SB2019100406 - Multiple vulnerabilities in FreeRDP and LodePNG

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Memory leak (CVE-ID: CVE-2019-17177)

The vulnerability allows a remote attacker to perform denial of service (DoS) attack.

The vulnerability exists due memory leak in "libfreerdp/codec/region.c" file when a supplied realloc pointer (i.e., the first argument to realloc) is also used for a realloc return value. A remote attacker can cause a denial of service condition on the target system.

2) Memory leak (CVE-ID: CVE-2019-17178)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due memory leak in "HuffmanTree_makeFromFrequencies" in "lodepng.c" in LodePNG, as used in WinPR in FreeRDP because a supplied realloc pointer (i.e., the first argument to realloc) is also used for a realloc return value. A remote attacker can cause a denial of service condition on the target system.

Remediation

Install update from vendor's website.

References

• https://github.com/akallabeth/FreeRDP/commit/fc80ab45621bd966f70594c0b7393ec005a94007
• https://github.com/FreeRDP/FreeRDP/issues/5645