Vulnerability Details : CVE-2018-6307
LibVNC before commit ca2a5ac02fbbadd0a21fabba779c1ea69173d10b contains heap use-after-free vulnerability in server code of file transfer extension that can result remote code execution.
Vulnerability category: Memory CorruptionExecute code
Products affected by CVE-2018-6307
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
- cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-6307
11.38%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 93 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-6307
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
8.1
|
HIGH | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.2
|
5.9
|
NIST |
CWE ids for CVE-2018-6307
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-6307
-
https://github.com/LibVNC/libvncserver/issues/241
SECURITY: Heap use-after-free in tightvnc-filetransfer extension · Issue #241 · LibVNC/libvncserver · GitHubThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html
[SECURITY] [DLA 1617-1] libvncserver security updateMailing List;Third Party Advisory
-
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-026-libvnc-heap-use-after-free/
KLCERT-18-026: LibVNC Heap Use-After-Free | Kaspersky Lab ICS CERTThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
[SECURITY] [DLA 1979-1] italc security update
-
https://www.debian.org/security/2019/dsa-4383
Debian -- Security Information -- DSA-4383-1 libvncserverThird Party Advisory
-
https://usn.ubuntu.com/3877-1/
USN-3877-1: LibVNCServer vulnerabilities | Ubuntu security noticesThird Party Advisory
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