Skip to content
Noroxi
NVD / CVE Program· CNA mitre

CVE-2020-13398: An issue was discovered in FreeRDP before 2.1.1.

Noroxi assessment

Priority: Monitor (action score 34/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.3% (FIRST EPSS); higher than 83.6% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: freerdp (Alpine:v3.12) 2.0.0-r1; freerdp2 (Alpine:v3.22) 2.0.0-r1; freerdp2 (Debian:12) 2.1.1+dfsg1-1.

Low priority for now. Upgrade to freerdp (Alpine:v3.12) 2.0.0-r1; freerdp2 (Alpine:v3.22) 2.0.0-r1; freerdp2 (Debian:12) 2.1.1+dfsg1-1 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

An issue was discovered in FreeRDP before 2.1.1. An out-of-bounds (OOB) write vulnerability has been detected in crypto_rsa_common in libfreerdp/crypto/crypto.c.

HighCVSS 8.3 · v3.1—Proof of concept Fix available
Published
May 22, 2020
Updated
Jun 16, 2026
EPSS
2.3% · 83th percentile

Report tools

JSON

Action score

34

Monitor

Low priority for now.

CVSS
33 / 40 · 8.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.3%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-13398

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for freerdp records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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 help

Affected 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.

VendorProduct
freerdpfreerdp
canonicalubuntu linux
debiandebian linux
opensuseleap

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • canonical ubuntu linux16.04
  • canonical ubuntu linux18.04
  • canonical ubuntu linux19.10
  • canonical ubuntu linux20.04
  • debian debian linux10.0
  • debian debian linux9.0
  • freerdp freerdpbefore 2.1.1
  • opensuse leap15.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.12freerdpbefore 2.0.0-r12.0.0-r1
Alpine:v3.22freerdp2before 2.0.0-r12.0.0-r1
Debian:12freerdp2before 2.1.1+dfsg1-12.1.1+dfsg1-1
Debian:9freerdpbefore 1.1.0~git20140921.1.440916e+dfsg1-13+deb9u41.1.0~git20140921.1.440916e+dfsg1-13+deb9u4
Red Hat:enterprise_linux:6::clientfreerdpbefore 0:1.0.2-7.el6_100:1.0.2-7.el6_10
Red Hat:enterprise_linux:6::clientfreerdp-debuginfobefore 0:1.0.2-7.el6_100:1.0.2-7.el6_10
Red Hat:enterprise_linux:6::clientfreerdp-develbefore 0:1.0.2-7.el6_100:1.0.2-7.el6_10
Red Hat:enterprise_linux:6::clientfreerdp-libsbefore 0:1.0.2-7.el6_100:1.0.2-7.el6_10
Red Hat:enterprise_linux:6::clientfreerdp-pluginsbefore 0:1.0.2-7.el6_100:1.0.2-7.el6_10
Red Hat:enterprise_linux:7::clientfreerdpbefore 0:2.0.0-4.rc4.el7_8.10:2.0.0-4.rc4.el7_8.1
Red Hat:enterprise_linux:7::clientfreerdp-debuginfobefore 0:2.0.0-4.rc4.el7_8.10:2.0.0-4.rc4.el7_8.1
Red Hat:enterprise_linux:7::clientfreerdp-develbefore 0:2.0.0-4.rc4.el7_8.10:2.0.0-4.rc4.el7_8.1
Red Hat:enterprise_linux:7::clientfreerdp-libsbefore 0:2.0.0-4.rc4.el7_8.10:2.0.0-4.rc4.el7_8.1
Red Hat:enterprise_linux:7::clientlibwinprbefore 0:2.0.0-4.rc4.el7_8.10:2.0.0-4.rc4.el7_8.1
Red Hat:enterprise_linux:7::clientlibwinpr-develbefore 0:2.0.0-4.rc4.el7_8.10:2.0.0-4.rc4.el7_8.1
Red Hat:enterprise_linux:8::appstreamfreerdpbefore 2:2.0.0-46.rc4.el8_2.22:2.0.0-46.rc4.el8_2.2
Red Hat:enterprise_linux:8::appstreamfreerdp-debuginfobefore 2:2.0.0-46.rc4.el8_2.22:2.0.0-46.rc4.el8_2.2
Red Hat:enterprise_linux:8::appstreamfreerdp-debugsourcebefore 2:2.0.0-46.rc4.el8_2.22:2.0.0-46.rc4.el8_2.2
Red Hat:enterprise_linux:8::appstreamfreerdp-libsbefore 2:2.0.0-46.rc4.el8_2.22:2.0.0-46.rc4.el8_2.2
Red Hat:enterprise_linux:8::appstreamfreerdp-libs-debuginfobefore 2:2.0.0-46.rc4.el8_2.22:2.0.0-46.rc4.el8_2.2
Red Hat:enterprise_linux:8::appstreamlibwinprbefore 2:2.0.0-46.rc4.el8_2.22:2.0.0-46.rc4.el8_2.2
Red Hat:enterprise_linux:8::appstreamlibwinpr-debuginfobefore 2:2.0.0-46.rc4.el8_2.22:2.0.0-46.rc4.el8_2.2
Red Hat:enterprise_linux:8::appstreamlibwinpr-develbefore 2:2.0.0-46.rc4.el8_2.22:2.0.0-46.rc4.el8_2.2
Red Hat:enterprise_linux:8::crbfreerdp-develbefore 2:2.0.0-46.rc4.el8_2.22:2.0.0-46.rc4.el8_2.2

+17

Same product

freerdp: all records

Other 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_Decompress
    42Plan
  • 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 co
    41Plan
  • 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-2020-13396May 22, 2020 · An issue was discovered in FreeRDP before 2.1.1.
    29Monitor
  • ← EarlierCVE-2020-13397May 22, 2020 · An issue was discovered in FreeRDP before 2.1.1.
    22Monitor
  • Later →CVE-2020-11017May 29, 2020 · Double free in cliprdr_server_receive_capabilities in FreeRDP
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:freerdp2.0.0-r1 · Alpine:v3.12Package registry (OSV)
alpine:freerdp22.0.0-r1 · Alpine:v3.22Package registry (OSV)
debian:freerdp1.1.0~git20140921.1.440916e+dfsg1-13+deb9u4 · Debian:9Package registry (OSV)
debian:freerdp22.1.1+dfsg1-1 · Debian:12Package registry (OSV)
red hat:freerdp0:2.0.0-4.rc4.el7_8.1 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:freerdp-debuginfo0:2.0.0-4.rc4.el7_8.1 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:freerdp-debugsource2:2.0.0-46.rc4.el8_2.2 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:freerdp-devel0:2.0.0-4.rc4.el7_8.1 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:freerdp-libs0:2.0.0-4.rc4.el7_8.1 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:freerdp-libs-debuginfo2:2.0.0-46.rc4.el8_2.2 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:freerdp-plugins0:1.0.2-7.el6_10 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:libwinpr0:2.0.0-4.rc4.el7_8.1 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:libwinpr-debuginfo2:2.0.0-46.rc4.el8_2.2 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:libwinpr-devel0:2.0.0-4.rc4.el7_8.1 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:12025-05-25

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.

  1. Published
  2. First PoC+1828 d
  3. TodayNov 10, 2026+2363 d

No history yet (it accumulates with the daily EPSS job).

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 researchers

Finders, 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.
  • A low-privileged account is enough.
  • 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
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
Low

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

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

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records