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Files from timwr

First Active2015-02-09
Last Active2022-03-10
Dirty Pipe Local Privilege Escalation
Posted Mar 10, 2022
Authored by timwr, Max Kellermann | Site metasploit.com

This Metasploit module exploits a vulnerability that has been in the Linux kernel since version 5.8. It allows writing of read only or immutable memory. The vulnerability was fixed in Linux 5.16.11, 5.15.25 and 5.10.102. The module exploits this vulnerability by overwriting a suid binary with the payload, executing it, and then writing the original data back. There are two major limitations of this exploit: the offset cannot be on a page boundary (it needs to write one byte before the offset to add a reference to this page to the pipe), and the write cannot cross a page boundary. This means the payload must be less than the page size (4096 bytes).

tags | exploit, kernel
systems | linux
advisories | CVE-2022-0847
SHA-256 | 95e39ce5f94de2996183947c580313fe0356df719e22343a89d095b460489c7a
Firefox MCallGetProperty Write Side Effects Use-After-Free
Posted Mar 1, 2022
Authored by timwr, maxpl0it, 360 ESG Vulnerability Research Institute | Site metasploit.com

This Metasploit modules exploits CVE-2020-26950, a use-after-free exploit in Firefox. The MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This exploit uses a somewhat novel technique of spraying ArgumentsData structures in order to construct primitives. The shellcode is forced into executable memory via the JIT compiler, and executed by writing to the JIT region pointer. This exploit does not contain a sandbox escape, so firefox must be run with the MOZ_DISABLE_CONTENT_SANDBOX environment variable set, in order for the shellcode to run successfully. This vulnerability affects Firefox versions prior to 82.0.3, Firefox ESR versions prior to 78.4.1, and Thunderbird versions prior to 78.4.2, however only Firefox versions up to 79 are supported as a target. Additional work may be needed to support other versions such as Firefox 82.0.1.

tags | exploit, shellcode
advisories | CVE-2020-26950
SHA-256 | c5497acbfe1516edccf2f8747d261489391c42dfa92ad82028efc92b075df944
macOS Gatekeeper Check Bypass
Posted May 7, 2021
Authored by timwr, Cedric Owens | Site metasploit.com

This Metasploit module serves an OSX app (as a zip) that contains no Info.plist, which bypasses gatekeeper in macOS versions prior to 11.3. If the user visits the site on Safari, the zip file is automatically extracted, and clicking on the downloaded file will automatically launch the payload. If the user visits the site in another browser, the user must click once to unzip the app, and click again in order to execute the payload.

tags | exploit
systems | apple
advisories | CVE-2021-30657
SHA-256 | 63462c2e64d7852458a439220123a2d9aea8f3c2506a1452879ec40fef583f4f
Microsoft Windows DrawIconEx Local Privilege Escalation
Posted Dec 15, 2020
Authored by timwr, bee13oy, Yoav Alon, Netanel Ben-Simon | Site metasploit.com

This Metasploit module exploits CVE-2020-1054, an out of bounds write reachable from DrawIconEx within win32k. The out of bounds write can be used to overwrite the pvbits of a SURFOBJ. By utilizing this vulnerability to execute controlled writes to kernel memory, an attacker can gain arbitrary code execution as the SYSTEM user. This module has been tested against a fully updated Windows 7 x64 SP1. Offsets within the exploit code may need to be adjusted to work with other versions of Windows.

tags | exploit, arbitrary, kernel, code execution
systems | windows
advisories | CVE-2020-1054
SHA-256 | 868acae66ad56703c17e3c65ef2f0fd90bad10c8ec6f9816219080fe42106f93
Microsoft Windows Uninitialized Variable Local Privilege Escalation
Posted Oct 15, 2020
Authored by timwr, unamer, piotrflorczyk | Site metasploit.com

This Metasploit module exploits CVE-2019-1458, an arbitrary pointer dereference vulnerability within win32k which occurs due to an uninitialized variable, which allows user mode attackers to write a limited amount of controlled data to an attacker controlled address in kernel memory. By utilizing this vulnerability to execute controlled writes to kernel memory, an attacker can gain arbitrary code execution as the SYSTEM user. This module has been tested against Windows 7 x64 SP1. Offsets within the exploit code may need to be adjusted to work with other versions of Windows. The exploit can only be triggered once against the target and can cause the target machine to reboot when the session is terminated.

