CVE-2019-16165 - Use After Free

Severity

65%

Complexity

27%

Confidentiality

60%

GNU cflow through 1.6 has a use-after-free in the reference function in parser.c.

GNU cflow through 1.6 has a use-after-free in the reference function in parser.c.

CVSS 3.1 Base Score 6.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 4.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/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 5 years ago

2019-09-09 17:15:00

Last updated 5 years ago

2019-09-10 13:56:00

Affected Software

GNU cflow

References

https://lists.gnu.org/archive/html/bug-cflow/2019-04/msg00001.html

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