Security Vulnerabilities - CVEs Published In October 2019
An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations. There are issues with restartable PV type change operations. To avoid using shadow pagetables for PV guests, Xen exposes the actual hardware pagetables to the guest. In order to prevent the guest from modifying these page tables directly, Xen keeps track of how pages are used using a type system; pages must be "promoted" before being used as a pagetable, and "demoted" before being used for any other type. Xen also allows for "recursive" promotions: i.e., an operating system promoting a page to an L4 pagetable may end up causing pages to be promoted to L3s, which may in turn cause pages to be promoted to L2s, and so on. These operations may take an arbitrarily large amount of time, and so must be re-startable. Unfortunately, making recursive pagetable promotion and demotion operations restartable is incredibly complicated, and the code contains several races which, if triggered, can cause Xen to drop or retain extra type counts, potentially allowing guests to get write access to in-use pagetables. A malicious PV guest administrator may be able to escalate their privilege to that of the host. All x86 systems with untrusted PV guests are vulnerable. HVM and PVH guests cannot exercise this vulnerability.
CVSS Score
7.5
EPSS Score
0.02
Published
2019-10-31
An issue was discovered in Xen through 4.12.x allowing ARM guest OS users to cause a denial of service or gain privileges by leveraging the erroneous enabling of interrupts. Interrupts are unconditionally unmasked in exception handlers. When an exception occurs on an ARM system which is handled without changing processor level, some interrupts are unconditionally enabled during exception entry. So exceptions which occur when interrupts are masked will effectively unmask the interrupts. A malicious guest might contrive to arrange for critical Xen code to run with interrupts erroneously enabled. This could lead to data corruption, denial of service, or possibly even privilege escalation. However a precise attack technique has not been identified.
CVSS Score
8.8
EPSS Score
0.038
Published
2019-10-31
In Apak Wholesale Floorplanning Finance 6.31.8.3 and 6.31.8.5, an attacker can send an authenticated POST request with a malicious payload to /WFS/agreementView.faces allowing a stored XSS via the mainForm:loanNotesnotes:0:rich_text_editor_note_text parameter in the Notes section. Although versions 6.31.8.3 and 6.31.8.5 are confirmed to be affected, all versions with the vulnerable WYSIWYG editor in the Notes section are likely affected.
CVSS Score
6.1
EPSS Score
0.005
Published
2019-10-31
The malware scan function in Total Defense Anti-virus 11.5.2.28 is vulnerable to a TOCTOU bug; consequently, symbolic link attacks allow privileged files to be deleted.
CVSS Score
5.9
EPSS Score
0.003
Published
2019-10-31
The quarantine restoration function in Total Defense Anti-virus 11.5.2.28 is vulnerable to symbolic link attacks, allowing files to be written to privileged directories.
CVSS Score
5.5
EPSS Score
0.002
Published
2019-10-31
Transmission before 1.92 allows an attacker to cause a denial of service (crash) or possibly have other unspecified impact via a large number of tr arguments in a magnet link.
CVSS Score
9.8
EPSS Score
0.009
Published
2019-10-30
Transmission before 1.92 allows attackers to prevent download of a file by corrupted data during the endgame.
CVSS Score
5.3
EPSS Score
0.007
Published
2019-10-30
A cross-site scripting (XSS) vulnerability in ikiwiki before 3.20101112 allows remote attackers to inject arbitrary web script or HTML via a comment.
CVSS Score
6.1
EPSS Score
0.003
Published
2019-10-30
A missing permission check was found in The CLI in JBoss Operations Network before 2.3.1 does not properly check permissions, which allows JBoss ON users to perform management tasks and configuration changes with the privileges of the administrator user.
CVSS Score
8.0
EPSS Score
0.001
Published
2019-10-30
drbd8 allows local users to bypass intended restrictions for certain actions via netlink packets, similar to CVE-2009-3725.
CVSS Score
7.8
EPSS Score
0.0
Published
2019-10-30