PT-2019-1912 · Rdesktop+2 · Rdesktop+2

Eyal Itkin · Published 2019-01-16 · Updated 2024-06-15 · CVE-2018-20175

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions rdesktop versions up to and including v1.8.3

Description The issue is related to an out-of-bounds read in the rdesktop RDP client, specifically in the mcs.c file. This can be exploited by a remote attacker to cause a denial of service. The problem arises from integer signedness errors that lead to out-of-bounds reads, resulting in a segfault.

Recommendations For rdesktop versions up to and including v1.8.3, consider disabling the affected functionality in the mcs.c file as a temporary workaround until a patch is available. Restrict access to the rdesktop service to minimize the risk of exploitation.

Exploit

Fix

DoS

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

ALT-PU-2019-2898

ALT-PU-2020-1636

BDU:2019-01580

CVE-2018-20175

DLA-1683-1

DSA-4394-1

MGASA-2019-0041

OPENSUSE-SU-2019:2135-1

OPENSUSE-SU-2019_2135-1

OPENSUSE-SU-2024:11298-1

Affected Products

Alt Linux

Suse

Rdesktop

References · 51

• 🔥 https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients · Exploit
• https://github.com/rdesktop/rdesktop/commit/4dca546d04321a610c1835010b5dad85163b65e1 · Patch
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00040.html · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2019:2135-1 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2019-0041.html · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-20175 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-20175 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-20175 · Security Note
• https://osv.dev/vulnerability/MGASA-2019-0041 · Vendor Advisory
• https://debian.org/security/2019/dsa-4394 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-20175 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-1683-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-20175 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:11298-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-01580 · Security Note