CVE-2023-0045

Linux에서 Spectre-BTI 사용자 공간 완화 우회하기 이 문서는 작업 중인 문서입니다. 잘못된 점이 있거나 인용을 놓친 경우 피드백을 보내주세요. 버전 1.0 José Oliveira esoj Rodrigo Branco BSDaemon 소개 Spectre-BTI 공격의 성공률을 테스트하던 중, 커널 API를 완화 조치로 사용할 때 이상한 패턴을 발견했습니다^1. 테스트 결과, 리눅스 커널이 공격을 제대로 완화하지 못하여 시스템 콜 후 짧은 시간 동안 프로세스가 노출되는 것으로 나타났습니다. 추가 조사 결과, 커널이 시...

CVE-2023-0045

Linux에서 Spectre-BTI 사용자 공간 완화 우회하기 작업 중인 문서입니다. 잘못된 내용이 있거나 누락된 인용이 있다면 피드백을 보내주세요 버전 1.0 José Oliveira esoj Rodrigo Branco BSDaemon 소개 Spectre-BTI 공격의 성공률을 테스트하던 중, 커널 API를 완화 수단으로 사용할 때 이상한 패턴을 발견했습니다^1. 테스트 결과 Linux 커널이 공격을 올바르게 완화하지 못하여 syscall 이후 짧은 시간 동안 프로세스가 노출된 상태로 남는 것으로 나타났습니다. 추가 조사 결...

EUVD-2023-24178

Malicious code in bioql PyPI...

kernel: Spectre v2 SMT mitigations problem

It was found that the Linux Kernel still left the victim process exposed to attacks in some cases even after enabling the spectre-BTI mitigation with prctl. The kernel failed to protect applications that attempted to protect against Spectre v2 leaving them open to attack from other processes...

Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel (Intel IoTG) vulnerabilities (USN-6207-1)

The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6207-1 advisory. It was discovered that the TUN/TAP driver in the Linux kernel did not properly initialize socket data. A local attacker could use this to cau...

CBL Mariner 2.0 Security Update: kernel (CVE-2023-1998)

The version of kernel installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2023-1998 advisory. - The Linux kernel allows userspace processes to enable mitigations by calling prctl with PRSETSPECULATIONCTRL...

SUSE SLES12: cluster-md-kmp-rt / dlm-kmp-rt / gfs2-kmp-rt / kernel-devel-rt / etc (SUSE-SU-2023:2156-1)

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:2156-1 advisory. The SUSE Linux Enterprise 12 SP5 RT kernel was updated to receive various security and bugfixes. The following security bugs were fixed: -...

SUSE SLED15: cluster-md-kmp-64kb / cluster-md-kmp-default / dlm-kmp-64kb / etc (SUSE-SU-2023:2140-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:2140-1 advisory. The SUSE Linux Enterprise 15 SP4 kernel was updated to receive various security and bugfixes. Th...

Cross site scripting

The Linux kernel allows userspace processes to enable mitigations by calling prctl with PRSETSPECULATIONCTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to...

CVE-2023-1998 Spectre v2 SMT mitigations problem in Linux kernel

The Linux kernel allows userspace processes to enable mitigations by calling prctl with PRSETSPECULATIONCTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to...

CVE-2023-1998

The Linux kernel allows userspace processes to enable mitigations by calling prctl with PRSETSPECULATIONCTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to...

CVE-2023-1998

CVE-2023-1998 affects the Linux kernel. Root cause: when using legacy IBRS, the IBRS bit is cleared on returning to userspace, disabling implicit STIBP and leaving some spectre-BTI protections ineffective; attackers on a local machine could exploit cross-thread branch target injection despite mit...

CVE-2023-1998 Spectre v2 SMT mitigations problem in Linux kernel

The Linux kernel allows userspace processes to enable mitigations by calling prctl with PRSETSPECULATIONCTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to...

CVE-2023-1998: Non-Transparent Sharing of Microarchitectural Resources

The Linux kernel allows userspace processes to enable mitigations by calling prctl with PRSETSPECULATIONCTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to...

Linux Kernel 6.2 - Userspace Processes To Enable Mitigation Exploit

Exploit Title: Linux Kernel 6.2 - Userspace Processes To Enable Mitigation Exploit Author: nu11secur1ty CVE ID: CVE-2023-1998 Description Summary The Linux kernel allows userspace processes to enable mitigations by calling prctl with PRSETSPECULATIONCTRL which disables the speculation feature as...

CVE-2023-1998

It was found that the Linux Kernel still left the victim process exposed to attacks in some cases even after enabling the spectre-BTI mitigation with prctl. The kernel failed to protect applications that attempted to protect against Spectre v2 leaving them open to attack from other processes...

CVE-2023-1998

The Linux kernel allows userspace processes to enable mitigations by calling prctl with PRSETSPECULATIONCTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to...

Amazon Linux AMI : kernel (ALAS-2023-1701)

The version of kernel installed on the remote host is prior to 4.14.309-159.529. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2023-1701 advisory. Detected a few exploitable gadgets that could leak secret memory through a side-channel such as MDS as well as...

Exploit for Externally Controlled Reference to a Resource in Another Sphere in Linux Linux_Kernel

Bypassing Spectre-BTI User Space Mitigations on Linux Th...

CVE-2023-0045

A flaw was found in the Linux kernel. This issue occurs due to a failure mitigating the Spectre-BTI attack using the kernel API, as IBPB is not issued during the syscall until the next schedule, leaving the system vulnerable. Mitigation For user-mode applications, a usleep after the prctl call wi...