Veracode Vulnerability DatabaseVERACODE:21795Information Disclosure
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
libvncserver.so is vulnerable to information disclosure. A memory leak in the rfbSendServerCutText function in rfbserver.c allows for an attacker to read stack memory which can be used to bypass ASLR.
References
lists.opensuse.org/opensuse-security-announce/2020-05/msg00027.html
lists.opensuse.org/opensuse-security-announce/2020-07/msg00073.html
bugzilla.suse.com/show_bug.cgi?id=1155419
cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
github.com/LibVNC/libvncserver/commit/d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a
lists.debian.org/debian-lts-announce/2019/10/msg00039.html
lists.debian.org/debian-lts-announce/2019/10/msg00042.html
lists.debian.org/debian-lts-announce/2019/11/msg00032.html
lists.debian.org/debian-lts-announce/2019/12/msg00028.html
usn.ubuntu.com/4407-1/
usn.ubuntu.com/4547-1/
usn.ubuntu.com/4573-1/
usn.ubuntu.com/4587-1/
Related
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N