ASA-2019-00061 – rdesktop: Out-of-bounds read in function process_demand_active()

Posted on by Allele Security Intelligence in Alerts

Allele Security Alert

ASA-2019-00061

Identifier(s)

ASA-2019-00061, CVE-2018-20178

Title

Out-of-bounds read in function process_demand_active()

Vendor(s)

rdesktop team

Product(s)

rdesktop

Affected version(s)

rdesktop versions up to and including v1.8.3

Fixed version(s)

rdesktop v1.8.4

Proof of concept

Unknown

Description

rdesktop versions up to and including v1.8.3 contain an out-of-bounds read in function process_demand_active() that results in a denial of service (segfault).

Technical details

Unknown

Credits

Eyal Itkin (Checkpoint Research)

Reference(s)

Reverse RDP Attack: Code Execution on RDP Clients
https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/

Updated ChangeLog and bumped version to 1.8.4
https://github.com/rdesktop/rdesktop/commit/34b8a18fe5d4de795851defe34b3ad3e1f43532b

CVE-2018-20178
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20178

CVE-2018-20178
https://nvd.nist.gov/vuln/detail/CVE-2018-20178

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Last modified: February 11, 2019

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