SB2019080705 - Multiple vulnerabilities in mgetty

Description

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2019-1010190)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in the "putwhitespan()" function of mgetty in the "g3/pbm2g3.c" file. A remote attacker can create a specially crafted file, trick a victim to open it, trigger out-of-bounds read error and crash the affected application, results in a DoS condition.

2) Infinite loop (CVE-ID: CVE-2019-1010189)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to infinite loop in g3/g32pbm.c. A remote attacker can create a specially crafted file, pass it to the application and consume all available system resources and cause denial of service conditions.

Remediation

Install update from vendor's website.

References

• https://www.x41-dsec.de/lab/advisories/x41-2018-007-mgetty/
• http://mgetty.greenie.net/