PT-2019-1914 · Rdesktop+2 · Rdesktop+2

Eyal Itkin · Published 2019-01-16 · Updated 2024-06-15 · CVE-2018-20177

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 Integer Overflow in the rdp in unistr() function, which leads to a Heap-Based Buffer Overflow, resulting in memory corruption and possibly even remote code execution. This can be exploited by a remote attacker to execute arbitrary code.

Recommendations For rdesktop versions up to and including v1.8.3, consider updating to a version later than v1.8.3 to resolve the issue. As a temporary workaround, consider disabling the rdp in unistr() function until a patch is available.

Exploit

Fix

RCE

Integer Overflow

Memory Corruption

Weakness Enumeration

CWE-190

CWE-787

Related Identifiers

ALT-PU-2019-2898

ALT-PU-2020-1636

BDU:2019-01582

CVE-2018-20177

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 · 52

• 🔥 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://ubuntu.com/security/CVE-2018-20177 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-20177 · Security Note
• https://osv.dev/vulnerability/MGASA-2019-0041 · Vendor Advisory
• https://debian.org/security/2019/dsa-4394 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-20177 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-01582 · Security Note
• https://osv.dev/vulnerability/DLA-1683-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-20177 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-20177 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:11298-1 · Vendor Advisory