32 matches found
CVE-2023-0045
绕过 Linux 上的 Spectre-BTI 用户空间缓解措施 这是一份工作文档，如果您认为我们有错误或遗漏了引用，请向我们发送反馈 版本 1.0 José Oliveira esoj Rodrigo Branco BSDaemon 引言 在测试 Spectre-BTI 攻击的成功率时，我们使用内核 API 作为缓解措施1时检测到一种异常模式。我们的测试表明，Linux 内核未能正确缓解攻击，导致进程在系统调用后短时间内仍处于暴露状态。 进一步调查显示，内核在系统调用期间并未立即发出 IBPB。ibprctlset2 函数更新任务的线程信息标志 TIF 并在...
CVE-2023-0045
Bypassing Spectre-BTI User Space Mitigations on Linux This is a working document, please send us feedback if you think we got something wrong or if we missed a citation Version 1.0 José Oliveira esoj Rodrigo Branco BSDaemon Introduction When testing the success rate of Spectre-BTI attacks, we...
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
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
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...
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...