syzkaller

syzkaller - фаззер ядра syzkaller siːzˈkɔːlə — это неконтролируемый фаззер ядра, управляемый покрытием. Поддерживаемые ОС: FreeBSD, Fuchsia, gVisor, Linux, NetBSD, OpenBSD, Windows. Список рассылки: [email protected] присоединиться через веб или по электронной почте. Найденные ошибки:...

CVE-2022-29968

CVE-2022-29968 Exploit de preuve de concept pour CVE-2022-29968 mémoire non initialisée dans le noyau Linux, en particulier le sous-système iouring. Le crash a été découvert avec Syzkaller. Il a été analysé par Joseph Ravichandran et Michael Wang. L'exploit a été écrit par Joseph Ravichandran. No...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: kernfs: A use-after-free issue has been fixed in kernfsremove. Syzkaller managed to trigger concurrent calls to kernfsremovebynamens for the same file, resulting in a KASAN detected use-after-free. This race condition occurs...

Astra Linux – Vulnerability in Linux 5.10, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: Wifi: ath9k: htchst: In the ath9khtcrxmsg function, if there is no callback function, the provided skb is not freed. It is stated that ath9khtcrxmsg either frees the provided skb or passes its management to another callback...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: net/sched: fixed the lockdep issue in qdisctreereducebacklog The qdisctreereducebacklog function is called with the qdisc lock held, not RTNL. We must use qdisclookuprcu instead of qdisclookup. syzbot reported: WARNING:...

Astra Linux – Vulnerability in Linux 5.10, Linux, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: gtp: Fixed a use-after-free in gtpencapdestroy. syzkaller reported a use-after-free in gtpencapdestroy. The same process freed “sk” and accessed it illegally. The commit e198987e7dd7 “gtp: fix suspicious RCU usage” added...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: net: Handling of integer overflows in kmallocreserve The committed change was as follows: c ptr = kmallocsize; if ptr size = ksizeptr; size = kmallocsizeroundupsize; ptr = kmallocsize; This caused various crashes, as reported ...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: net/ipv6: avoided a possible Use After Free UAF in ip6routempathnotify syzbot discovered another use-after-free in ip6routempath Notify. 1 The commit f7225172f25a “net/ipv6: prevent use after free in ip6routempath Notify” fail...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ax25: The refcount leak caused by setting the SOBINDTODEVICE socket option has been fixed. If an AX25 device is bound to a socket by setting the SOBINDTODEVICE socket option, a refcount leak will occur in ax25release. The commit...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: In the net subsystem, hsr: rejecting HSR frames if skb cannot hold the tag. Receiving an HSR frame with insufficient space to hold the HSR tag in the skb can result in a crash kernel BUG. 45.390915 skbuff: skbunderpanic:...

CVE-2023-52927

CVE-2023-52927 LPE-эксплойт для CVE-2023-52927 — уязвимость типа use-after-free в netfilter. Мой разбор уязвимости: CVE-2023-52927 — превращение забытого отчёта Syzkaller в эксплойт для kCTF Репродуктор: KASAN trigger poc Сборка Установите зависимости: make prerequisites Соберите эксплойт: make...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: bpf: Explicitly check accesses to bpfsockaddr Syzkaller identified a kernel warning in the bpfsockaddr function: c 0: r0 = 0 1: r2 = u32 r1 + 60 2: exit This triggers the verifier bug: an error occurs during the context access...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: Squashfs: fixed an issue where uninit-value was accessed in squashfsgetparent. Syzkaller reported a bug titled “KMSAN: uninit-value in squashfsgetparent”. This issue arises when openbyhandleat is called with a file handle...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: HID: core: removed the unnecessary WARNON function in the implement function. The syzkaller triggered a warning 1 when calling implement, attempting to write a value into a field of smaller size in an output report. Since impleme...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: x86: stopped the use of stack-based calculations in the profilepc function. The profilepc function is used for timer-based profiling, which isn’t really that relevant anymore. It also makes assumptions about the stack layout that...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: Block, bfq: Fixed a potential UAF issue for bfqq-bic when using the merge chain. 1. Initial state: Three tasks: - Process 1 Process 2 Process 3 - BIC1 BIC2 BIC3 | Λ | Λ | Λ | | | | | V | V | V bfqq1 bfqq2 bfqq3 Process...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: TCP: Fixed corruption in MPTCP’s DSS due to large PMTU transmissions. Syzkaller was able to trigger DSS corruption: - TCP: requestsocksubflowv4: Possible SYN flooding on port :::20002. Sending cookies. ------------ Cut here...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: netsched: schsfq: do not allow a 1 packet limit The current implementation does not work correctly with a limit of 1 packet. iproute2 actually checks for this, and this patch adds this check as well in the kernel. This fix resolv...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: mptcp: Properly handling disconnections due to fastopen. Syzbot was able to trigger data stream corruption: WARNING: CPU: 0 PID: 9846 at net/mptcp/protocol.c:1024 mptcpcleanuna+0xddb/0xff0 net/mptcp/protocol.c:1024 Modules...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ext4: Fixed an out-of-bounds read when checking .dotdot dir. Mounting a corrupted filesystem with a directory containing a . dir entry where reclen == block size results in an out-of-bounds read later, when the corrupted director...