ASA-202006-10 log original external raw

[ASA-202006-10] intel-ucode: information disclosure
Arch Linux Security Advisory ASA-202006-10 ========================================== Severity: High Date : 2020-06-13 CVE-ID : CVE-2020-0543 CVE-2020-0548 CVE-2020-0549 Package : intel-ucode Type : information disclosure Remote : No Link : https://security.archlinux.org/AVG-1187 Summary ======= The package intel-ucode before version 20200609-1 is vulnerable to information disclosure. Resolution ========== Upgrade to 20200609-1. # pacman -Syu "intel-ucode>=20200609-1" The problems have been fixed upstream in version 20200609. Workaround ========== None. Description =========== - CVE-2020-0543 (information disclosure) A new domain bypass transient execution attack known as Special Register Buffer Data Sampling (SRBDS) has been found. This flaw allows data values from special internal registers to be leaked by an attacker able to execute code on any core of the CPU. An unprivileged, local attacker can use this flaw to infer values returned by affected instructions known to be commonly used during cryptographic operations that rely on uniqueness, secrecy, or both. - CVE-2020-0548 (information disclosure) A flaw was found in Intel processors where a local attacker is able to gain information about registers used for vector calculations by observing register states from other processes running on the system. This results in a race condition where store buffers, which were not cleared, could be read by another process or a CPU sibling. The highest threat from this vulnerability is data confidentiality where an attacker could read arbitrary data as it passes through the processor. - CVE-2020-0549 (information disclosure) A microarchitectural timing flaw was found on some Intel processors. A corner case exists where data in-flight during the eviction process can end up in the “fill buffers” and not properly cleared by the MDS mitigations. The fill buffer contents (which were expected to be blank) can be inferred using MDS or TAA style attack methods to allow a local attacker to infer fill buffer values. Impact ====== A local unprivileged attacker with access to an affected CPU can read protected memory through a shared buffer on an SGX enclave or CPU core. References ========== https://software.intel.com/security-software-guidance/insights/deep-dive-special-register-buffer-data-sampling https://blogs.intel.com/technology/2020/06/ipas-security-advisories-for-june-2020/#gs.6uyhri https://cacheoutattack.com/CacheOut.pdf https://software.intel.com/security-software-guidance/software-guidance/l1d-eviction-sampling https://blogs.intel.com/technology/2020/01/ipas-intel-sa-00329/ https://access.redhat.com/solutions/l1d-cache-eviction-and-vector-register-sampling https://security.archlinux.org/CVE-2020-0543 https://security.archlinux.org/CVE-2020-0548 https://security.archlinux.org/CVE-2020-0549

[ASA-202006-10] intel-ucode: information disclosure

Arch Linux Security Advisory ASA-202006-10 ========================================== Severity: High Date : 2020-06-13 CVE-ID : CVE-2020-0543 CVE-2020-0548 CVE-2020-0549 Package : intel-ucode Type : information disclosure Remote : No Link : https://security.archlinux.org/AVG-1187 Summary ======= The package intel-ucode before version 20200609-1 is vulnerable to information disclosure. Resolution ========== Upgrade to 20200609-1. # pacman -Syu "intel-ucode>=20200609-1" The problems have been fixed upstream in version 20200609. Workaround ========== None. Description =========== - CVE-2020-0543 (information disclosure) A new domain bypass transient execution attack known as Special Register Buffer Data Sampling (SRBDS) has been found. This flaw allows data values from special internal registers to be leaked by an attacker able to execute code on any core of the CPU. An unprivileged, local attacker can use this flaw to infer values returned by affected instructions known to be commonly used during cryptographic operations that rely on uniqueness, secrecy, or both. - CVE-2020-0548 (information disclosure) A flaw was found in Intel processors where a local attacker is able to gain information about registers used for vector calculations by observing register states from other processes running on the system. This results in a race condition where store buffers, which were not cleared, could be read by another process or a CPU sibling. The highest threat from this vulnerability is data confidentiality where an attacker could read arbitrary data as it passes through the processor. - CVE-2020-0549 (information disclosure) A microarchitectural timing flaw was found on some Intel processors. A corner case exists where data in-flight during the eviction process can end up in the “fill buffers” and not properly cleared by the MDS mitigations. The fill buffer contents (which were expected to be blank) can be inferred using MDS or TAA style attack methods to allow a local attacker to infer fill buffer values. Impact ====== A local unprivileged attacker with access to an affected CPU can read protected memory through a shared buffer on an SGX enclave or CPU core. References ========== https://software.intel.com/security-software-guidance/insights/deep-dive-special-register-buffer-data-sampling https://blogs.intel.com/technology/2020/06/ipas-security-advisories-for-june-2020/#gs.6uyhri https://cacheoutattack.com/CacheOut.pdf https://software.intel.com/security-software-guidance/software-guidance/l1d-eviction-sampling https://blogs.intel.com/technology/2020/01/ipas-intel-sa-00329/ https://access.redhat.com/solutions/l1d-cache-eviction-and-vector-register-sampling https://security.archlinux.org/CVE-2020-0543 https://security.archlinux.org/CVE-2020-0548 https://security.archlinux.org/CVE-2020-0549