SB2019011606 - Denial of service in libpng

Description

This security bulletin contains information about 2 vulnerabilities.

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

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 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:P/U:Clear

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)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 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

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