverstripe CMS 2.4.7 - 'install.php' PHP Code Injection SilverStripe CMS 2.4.7 - 'install.php' PHP Code Injection Silverstripe Pixlr Image Editor - 'upload.php' Arbitrary File Upload SilverStripe CMS Pixlr Image Editor - 'upload.php' Arbitrary File Upload Silverstripe CMS 2.4.x - 'BackURL' Open Redirection SilverStripe CMS 2.4.x - 'BackURL' Open Redirection Silverstripe CMS - 'MemberLoginForm.php' Information Disclosure SilverStripe CMS - 'MemberLoginForm.php' Information Disclosure Silverstripe CMS - Multiple HTML Injection Vulnerabilities SilverStripe CMS - Multiple HTML Injection Vulnerabilities Apache CouchDB 1.7.0 and 2.x before 2.1.1 - Remote Privilege Escalation Apache CouchDB 1.7.0 / 2.x < 2.1.1 - Remote Privilege Escalation Monstra CMS before 3.0.4 - Cross-Site Scripting Monstra CMS < 3.0.4 - Cross-Site Scripting (2) Monstra CMS < 3.0.4 - Cross-Site Scripting Monstra CMS < 3.0.4 - Cross-Site Scripting (1) Navigate CMS 2.8 - Cross-Site Scripting Collectric CMU 1.0 - 'lang' SQL injection Joomla! Component CW Article Attachments 1.0.6 - 'id' SQL Injection LG SuperSign EZ CMS 2.5 - Remote Code Execution MyBB Visual Editor 1.8.18 - Cross-Site Scripting Joomla! Component AMGallery 1.2.3 - 'filter_category_id' SQL Injection Joomla! Component Micro Deal Factory 2.4.0 - 'id' SQL Injection RICOH Aficio MP 301 Printer - Cross-Site Scripting Joomla! Component Auction Factory 4.5.5 - 'filter_order' SQL Injection RICOH MP C6003 Printer - Cross-Site Scripting Linux/ARM - Egghunter (PWN!) + execve(_/bin/sh__ NULL_ NULL) Shellcode (28 Bytes) Linux/ARM - sigaction() Based Egghunter (PWN!) + execve(_/bin/sh__ NULL_ NULL) Shellcode (52 Bytes)
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2.7 KiB
Text
78 lines
No EOL
2.7 KiB
Text
mptcp_usr_connectx is the handler for the connectx syscall for the AP_MULTIPATH socket family.
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The logic of this function fails to correctly handle source and destination sockaddrs which aren't
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AF_INET or AF_INET6:
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// verify sa_len for AF_INET:
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if (dst->sa_family == AF_INET &&
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dst->sa_len != sizeof(mpte->__mpte_dst_v4)) {
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mptcplog((LOG_ERR, "%s IPv4 dst len %u\n", __func__,
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dst->sa_len),
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MPTCP_SOCKET_DBG, MPTCP_LOGLVL_ERR);
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error = EINVAL;
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goto out;
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}
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// verify sa_len for AF_INET6:
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if (dst->sa_family == AF_INET6 &&
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dst->sa_len != sizeof(mpte->__mpte_dst_v6)) {
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mptcplog((LOG_ERR, "%s IPv6 dst len %u\n", __func__,
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dst->sa_len),
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MPTCP_SOCKET_DBG, MPTCP_LOGLVL_ERR);
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error = EINVAL;
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goto out;
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}
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// code doesn't bail if sa_family was neither AF_INET nor AF_INET6
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if (!(mpte->mpte_flags & MPTE_SVCTYPE_CHECKED)) {
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if (mptcp_entitlement_check(mp_so) < 0) {
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error = EPERM;
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goto out;
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}
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mpte->mpte_flags |= MPTE_SVCTYPE_CHECKED;
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}
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// memcpy with sa_len up to 255:
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if ((mp_so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0) {
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memcpy(&mpte->mpte_dst, dst, dst->sa_len);
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}
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This PoC triggers the issue to overwrite the mpte_itfinfo field leading to a controlled pointer
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being passed to kfree when the socket is closed.
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Please note that these lengths seem to be trusted in multiple places - I would strongly suggest auditing
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this code quite thoroughly, especially as mptcp can be reached from more places as of iOS 11.
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Note that the MPTCP code does seem to be quite buggy; trying to get a nice PoC working for this buffer overflow
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bug I accidentally triggered the following error path:
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error = socreate_internal(dom, so, SOCK_STREAM, IPPROTO_TCP, p,
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SOCF_ASYNC, PROC_NULL);
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mpte_lock(mpte);
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if (error) {
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mptcplog((LOG_ERR, "%s: subflow socreate mp_so 0x%llx unable to create subflow socket error %d\n",
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(u_int64_t)VM_KERNEL_ADDRPERM(mp_so), error),
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MPTCP_SOCKET_DBG, MPTCP_LOGLVL_ERR);
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proc_rele(p);
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mptcp_subflow_free(mpts);
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return (error);
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}
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note that first argument to mptcplog has one too few arguments. It's probably not so interesting from a security
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POV but is indicative of untested code (this error path has clearly never run as it will always kernel panic.)
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This PoC is for MacOS but note that this code is reachable on iOS 11 from inside the app sandbox if you give yourself
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the multipath entitlement (which app store apps can now use.)
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Just run this PoC as root on MacOS for easy repro.
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Proof of Concept:
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https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/44849.zip |