ASA-2019-00048 – rdesktop: Out-of-bounds read in function cssp_read_tsrequest()


Allele Security Alert

ASA-2019-00048

Identifier(s)

ASA-2019-00048, CVE-2018-8792

Title

Out-of-bounds read in function cssp_read_tsrequest()

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 cssp_read_tsrequest() 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-2018-8792
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8792

CVE-2018-8792
https://nvd.nist.gov/vuln/detail/CVE-2018-8792

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Last modified: February 11, 2019

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