SB2019011606 - Denial of service in libpng

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Memory leak (CVE-ID: CVE-2019-6129)

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in png_create_info_struct in png.c. A remote attacker can trigger memory leak and perform denial of service attack.

2) Use-after-free (CVE-ID: CVE-2019-7317)

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.

Remediation

Install update from vendor's website.

References

• https://github.com/glennrp/libpng/issues/269
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12803
• https://github.com/glennrp/libpng/issues/275