CVE-2018-5846 - Use After Free

Severity

93%

Complexity

86%

Confidentiality

165%

A Use After Free condition can occur in the IPA driver whenever the IPA IOCTLs IPA_IOC_NOTIFY_WAN_UPSTREAM_ROUTE_ADD/IPA_IOC_NOTIFY_WAN_UPSTREAM_ROUTE_DEL/IPA_IOC_NOTIFY_WAN_EMBMS_CONNECTED are called in all Android releases from CAF (Android for MSM, Firefox OS for MSM, QRD Android) using the Linux Kernel.

A Use After Free condition can occur in the IPA driver whenever the IPA IOCTLs IPA_IOC_NOTIFY_WAN_UPSTREAM_ROUTE_ADD/IPA_IOC_NOTIFY_WAN_UPSTREAM_ROUTE_DEL/IPA_IOC_NOTIFY_WAN_EMBMS_CONNECTED are called in all Android releases from CAF (Android for MSM, Firefox OS for MSM, QRD Android) using the Linux Kernel.

CVSS 3.0 Base Score 7.8. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 9.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:C/I:C/A:C).

Demo Examples

Use After Free

CWE-416

The following example demonstrates the weakness.


               
}
free(buf3R2);

Use After Free

CWE-416

The following code illustrates a use after free error:


               
}
free(ptr);
logError("operation aborted before commit", ptr);

When an error occurs, the pointer is immediately freed. However, this pointer is later incorrectly used in the logError function.

Overview

First reported 6 years ago

2018-06-06 21:29:00

Last updated 6 years ago

2018-07-17 16:47:00

Affected Software

Google Android Operating System

References

MISC

Patch, Vendor Advisory

https://www.codeaurora.org/security-bulletin/2018/05/11/may-2018-code-aurora-security-bulletin-2

Patch, Third Party Advisory

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