#VU27976 Out-of-bounds read in FreeRDP - CVE-2020-11049

Vulnerability identifier: #VU27976

Vulnerability risk: High

CVSSv4.0: 6.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-11049

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FreeRDP
Universal components / Libraries / Libraries used by multiple products

Vendor: FreeRDP

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in "rdp_read_share_control_header". A remote attacker can trigger out-of-bounds read error and read contents of memory on the system or cause a denial of service condition.

Note: This vulnerability afffects versions greater than 1.1

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeRDP: before 2.0.0

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External links
https://github.com/FreeRDP/FreeRDP/commit/c367f65d42e0d2e1ca248998175180aa9c2eacd0
https://github.com/FreeRDP/FreeRDP/issues/6008
https://github.com/FreeRDP/FreeRDP/pull/6019
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-wwh7-r2r8-xjpr

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.