CVE-2018-20177: debian debian_linux Integer Overflow or Wraparound
CVSS: 9.8v3.1CriticalModified
AliasesALPINE-CVE-2018-20177UBUNTU-CVE-2018-20177DEBIAN-CVE-2018-20177
Published 15-03-2019Last modified 05-08-2024
Vulnerability summary
CVE-2018-20177 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in debian debian_linux. EPSS estimates a 7.93% chance of exploitation in the next 30 days, higher than 94.6% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
7.93%
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 an Integer Overflow that leads to a Heap-Based Buffer Overflow in the function rdp_in_unistr() and results in memory corruption and possibly even a remote code execution.
CVSS metrics
5 scores · 4 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
7.93%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
0.00 pp
From 7.93% on 18-09-2026
18-09-202618-10-2026
EPSS score7.93%
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 cause- CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Debian2 products
- rdesktop< 1.8.4-1
- debian_linuxEOL8.0 | 9.0
Alpine1 product
- rdesktop< 1.8.6-r0
Rdesktop1 product
- rdesktop≤ 1.8.3
Ubuntu1 product
- rdesktopAll versions (No fix recorded)
5 vendors · 7 products
References
12 links- research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/X Refsource CONFIRMExploitThird Party Advisory
- lists.debian.org/debian-lts-announce/2019/02/msg00030.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00040.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory