SB2019022844 - Fedora 28 update for freerdp, gnome-boxes, pidgin-sipe, remmina

Description

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2018-1000852)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

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

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

The vulnerability exists due to an error in channels/drdynvc/client/drdynvc_main.c, drdynvc_process_capability_request. A remote attacker can connect the rdp server with echo option and gain unauthorized access to sensitive information on the system.

2) Heap-based buffer overflow (CVE-ID: CVE-2018-8786)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

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

The vulnerability allows a remote authenticated attacker to cause DoS condition or execute arbitrary code.

The vulnerability exists due to improper handling of bitmaps by the update_read_bitmap_update() function, as defined in the update.c source code file. A remote attacker can send a specially crafted request that submits malicious input, trigger a heap-based buffer overflow condition that the attacker can use to cause a DoS condition or execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Remediation

Install update from vendor's website.

References

• https://bodhi.fedoraproject.org/updates/FEDORA-2019-b2d986c3e9