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CVE-2019-15681

Publication date 29 October 2019

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

LibVNC commit before d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a contains a memory leak (CWE-655) in VNC server code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appear to be exploitable via network connectivity. These vulnerabilities have been fixed in commit d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a.

From the Ubuntu Security Team

Pavel Cheremushkin discovered that TightVNC has a memory leak vulnerability. An attacker could use it to disclosure sensitive information.

Status

Package Ubuntu Release Status
italc 24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.10 groovy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
Fixed 1:3.0.3+dfsg1-3ubuntu0.1
16.04 LTS xenial
Fixed 1:2.0.2+dfsg1-4ubuntu0.1
14.04 LTS trusty Not in release
krfb 24.04 LTS noble
Needs evaluation
23.10 mantic Ignored
23.04 lunar Ignored
22.10 kinetic Ignored
22.04 LTS jammy
Needs evaluation
21.10 impish Ignored
21.04 hirsute Ignored
20.10 groovy Ignored
20.04 LTS focal
Needs evaluation
19.10 eoan Ignored
19.04 disco Ignored
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty Not in release
libvncserver 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Not affected
19.10 eoan
Fixed 0.9.11+dfsg-1.3ubuntu0.1
19.04 disco Ignored
18.04 LTS bionic
Fixed 0.9.11+dfsg-1ubuntu1.2
16.04 LTS xenial
Fixed 0.9.10+dfsg-3ubuntu0.16.04.4
14.04 LTS trusty Not in release
tightvnc 24.04 LTS noble
Needs evaluation
23.10 mantic Ignored
23.04 lunar Ignored
22.10 kinetic Ignored
22.04 LTS jammy
Needs evaluation
21.10 impish Ignored
21.04 hirsute Ignored
20.10 groovy Ignored
20.04 LTS focal
Needs evaluation
19.10 eoan Ignored
19.04 disco Ignored
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
veyon 24.04 LTS noble
Needs evaluation
23.10 mantic Ignored
23.04 lunar Ignored
22.10 kinetic Ignored
22.04 LTS jammy
Needs evaluation
21.10 impish Ignored
21.04 hirsute Ignored
20.10 groovy Ignored
20.04 LTS focal
Needs evaluation
19.10 eoan Ignored
19.04 disco Ignored
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
vino 24.04 LTS noble
Fixed 3.22.0-6ubuntu1
23.10 mantic
Fixed 3.22.0-6ubuntu1
23.04 lunar
Fixed 3.22.0-6ubuntu1
22.10 kinetic
Fixed 3.22.0-6ubuntu1
22.04 LTS jammy
Fixed 3.22.0-6ubuntu1
21.10 impish
Fixed 3.22.0-6ubuntu1
21.04 hirsute
Fixed 3.22.0-6ubuntu1
20.10 groovy
Fixed 3.22.0-6ubuntu1
20.04 LTS focal
Fixed 3.22.0-5ubuntu2.1
19.10 eoan Ignored
19.04 disco Ignored
18.04 LTS bionic
Fixed 3.22.0-3ubuntu1.1
16.04 LTS xenial
Fixed 3.8.1-0ubuntu9.3
14.04 LTS trusty Not in release
x11vnc 24.04 LTS noble
Needs evaluation
23.10 mantic Ignored
23.04 lunar Ignored
22.10 kinetic Ignored
22.04 LTS jammy
Needs evaluation
21.10 impish Ignored
21.04 hirsute Ignored
20.10 groovy Ignored
20.04 LTS focal
Needs evaluation
19.10 eoan Ignored
19.04 disco Ignored
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libvncserver

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-4407-1
    • LibVNCServer vulnerabilities
    • 1 July 2020
    • USN-4547-1
    • iTALC vulnerabilities
    • 28 September 2020
    • USN-4587-1
    • iTALC vulnerabilities
    • 20 October 2020

Other references