RDP client: Read of uninitialized memory with parallel port redirection
Noroxi assessment
Priority: Monitor (action score 30/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1% (FIRST EPSS); higher than 65.2% of all records.
- 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.
- Fixed version: freerdp (AlmaLinux:8) 2:2.2.0-10.el8; freerdp-devel (AlmaLinux:8) 2:2.2.0-10.el8; freerdp-libs (AlmaLinux:8) 2:2.2.0-10.el8.
- Severity is disputed: the assigning authority (CNA) scores it 3.5, NVD 7.5.
Low priority for now. Upgrade to freerdp (AlmaLinux:8) 2:2.2.0-10.el8; freerdp-devel (AlmaLinux:8) 2:2.2.0-10.el8; freerdp-libs (AlmaLinux:8) 2:2.2.0-10.el8 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
FreeRDP is a free remote desktop protocol library and clients. FreeRDP based clients on unix systems using `/parallel` command line switch might read uninitialized data and send it to the server the client is currently connected to. FreeRDP based server implementations are not affected. Please upgrade to 2.8.1 where this issue is patched. If unable to upgrade, do not use parallel port redirection (`/parallel` command line switch) as a workaround.
- Published
- Oct 12, 2022
- Updated
- Jun 17, 2026
- EPSS
- 1.0% · 65th percentile
- CWE
- CWE-908
Report tools
Action score
30
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.0%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.5
- CNA · GitHub_M
- 3.5
- 4.0 point gap
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| freerdp | freerdp | cpe:2.3:a:freerdp:freerdp |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- fedoraproject fedora35
- fedoraproject fedora36
- fedoraproject fedora37
- freerdp freerdpbefore 2.8.1
Versions reported by the vendor
Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.
FreeRDP FreeRDP
- <= 2.8.0affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | freerdp | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
| AlmaLinux:8 | freerdp-devel | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
| AlmaLinux:8 | freerdp-libs | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
| AlmaLinux:8 | libwinpr | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
| AlmaLinux:8 | libwinpr-devel | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
| AlmaLinux:9 | freerdp | before 2:2.4.1-5.el9 | 2:2.4.1-5.el9 |
| AlmaLinux:9 | freerdp-devel | before 2:2.4.1-5.el9 | 2:2.4.1-5.el9 |
| AlmaLinux:9 | freerdp-libs | before 2:2.4.1-5.el9 | 2:2.4.1-5.el9 |
| AlmaLinux:9 | libwinpr | before 2:2.4.1-5.el9 | 2:2.4.1-5.el9 |
| AlmaLinux:9 | libwinpr-devel | before 2:2.4.1-5.el9 | 2:2.4.1-5.el9 |
| Debian:10 | freerdp2 | before 2.3.0+dfsg1-2+deb10u4 | 2.3.0+dfsg1-2+deb10u4 |
| Debian:11 | freerdp2 | before 2.3.0+dfsg1-2+deb11u2 | 2.3.0+dfsg1-2+deb11u2 |
| Debian:12 | freerdp2 | before 2.8.1+dfsg1-1 | 2.8.1+dfsg1-1 |
| openSUSE:Leap 15.3 | freerdp | before 2.1.2-150200.15.21.1 | 2.1.2-150200.15.21.1 |
| openSUSE:Leap 15.4 | freerdp | before 2.4.0-150400.3.9.1 | 2.4.0-150400.3.9.1 |
| openSUSE:Tumbleweed | freerdp2 | before 2.8.1-1.1 | 2.8.1-1.1 |
| Red Hat:enterprise_linux:8::appstream | freerdp | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
| Red Hat:enterprise_linux:8::appstream | freerdp-debuginfo | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
| Red Hat:enterprise_linux:8::appstream | freerdp-debugsource | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
| Red Hat:enterprise_linux:8::appstream | freerdp-libs | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
| Red Hat:enterprise_linux:8::appstream | freerdp-libs-debuginfo | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
| Red Hat:enterprise_linux:8::appstream | libwinpr | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
| Red Hat:enterprise_linux:8::appstream | libwinpr-debuginfo | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
| Red Hat:enterprise_linux:8::appstream | libwinpr-devel | before 2:2.2.0-10.el8 | 2:2.2.0-10.el8 |
+14
Same product
freerdp: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-8787FreeRDP prior to version 2.0.0-rc4 contains an Integer Overflow that leads to a Heap-Based Buffer Overflow in function gdi_Bitmap_Decompress42Plan
- CVE-2018-8788FreeRDP prior to version 2.0.0-rc4 contains an Out-Of-Bounds Write of up to 4 bytes in function nsc_rle_decode() that results in a memory co41Plan
- CVE-2018-8786FreeRDP prior to version 2.0.0-rc4 contains an Integer Truncation that leads to a Heap-Based Buffer Overflow in function update_read_bitmap_41Plan
Published before and after this one in the same product
- ← EarlierCVE-2022-24882Apr 26, 2022 · Server side NTLM does not properly check parameters in FreeRDP31Monitor
- ← EarlierCVE-2022-24883Apr 26, 2022 · FreeRDP Server authentication might allow invalid credentials to pass40Plan
- Later →CVE-2022-39283Oct 12, 2022 · FreeRDP may read and display out of bounds data30Monitor
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 |
|---|---|---|
| almalinux:freerdp | 2:2.4.1-5.el9 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:freerdp-devel | 2:2.4.1-5.el9 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:freerdp-libs | 2:2.4.1-5.el9 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libwinpr | 2:2.4.1-5.el9 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:libwinpr-devel | 2:2.4.1-5.el9 · AlmaLinux:9 | Package registry (OSV) |
| debian:freerdp2 | 2.8.1+dfsg1-1 · Debian:12 | Package registry (OSV) |
| opensuse:freerdp | 2.1.2-150200.15.21.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:freerdp2 | 2.8.1-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:freerdp | 2:2.4.1-5.el9 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:freerdp-debuginfo | 2:2.4.1-5.el9 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:freerdp-debugsource | 2:2.4.1-5.el9 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:freerdp-devel | 2:2.4.1-5.el9 · Red Hat:enterprise_linux:9::crb | Package registry (OSV) |
| red hat:freerdp-libs | 2:2.4.1-5.el9 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:freerdp-libs-debuginfo | 2:2.4.1-5.el9 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:libwinpr | 2:2.4.1-5.el9 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:libwinpr-debuginfo | 2:2.4.1-5.el9 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:libwinpr-devel | 2:2.4.1-5.el9 · Red Hat:enterprise_linux:9::crb | Package registry (OSV) |
| rocky linux:freerdp | 2:2.2.0-10.el8 · Rocky Linux:8 | Package registry (OSV) |
| suse:freerdp | 2.1.2-150200.15.21.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP3 | 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.
No commit or PR link among the references.
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
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-908 · Use of Uninitialized ResourceCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c45q-wcpg-mxjq
- lists.debian.org/debian-lts-announce/2023/11/msg00010.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HEWWYMGWIMD4RDCOGHWMZXUMBGZHC5NW/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RLZCF7YHNC5BECDPEJNAZUYGNNM7NFME/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UDOTAOJBCZKREZJPT6VZ25GESI5T6RBG/
- security.gentoo.org/glsa/202210-24
- lists.debian.org/debian-lts-announce/2025/02/msg00016.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.