#VU27978 Out-of-bounds read in FreeRDP - CVE-2020-11046

Vulnerability identifier: #VU27978

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-11046

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 perform a denial of service (DoS) attack.

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

Note: This vulnerability affects versions after 1.0

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/ed53cd148f43cbab905eaa0f5308c2bf3c48cc37
https://github.com/FreeRDP/FreeRDP/issues/6006
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hx48-wmmm-mr5q

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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.