CVE-2018-11281 - Use After Free

Severity

72%

Complexity

39%

Confidentiality

165%

In all android releases (Android for MSM, Firefox OS for MSM, QRD Android) from CAF using the linux kernel, while calling IPA_IOC_MDFY_RT_RULE IPA IOCTL, header entry is not checked before use. If IPA_IOC_MDFY_RT_RULE IOCTL called for header entries formerly deleted, a Use after free condition will occur.

In all android releases (Android for MSM, Firefox OS for MSM, QRD Android) from CAF using the linux kernel, while calling IPA_IOC_MDFY_RT_RULE IPA IOCTL, header entry is not checked before use. If IPA_IOC_MDFY_RT_RULE IOCTL called for header entries formerly deleted, a Use after free condition will occur.

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:L/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 7.2. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/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

2018-09-18 18:29:00

Last updated 6 years ago

2018-11-09 17:56:00

Affected Software

Google Android Operating System

References

https://source.android.com/security/bulletin/pixel/2018-09-01#qualcomm-components

Patch, Vendor Advisory

https://source.codeaurora.org/quic/la/kernel/msm-3.10/commit/?id=c9861d16283cb4279de98a6695e0a4e6ea0230cb

Patch, Third Party Advisory

https://source.codeaurora.org/quic/la/kernel/msm-3.18/commit/?id=4bc7311e9ea9145a615184626cc43a8b92e7619c

Patch, Third Party Advisory

https://www.codeaurora.org/security-bulletin/2018/09/04/september-2018-code-aurora-security-bulletin

Patch, Third Party Advisory

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