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  • May 2018 Android Security Bulletin includes additional Meltdown fix

May 2018 Android Security Bulletin includes additional Meltdown fix

Pierluigi Paganini May 09, 2018

Google releases additional Meltdown mitigations for Android as part of the May 2018 Android Security Bulletin. The tech giant also addresses flaws in NVIDIA and Qualcomm components.

Both Meltdown and Spectre attacks could be exploited by attackers to bypass memory isolation mechanisms and access target sensitive data.

The Meltdown attack (CVE-2017-5754 vulnerability) could allow attackers to read the entire physical memory of the target machines stealing credentials, personal information, and more.

The Meltdown exploits the speculative execution to breach the isolation between user applications and the operating system, in this way any application can access all system memory.

The good news is that Meltdown attacks are not easy to conduct and the risk of exploitation is considered low.

Early this year,  Google released mitigations for both Meltdown and Spectre attacks, and not delivered additional mitigations. The Meltdown mitigation was addressed along with the information disclosure flaw in USB driver tracked as CVE-2017-16643.

“The most severe vulnerability in this section [Kernel components] could enable a local malicious application to bypass operating system protections that isolate application data from other applications,” reads the security advisory published by Google.

The May 2018 Android Security Bulletin is composed of two parts, the first one being the 2018-05-01 security patch level, that addresses seven High severity issues (CVE-2017-13309, CVE-2017-13310, CVE-2017-13311, CVE-2017-13312, CVE-2017-13313, CVE-2017-13314, CVE-2017-13315) in Android runtime, Framework, Media framework, and System.

The flaws addressed in the 2018-05-01 security patch level include Information Disclosure, Elevation of Privilege, and Denial of Service that affects Android 6.0, 6.0.1, 7.0, 7.1.1, 7.1.2, 8.0, and 8.1 releases.

The second section is the “2018-05-05 security patch level vulnerability details” that includes details for each of the security vulnerabilities that apply to the 2018-05-05 patch level.

The 2018-05-05 security patch level includes patches for security vulnerabilities affecting NVIDIA and Qualcomm components.

Three vulnerabilities that were fixed in the NVIDIA components are CVE-2017-6289, CVE-2017-5715, CVE-2017-6293, respectively a critical elevation of privilege, an information disclosure and an elevation of privilege ranked as High risk.

“The most severe vulnerability in this section could enable a local malicious application to execute arbitrary code within the context of the TEE.” continues the advisory.

Google addressed 11 vulnerabilities in Qualcomm components, including a Critical remote code execution flaw that could be exploited by an attacker over WLAN. The remaining issued are 9 elevation of privilege vulnerabilities and one denial of service issue.

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Pierluigi Paganini

(Security Affairs – Android, Meltdown)

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Android Hacking May 2018 Android Security Bulletin Meltdown Pierluigi Paganini Security Affairs

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