CVE-2017-7946 - Use After Free

Severity

43%

Complexity

86%

Confidentiality

48%

The get_relocs_64 function in libr/bin/format/mach0/mach0.c in radare2 1.3.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted Mach0 file.

The get_relocs_64 function in libr/bin/format/mach0/mach0.c in radare2 1.3.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted Mach0 file.

CVSS 3.0 Base Score 5.5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/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 7 years ago

2017-04-18 20:59:00

Last updated 7 years ago

2017-04-21 15:22:00

Affected Software

radare2 1.3.0

1.3.0

References

https://github.com/radare/radare2/commit/d1e8ac62c6d978d4662f69116e30230d43033c92

Issue Tracking, Patch, Third Party Advisory

https://github.com/radare/radare2/issues/7301

Issue Tracking, Patch, Third Party Advisory

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