tags | exploit, arbitrary, kernel, code execution
systems | windows
advisories | CVE-2019-1458
SHA-256 | 965825e462e62b73a8b4edd4aeb9b9d17c52ab810644e44a21ae2613d7a92025
Safari Type Confusion / Sandbox Escape
Posted Oct 1, 2020
Authored by timwr, Insu Yun, Taesoo Kim, Jungwon Lim, Yonghwi Jin | Site metasploit.com

This Metasploit module exploits an incorrect side-effect modeling of the 'in' operator. The DFG compiler assumes that the 'in' operator is side-effect free, however the embed element with the PDF plugin provides a callback that can trigger side-effects leading to type confusion (CVE-2020-9850). The type confusion can be used as addrof and fakeobj primitives that then lead to arbitrary read/write of memory. These primitives allow us to write shellcode into a JIT region (RWX memory) containing the next stage of the exploit. The next stage uses CVE-2020-9856 to exploit a heap overflow in CVM Server, and extracts a macOS application containing our payload into /var/db/CVMS. The payload can then be opened with CVE-2020-9801, executing the payload as a user but without sandbox restrictions.

tags | exploit, overflow, arbitrary, shellcode
advisories | CVE-2020-9801, CVE-2020-9850, CVE-2020-9856
SHA-256 | fbbde1e0b4f53036aee6e135d84e5add073f53c612d6996cee132e6170926d16
macOS cfprefsd Arbitrary File Write / Local Privilege Escalation
Posted Sep 7, 2020
Authored by timwr, Insu Yun, Taesoo Kim, Jungwon Lim, Yonghwi Jin | Site metasploit.com

This Metasploit module exploits an arbitrary file write in cfprefsd on macOS versions 10.15.4 and below in order to run a payload as root. The CFPreferencesSetAppValue function, which is reachable from most unsandboxed processes, can be exploited with a race condition in order to overwrite an arbitrary file as root. By overwriting /etc/pam.d/login a user can then login as root with the login root command without a password.

tags | exploit, arbitrary, root
advisories | CVE-2020-9839
SHA-256 | 931484ae445d7eeffdc56096c8dbc47f24916e5073c7902aafc42973e228e845
Safari Webkit For iOS 7.1.2 JIT Optimization Bug
Posted Aug 14, 2020
Authored by timwr, Ian Beer, kudima, WanderingGlitch | Site metasploit.com

This Metasploit module exploits a JIT optimization bug in Safari Webkit. This allows us to write shellcode to an RWX memory section in JavaScriptCore and execute it. The shellcode contains a kernel exploit (CVE-2016-4669) that obtains kernel rw, obtains root and disables code signing. Finally we download and execute the meterpreter payload. This module has been tested against iOS 7.1.2 on an iPhone 4.

tags | exploit, kernel, root, shellcode
systems | apple, iphone, ios
advisories | CVE-2016-4669, CVE-2018-4162
SHA-256 | 8ca4b125e9aba514f4d2bd3c12b5189f4dceafcaab577262cc602a11c87480fb
Microsoft Windows NtUserMNDragOver Local Privilege Escalation
Posted May 8, 2020
Authored by Clement LECIGNE, timwr, Grant Willcox | Site metasploit.com

This Metasploit module exploits a NULL pointer dereference vulnerability in MNGetpItemFromIndex(), which is reachable via a NtUserMNDragOver() system call. The NULL pointer dereference occurs because the xxxMNFindWindowFromPoint() function does not effectively check the validity of the tagPOPUPMENU objects it processes before passing them on to MNGetpItemFromIndex(), where the NULL pointer dereference will occur. This module has been tested against Windows 7 x86 SP0 and SP1. Offsets within the solution may need to be adjusted to work with other versions of Windows, such as Windows Server 2008.

tags | exploit, x86
systems | windows
advisories | CVE-2019-0808
SHA-256 | fb3cf21123b0e2fbb662a608751638e9471714e3f0e34de79dd880b595ae013c
Google Chrome 72 / 73 Array.map Corruption
Posted Mar 5, 2020
Authored by timwr, Istvan Kurucsai, dmxcsnsbh | Site metasploit.com

