CVE-2018-5101 - Use After Free

Severity

50%

Complexity

99%

Confidentiality

48%

CVSS 3.0 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/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 6 years ago

2018-06-11 21:29:00

Last updated 6 years ago

2018-06-22 19:55:00

Affected Software

Mozilla Firefox

Canonical Ubuntu Linux 14.04 LTS (Long-Term Support)

14.04

Canonical Ubuntu Linux 16.04 LTS (Long-Term Support)

16.04

Canonical Ubuntu Linux 17.10

17.10

References

102786

Third Party Advisory, VDB Entry

1040270

Third Party Advisory, VDB Entry

https://bugzilla.mozilla.org/show_bug.cgi?id=1417661

Issue Tracking, Permissions Required

USN-3544-1

Third Party Advisory

https://www.mozilla.org/security/advisories/mfsa2018-02/

Vendor Advisory

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