CVE-2018-8786: canonical ubuntu_linux Integer Overflow to Buffer Overflow
CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2018-8786DEBIAN-CVE-2018-8786
Published 29-11-2018Last modified 17-09-2024
Vulnerability summary
CVE-2018-8786 is a critical (CVSS 9.8) Integer Overflow to Buffer Overflow vulnerability in canonical ubuntu_linux. EPSS estimates a 8.16% chance of exploitation in the next 30 days, higher than 94.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
8.16%
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 9 · Related 6Timeline
- 29-11-2018PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
FreeRDP prior to version 2.0.0-rc4 contains an Integer Truncation that leads to a Heap-Based Buffer Overflow in function update_read_bitmap_update() and results in a memory corruption and probably even a remote code execution.
CVSS metrics
5 scores · 3 sources · 3 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 3 agree
- 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
Critical 9.8Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
8.16%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
0.00 pp
From 8.16% on 19-09-2026
19-09-202619-10-2026
EPSS score8.16%
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-680Integer Overflow to Buffer OverflowThe product performs a calculation to determine how much memory to allocate, but an integer overflow can occur that causes less memory to be allocated than expected, leading to a buffer overflow.
- CWE-681Incorrect Conversion between Numeric TypesWhen converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur.
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Redhat6 products
- enterprise_linux_desktop7.0
- enterprise_linux_server7.0
- enterprise_linux_server_aus7.6
- enterprise_linux_server_eus7.6
- enterprise_linux_server_tus7.6
Debian2 products
- freerdp2< 2.0.0~git20181120.1.e21b72c95+dfsg1-1
- debian_linuxEOL8.0
Ubuntu2 products
- freerdp< 1.0.2-2ubuntu1.2 | < 1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.3 | < 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.1
- freerdp2< 2.0.0~git20170725.1.1648deb+dfsg1-7ubuntu0.1
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 18.10
Check point software technologies ltd.1 product
- freerdpAll versions prior to 2.0.0-rc4
Fedoraproject1 product
- fedoraEOL28
Freerdp1 product
- freerdp≤ 1.2.0 | 2.0.0:rc1 | 2.0.0:rc2 | 2.0.0:rc3
7 vendors · 14 products
References
13 links
lists.debian.org/debian-lts-announce/2019/02/msg00015.htmlMailing ListX Refsource MLISTThird Party Advisory- github.com/FreeRDP/FreeRDP/commit/445a5a42c500ceb80f8fa7f2c11f3682538033f3X Refsource CONFIRMPatchVendor AdvisoryREPORT
- research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/X Refsource CONFIRMExploitThird Party Advisory