#VU17708 Use-after-free in libpng - CVE-2019-7317

Vulnerability identifier: #VU17708

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-7317

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libpng
Universal components / Libraries / Libraries used by multiple products

Vendor: libpng

Description

The vulnerability allows a remote attacker to cause DoS condition.

The vulnerability exists due to a use-after-free memory error in the png_image_free function, as defined in the png.c source code file when calling on png_safe_execute. A remote attacker can send specially crafted data, trigger a call on png_safe_execute and trigger memory corruption, resulting in a DoS condition.

Mitigation
Update to the latest version.

Vulnerable software versions

libpng: 1.6.36

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External links
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12803
https://github.com/glennrp/libpng/issues/275

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.