CVE-2020-5897 - Use After Free

Severity

88%

Complexity

27%

Confidentiality

98%

In versions 7.1.5-7.1.9, there is use-after-free memory vulnerability in the BIG-IP Edge Client Windows ActiveX component.

In versions 7.1.5-7.1.9, there is use-after-free memory vulnerability in the BIG-IP Edge Client Windows ActiveX component.

CVSS 3.1 Base Score 8.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 6.8. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P).

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 4 years ago

2020-05-12 16:15:00

Last updated 4 years ago

2020-05-14 16:54:00

Affected Software

F5 Big-IP Access Policy Manager (APM)

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