This Metasploit module exploits an issue in Chrome version 73.0.3683.86 (64 bit). The exploit corrupts the length of a float in order to modify the backing store of a typed array. The typed array can then be used to read and write arbitrary memory. The exploit then uses WebAssembly in order to allocate a region of RWX memory, which is then replaced with the payload. The payload is executed within the sandboxed renderer process, so the browser must be run with the --no-sandbox option for the payload to work correctly.

tags | exploit, arbitrary
advisories | CVE-2019-5825
SHA-256 | 52e7894b7c0f12d602e2b66b2ab86b9e0c4591cd171e7e1ab5ee86c354cbe687
Google Chrome 67 / 68 / 69 Object.create Type Confusion
Posted Mar 5, 2020
Authored by saelo, timwr | Site metasploit.com

This Metasploit modules exploits a type confusion in Google Chrome's JIT compiler. The Object.create operation can be used to cause a type confusion between a PropertyArray and a NameDictionary. The payload is executed within the rwx region of the sandboxed renderer process, so the browser must be run with the --no-sandbox option for the payload to work.

tags | exploit
advisories | CVE-2018-17463
SHA-256 | 5a38c9abffbaf08c049cb1b58519cd4edf1737251883302e32656d4b4f6eadc6
Google Chrome 80 JSCreate Side-Effect Type Confusion
Posted Mar 5, 2020
Authored by Clement LECIGNE, timwr, Istvan Kurucsai, Vignesh S Rao | Site metasploit.com

This Metasploit module exploits an issue in Google Chrome version 80.0.3987.87 (64 bit). The exploit corrupts the length of a float array (float_rel), which can then be used for out of bounds read and write on adjacent memory. The relative read and write is then used to modify a UInt64Array (uint64_aarw) which is used for read and writing from absolute memory. The exploit then uses WebAssembly in order to allocate a region of RWX memory, which is then replaced with the payload shellcode. The payload is executed within the sandboxed renderer process, so the browser must be run with the --no-sandbox option for the payload to work correctly.

tags | exploit, shellcode
advisories | CVE-2020-6418
SHA-256 | a5ee5e57a9ca7e2030588e33fb91d4f11725ab4661382274202790f8a15b4fc7
Android Binder Use-After-Free
Posted Feb 24, 2020
Authored by Jann Horn, timwr, Maddie Stone, grant-h | Site metasploit.com

Android Binder use-after-free exploit.

tags | exploit
advisories | CVE-2019-2215
SHA-256 | 8311b9bec91595d2878834472570bf80e596b211d30a53cac581c4c7c5478c85
Android Janus APK Signature Bypass
Posted Nov 7, 2019
Authored by h00die, timwr, V-E-O, GuardSquare | Site metasploit.com

This Metasploit module exploits CVE-2017-13156 in Android to install a payload into another application. The payload APK will have the same signature and can be installed as an update, preserving the existing data. The vulnerability was fixed in the 5th December 2017 security patch, and was additionally fixed by the APK Signature scheme v2, so only APKs signed with the v1 scheme are vulnerable. Payload handler is disabled, and a multi/handler must be started first.

tags | exploit
advisories | CVE-2017-13156
SHA-256 | 07dfdc4313d8080e07f5b2661f0494022dcf8b3a5afcb2da795fd921a4b33c84
Linux Polkit pkexec Helper PTRACE_TRACEME Local Root
Posted Oct 23, 2019
Authored by Brendan Coles, Jann Horn, timwr | Site metasploit.com

This Metasploit module exploits an issue in ptrace_link in kernel/ptrace.c before Linux kernel 5.1.17. This issue can be exploited from a Linux desktop terminal, but not over an SSH session, as it requires execution from within the context of a user with an active Polkit agent. In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to create a ptrace relationship, which allows local users to obtain root access by leveraging certain scenarios with a parent-child process relationship, where a parent drops privileges and calls execve (potentially allowing control by an attacker). One contributing factor is an object lifetime issue (which can also cause a panic). Another contributing factor is incorrect marking of a ptrace relationship as privileged, which is exploitable through (for example) Polkit's pkexec helper with PTRACE_TRACEME.

tags | exploit, kernel, local, root
systems | linux
advisories | CVE-2019-13272
SHA-256 | 072effef6153caac38d664913a4c85d900178cc8a6bc497726bd11fee5a2a0bc
Microsoft Windows 10 UAC Protection Bypass Via Windows Store
Posted Sep 6, 2019
Authored by timwr, sailay1996, ACTIVELabs | Site metasploit.com

