Integer underflow in rdesktop (Alpine package)



Published: 2019-05-28
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-20180
CWE-ID CWE-191
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Subscribe 		rdesktop (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Integer underflow

EUVDB-ID: #VU33453

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-20180

CWE-ID: CWE-191 - Integer underflow

Exploit availability: Yes

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

rdesktop versions up to and including v1.8.3 contain an Integer Underflow that leads to a Heap-Based Buffer Overflow in the function rdpsnddbg_process() and results in memory corruption and probably even a remote code execution.

Mitigation

Install update from vendor's website.

Vulnerable software versions

rdesktop (Alpine package): 1.8.3-r5

CPE2.3 External links

http://git.alpinelinux.org/aports/commit/?id=301cf3549bf6a5fbfab3f5e96ad545b6e58b3fa0


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. However, proof of concept for this vulnerability is available.



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