SB2021071202 - Gentoo update for ConnMan

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Stack-based buffer overflow (CVE-ID: CVE-2021-26675)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within dnsproxy in ConnMan. A remote unauthenticated attacker on the local network can send specially crafted packets to the affected system, trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Memory leak (CVE-ID: CVE-2021-26676)

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

The vulnerability exists due memory leak in gdhcp in ConnMan. A remote attacker on the local network can force the application to leak sensitive stack information.

3) Stack-based buffer overflow (CVE-ID: CVE-2021-33833)

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

The vulnerability exists due to a boundary error within the dnsproxy  component in the uncompress function when unpacking NAME and RDATA/RDLENGTH fields with TYPE A/AAAA. A remote attacker can send specially crafted DNS packet to the ConnMan and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://security.gentoo.org/
• https://security.gentoo.org/glsa/202107-29