A vulnerability has been found in pngcrush up to 1.7.86 and classified as problematic. This vulnerability affects some unknown processing of the file png.c of the component sPLT Chunk Structure Handler. The manipulation with an unknown input leads to a double free vulnerability. The CWE definition for the vulnerability is CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. As an impact it is known to affect availability. CVE summarizes:

Double-free vulnerability in the sPLT chunk structure and png.c in pngcrush before 1.7.87 allows attackers to have unspecified impact via unknown vectors.

The bug was discovered 10/10/2015. The weakness was disclosed 08/31/2017 (Website). The advisory is available at pmt.sourceforge.net. This vulnerability was named CVE-2015-7700 since 10/04/2015. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 122 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 88658 (Amazon Linux AMI : pngcrush (ALAS-2016-646)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170796 (OpenSUSE Security Update for pngcrush (openSUSE-SU-2018:0098-1)).

Upgrading to version 1.7.87 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (88658).

Productinfo

Name

• pngcrush

Version

• 1.7.0
• 1.7.1
• 1.7.2
• 1.7.3
• 1.7.4
• 1.7.5
• 1.7.6
• 1.7.7
• 1.7.8
• 1.7.9
• 1.7.10
• 1.7.11
• 1.7.12
• 1.7.13
• 1.7.14
• 1.7.15
• 1.7.16
• 1.7.17
• 1.7.18
• 1.7.19
• 1.7.20
• 1.7.21
• 1.7.22
• 1.7.23
• 1.7.24
• 1.7.25
• 1.7.26
• 1.7.27
• 1.7.28
• 1.7.29
• 1.7.30
• 1.7.31
• 1.7.32
• 1.7.33
• 1.7.34
• 1.7.35
• 1.7.36
• 1.7.37
• 1.7.38
• 1.7.39
• 1.7.40
• 1.7.41
• 1.7.42
• 1.7.43
• 1.7.44
• 1.7.45
• 1.7.46
• 1.7.47
• 1.7.48
• 1.7.49
• 1.7.50
• 1.7.51
• 1.7.52
• 1.7.53
• 1.7.54
• 1.7.55
• 1.7.56
• 1.7.57
• 1.7.58
• 1.7.59
• 1.7.60
• 1.7.61
• 1.7.62
• 1.7.63
• 1.7.64
• 1.7.65
• 1.7.66
• 1.7.67
• 1.7.68
• 1.7.69
• 1.7.70
• 1.7.71
• 1.7.72
• 1.7.73
• 1.7.74
• 1.7.75
• 1.7.76
• 1.7.77
• 1.7.78
• 1.7.79
• 1.7.80
• 1.7.81
• 1.7.82
• 1.7.83
• 1.7.84
• 1.7.85
• 1.7.86

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