CVE-2023-26991 - Use After Free

Severity

78%

Complexity

18%

Confidentiality

98%

SWFTools v0.9.2 was discovered to contain a stack-use-after-scope in the swf_ReadSWF2 function in lib/rfxswf.c.

CVSS 3.1 Base Score 7.8. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

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 1 year ago

2023-04-04 15:15:00

Last updated 1 year ago

2023-04-11 17:57:00

Affected Software

SWFTools 0.9.2

0.9.2

References

https://github.com/matthiaskramm/swftools/issues/196

https://github.com/matthiaskramm/swftools/issues/196

Exploit, Issue Tracking, Third Party Advisory

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