CVE-2017-6362 - Double Free

Severity

50%

Complexity

99%

Confidentiality

48%

Double free vulnerability in the gdImagePngPtr function in libgd2 before 2.2.5 allows remote attackers to cause a denial of service via vectors related to a palette with no colors.

Double free vulnerability in the gdImagePngPtr function in libgd2 before 2.2.5 allows remote attackers to cause a denial of service via vectors related to a palette with no colors.

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

Double Free

CWE-415

Double Free

CWE-415

While contrived, this code should be exploitable on Linux distributions which do not ship with heap-chunk check summing turned on.


               
}
free(buf1R2);

Overview

First reported 7 years ago

2017-09-07 13:29:00

Last updated 7 years ago

2017-09-13 17:46:00

Affected Software

libgd 2.2.4

2.2.4

Debian Linux 8.0 (Jessie)

8.0

Debian Linux 9.0

9.0

Fedora 26

26

Canonical Ubuntu Linux 16.04 LTS (Long-Term Support)

16.04

References

DSA-3961

Third Party Advisory

https://github.com/libgd/libgd/issues/381

Issue Tracking, Third Party Advisory

https://github.com/libgd/libgd/releases/tag/gd-2.2.5

Patch, Release Notes, Third Party Advisory

FEDORA-2017-7cc0e6a5f5

Third Party Advisory

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