Heap-based buffer overflow in rdesktop (Alpine package)



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-8795
CWE-ID CWE-122
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) Heap-based buffer overflow

EUVDB-ID: #VU17473

Risk: High

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-8795

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

Exploit availability: Yes

Description

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

The vulnerability exists due to an integer overflow. A remote attacker can trick the victim who is using a Remote Desktop Protocol (RDP) client on a targeted system into connecting to an attacker-controlled RDP server, trigger out-of-bounds write condition in the process_bitmap_updates() function and execute arbitrary code on the target system.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

rdesktop (Alpine package): 1.6.0-r0 - 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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