CVE-2018-20176: rdesktop Out-of-bounds Read
CVSS: 7.5v3.0HighModified
AliasesALPINE-CVE-2018-20176UBUNTU-CVE-2018-20176DEBIAN-CVE-2018-20176
Published 15-03-2019Last modified 05-08-2024
Vulnerability summary
CVE-2018-20176 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in rdesktop. EPSS estimates a 3.60% chance of exploitation in the next 30 days, higher than 89.3% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.0 (NVD)EPSS score
3.60%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 5 · Related 2Timeline
- 15-03-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
rdesktop versions up to and including v1.8.3 contain several Out-Of- Bounds Reads in the file secure.c that result in a Denial of Service (segfault).
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
3.60%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
0.00 pp
From 3.60% on 19-09-2026
19-09-202619-10-2026
EPSS score3.60%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (research.checkpoint.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Alpine1 product
- rdesktop< 1.8.6-r0
Debian1 product
- rdesktop< 1.8.4-1
Rdesktop1 product
- rdesktop≤ 1.8.3
Ubuntu1 product
- rdesktopAll versions (No fix recorded)
4 vendors · 4 products
References
12 links- github.com/rdesktop/rdesktop/commit/4dca546d04321a610c1835010b5dad85163b65e1X Refsource MISCPatchThird Party Advisory
- research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/X Refsource CONFIRMExploitThird Party Advisory