This Metasploit module exploits a flaw in the WSReset.exe Windows Store Reset Tool. The tool is run with the "autoElevate" property set to true, however it can be moved to a new Windows directory containing a space (C:\Windows \System32\) where, upon execution, it will load our payload dll (propsys.dll).

tags | exploit
systems | windows
SHA-256 | 5772d80c89ffdf34ee4b98d8439e444a0c17923e2cae393bbe2593bcae61ffd4
Mac OS X TimeMachine (tmdiagnose) Command Injection Privilege Escalation
Posted Jul 1, 2019
Authored by timwr, CodeColorist | Site metasploit.com

This Metasploit module exploits a command injection in TimeMachine on macOS <= 10.14.3 in order to run a payload as root. The tmdiagnose binary on OSX <= 10.14.3 suffers from a command injection vulnerability that can be exploited by creating a specially crafted disk label. The tmdiagnose binary uses awk to list every mounted volume, and composes shell commands based on the volume labels. By creating a volume label with the backtick character, we can have our own binary executed with root privileges.

tags | exploit, shell, root
systems | apple
advisories | CVE-2019-8513
SHA-256 | 7eb0567032fbb9cfa6bb44edac50bb3c598c094fd089f1288cc6d474ba8add57
Mac OS X Feedback Assistant Race Condition
Posted May 22, 2019
Authored by timwr, CodeColorist | Site metasploit.com

This Metasploit module exploits a race condition vulnerability in Mac's Feedback Assistant. A successful attempt would result in remote code execution under the context of root.

tags | exploit, remote, root, code execution
advisories | CVE-2019-8565
SHA-256 | 177b5b62a07b473da68dffff7f74c282ae90ad2e298981c9578046603f9e403a
Chrome 72.0.3626.119 FileReader Use-After-Free
Posted May 8, 2019
Authored by Clement LECIGNE, timwr, Istvan Kurucsai | Site metasploit.com

This exploit takes advantage of a use after free vulnerability in Google Chrome 72.0.3626.119 running on Windows 7 x86. The FileReader.readAsArrayBuffer function can return multiple references to the same ArrayBuffer object, which can be freed and overwritten with sprayed objects. The dangling ArrayBuffer reference can be used to access the sprayed objects, allowing arbitrary memory access from Javascript. This is used to write and execute shellcode in a WebAssembly object. The shellcode is executed within the Chrome sandbox, so you must explicitly disable the sandbox for the payload to be successful.

tags | exploit, arbitrary, x86, javascript, shellcode
systems | windows
advisories | CVE-2019-5786
SHA-256 | 60039dc761905e4a2ed93286404ec19777dfd73ef434ef8a80431ab28e2ebbc1
WebKit not_number defineProperties Use-After-Free
Posted Jun 4, 2018
Authored by timwr, qwertyoruiop, Siguza, tihmstar | Site metasploit.com

This Metasploit module exploits a use-after-free vulnerability in WebKit's JavaScriptCore library.

tags | exploit
advisories | CVE-2016-4655, CVE-2016-4656, CVE-2016-4657
SHA-256 | e0baf08d0593f705fb8158e36e5ab1b2b1b43896b0acaaa4c81e4d5a9f019f9d
Android get_user/put_user Exploit
Posted Dec 26, 2016
Authored by timwr, fi01, cubeundcube | Site metasploit.com

This Metasploit module exploits a missing check in the get_user and put_user API functions in the linux kernel before 3.5.5. The missing checks on these functions allow an unprivileged user to read and write kernel memory. This exploit first reads the kernel memory to identify the commit_creds and ptmx_fops address, then uses the write primitive to execute shellcode as uid 0. The exploit was first discovered in the wild in the vroot rooting application.

tags | exploit, kernel, root, shellcode
systems | linux
advisories | CVE-2013-6282
SHA-256 | eac5456bcf0ec583938479375c419cbd5715505092e66d61115ffa99e92b6015
Android Futex Requeue Kernel Exploit
Posted Feb 9, 2015
Authored by timwr, geohot, Pinkie Pie | Site metasploit.com

This Metasploit module exploits a bug in futex_requeue in the linux kernel. Any android phone with a kernel built before June 2014 should be vulnerable.

tags | exploit, kernel
systems | linux
advisories | CVE-2014-3153
SHA-256 | edb509825e7088dfdc443f8f8613f34f0bee062721bb567b7808210b3962498c
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