rdesktop versions up to and including v1.8.3 contain a Heap-Based Buffer Overflow in function cssp_read_tsrequest() that results in a memory
rdesktop versions up to and including v1.8.3 contain a Heap-Based Buffer Overflow in function cssp_read_tsrequest() that results in a memory corruption and probably even a remote code execution.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Feb 5, 2019
- Updated
- Jun 16, 2026
- EPSS
- 7.1% · 94th percentile
- CWE
- CWE-122
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Report tools
Action score
41
Plan
Add it to your regular patch cycle.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 2 / 30 · 7.1%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| rdesktop | rdesktop | cpe:2.3:a:rdesktop:rdesktop |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| opensuse | leap | cpe:2.3:o:opensuse:leap |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux8.0
- debian debian linux9.0
- opensuse leap15.1
- rdesktop rdesktopup to 1.8.3 inclusive
Versions reported by the vendor
Affected version ranges reported by the assigning authority (checkpoint). Independent of NVD's CPE analysis and usually ahead of it.
Check Point Software Technologies Ltd. rdesktop
- All versions up to and including v1.8.3affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.10 | rdesktop | before 1.8.6-r0 | 1.8.6-r0 |
| Debian:12 | rdesktop | before 1.8.4-1 | 1.8.4-1 |
| Debian:8 | rdesktop | before 1.8.4-0+deb8u1 | 1.8.4-0+deb8u1 |
| Debian:9 | rdesktop | before 1.8.4-1~deb9u1 | 1.8.4-1~deb9u1 |
| openSUSE:Tumbleweed | rdesktop | before 1.9.0-4.6 | 1.9.0-4.6 |
| SUSE:Package Hub 15 SP1 | rdesktop | before 1.8.6-bp151.2.3.1 | 1.8.6-bp151.2.3.1 |
| SUSE:Package Hub 15 SP1 | rdesktop | before 1.8.6-bp151.2.3.1 | 1.8.6-bp151.2.3.1 |
Same product
rdesktop: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-20182rdesktop versions up to and including v1.8.3 contain a Buffer Overflow over the global variables in the function seamless_process_line() tha41Plan
- CVE-2018-20181rdesktop versions up to and including v1.8.3 contain an Integer Underflow that leads to a Heap-Based Buffer Overflow in the function seamles41Plan
- CVE-2018-20180rdesktop versions up to and including v1.8.3 contain an Integer Underflow that leads to a Heap-Based Buffer Overflow in the function rdpsndd41Plan
- CVE-2018-20179rdesktop versions up to and including v1.8.3 contain an Integer Underflow that leads to a Heap-Based Buffer Overflow in the function lspci_p41Plan
- CVE-2018-20177rdesktop versions up to and including v1.8.3 contain an Integer Overflow that leads to a Heap-Based Buffer Overflow in the function rdp_in_u41Plan
- CVE-2018-8800rdesktop versions up to and including v1.8.3 contain a Heap-Based Buffer Overflow in function ui_clip_handle_data() that results in a memory41Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| alpine:rdesktop | 1.8.6-r0 · Alpine:v3.10 | Package registry (OSV) |
| debian:rdesktop | 1.8.4-1 · Debian:12 | Package registry (OSV) |
| opensuse:rdesktop | 1.8.6-bp151.2.3.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| suse:rdesktop | 1.8.6-bp151.2.3.1 · SUSE:Package Hub 15 SP1 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-122 · Heap-based Buffer OverflowCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- www.securityfocus.com/bid/106938
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00040.html
- github.com/rdesktop/rdesktop/commit/4dca546d04321a610c1835010b5dad85163b65e1
- lists.debian.org/debian-lts-announce/2019/02/msg00030.html
- research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/
- security.gentoo.org/glsa/201903-06
- www.debian.org/security/2019/dsa-4394
Vendor advisories and official records. Exploit/PoC links are deliberately left out.