ASA-2019-00057 – rdesktop: Out-of-bounds read in function ui_clip_handle_data()

Posted on by Allele Security Intelligence in Alerts

Allele Security Alert

ASA-2019-00057

Identifier(s)

ASA-2019-00057, CVE-2018-20174

Title

Out-of-bounds read in function ui_clip_handle_data()

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 ui_clip_handle_data() that results in an information leak.

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-2018-20174
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20174

CVE-2018-20174
https://nvd.nist.gov/vuln/detail/CVE-2018-20174

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Last modified: October 10, 2019

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