An incorrect permission check in the admin backend in gvfs before version 1.39.4 was found that allows reading and modify arbitrary files by privileged users without asking for password when no authentication agent is running. This vulnerability can be exploited by malicious programs running under privileges of users belonging to the wheel group to further escalate its privileges by modifying system files without user's knowledge. Successful exploitation requires uncommon system configuration.

The remote NewStart CGSL host, running version MAIN 6.06, has gvfs packages installed that are affected by multiple vulnerabilities:

  - An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c has race conditions     because the admin backend doesn't implement query_info_on_read/write. (CVE-2019-12448)

  - An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c mishandles file     ownership because setfsuid is not used. (CVE-2019-12447)

  - An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c mishandles a file's     user and group ownership during move (and copy with G_FILE_COPY_ALL_METADATA) operations from admin:// to     file:// URIs, because root privileges are unavailable. (CVE-2019-12449)

  - daemon/gvfsdaemon.c in gvfsd from GNOME gvfs before 1.38.3, 1.40.x before 1.40.2, and 1.41.x before 1.41.3     opened a private D-Bus server socket without configuring an authorization rule. A local attacker could     connect to this server socket and issue D-Bus method calls. (Note that the server socket only accepts a     single connection, so the attacker would have to discover the server and connect to the socket before its     owner does.) (CVE-2019-12795)

  - An incorrect permission check in the admin backend in gvfs before version 1.39.4 was found that allows     reading and modify arbitrary files by privileged users without asking for password when no authentication     agent is running. This vulnerability can be exploited by malicious programs running under privileges of     users belonging to the wheel group to further escalate its privileges by modifying system files without     user's knowledge. Successful exploitation requires uncommon system configuration. (CVE-2019-3827)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 7 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2019-4036:01 advisory.

    * gvfs: Incorrect authorization in admin backend allows privileged users to read and modify arbitrary     files without prompting for password (CVE-2019-3827)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2022:0108 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

    CVE-2018-20337:
    There is a stack-based buffer overflow in the parse_makernote function of dcraw_common.cpp in LibRaw     0.19.1. Crafted input will lead to a denial of service or possibly unspecified other impact.

    CVE-2019-3825:
    A vulnerability was discovered in gdm before 3.31.4. When timed login is enabled in configuration, an     attacker could bypass the lock screen by selecting the timed login user and waiting for the timer to     expire, at which time they would gain access to the logged-in user's session.

    CVE-2019-3827:
    An incorrect permission check in the admin backend in gvfs before version 1.39.4 was found that allows     reading and modify arbitrary files by privileged users without asking for password when no authentication     agent is running. This vulnerability can be exploited by malicious programs running under privileges of     users belonging to the wheel group to further escalate its privileges by modifying system files without     user's knowledge. Successful exploitation requires uncommon system configuration.

    CVE-2019-12447:
    An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c mishandles file     ownership because setfsuid is not used.

    CVE-2019-12448:
    An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c has race conditions     because the admin backend doesn't implement query_info_on_read/write.

    CVE-2019-12449:
    An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c mishandles a file's     user and group ownership during move (and copy with G_FILE_COPY_ALL_METADATA) operations from admin:// to     file:// URIs, because root privileges are unavailable.

    CVE-2019-12795:
    daemon/gvfsdaemon.c in gvfsd from GNOME gvfs before 1.38.3, 1.40.x before 1.40.2, and 1.41.x before 1.41.3     opened a private D-Bus server socket without configuring an authorization rule. A local attacker could     connect to this server socket and issue D-Bus method calls.(Note that the server socket only accepts a     single connection, so the attacker would have to discover the server and connect to the socket before its     owner does.)

    CVE-2019-15690:
    ** RESERVED ** This candidate has been reserved by an organization or individual that will use it when     announcing a new security problem. When the candidate has been publicized, the details for this candidate     will be provided.

    CVE-2019-20839:
    libvncclient/sockets.c in LibVNCServer before 0.9.13 has a buffer overflow via a long socket filename.

    CVE-2020-14397:
    An issue was discovered in LibVNCServer before 0.9.13. libvncserver/rfbregion.c has a NULL pointer     dereference.

    CVE-2020-14405:
    An issue was discovered in LibVNCServer before 0.9.13. libvncclient/rfbproto.c does not limit TextChat     size.

    CVE-2020-15503:
    LibRaw before 0.20-RC1 lacks a thumbnail size range check. This affects decoders/unpack_thumb.cpp,     postprocessing/mem_image.cpp, and utils/thumb_utils.cpp. For example,     malloc(sizeof(libraw_processed_image_t)+T.tlength) occurs without validating T.tlength.

    CVE-2020-25708:
    A divide by zero issue was found to occur in libvncserver-0.9.12. A malicious client could use this flaw     to send a specially crafted message that, when processed by the VNC server, would lead to a floating point     exception, resulting in a denial of service.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0108 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2018-20337:
    There is a stack-based buffer overflow in the parse_makernote function of dcraw_common.cpp in LibRaw     0.19.1. Crafted input will lead to a denial of service or possibly unspecified other impact.

    CVE-2019-3825:
    A vulnerability was discovered in gdm before 3.31.4. When timed login is enabled in configuration, an     attacker could bypass the lock screen by selecting the timed login user and waiting for the timer to     expire, at which time they would gain access to the logged-in user's session.

    CVE-2019-3827:
    An incorrect permission check in the admin backend in gvfs before version 1.39.4 was found that allows     reading and modify arbitrary files by privileged users without asking for password when no authentication     agent is running. This vulnerability can be exploited by malicious programs running under privileges of     users belonging to the wheel group to further escalate its privileges by modifying system files without     user's knowledge. Successful exploitation requires uncommon system configuration.

    CVE-2019-12447:
    An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c mishandles file     ownership because setfsuid is not used.

    CVE-2019-12448:
    An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c has race conditions     because the admin backend doesn't implement query_info_on_read/write.

    CVE-2019-12449:
    An issue was discovered in GNOME gvfs 1.29.4 through 1.41.2. daemon/gvfsbackendadmin.c mishandles a file's     user and group ownership during move (and copy with G_FILE_COPY_ALL_METADATA) operations from admin:// to     file:// URIs, because root privileges are unavailable.

    CVE-2019-12795:
    daemon/gvfsdaemon.c in gvfsd from GNOME gvfs before 1.38.3, 1.40.x before 1.40.2, and 1.41.x before 1.41.3     opened a private D-Bus server socket without configuring an authorization rule. A local attacker could     connect to this server socket and issue D-Bus method calls.(Note that the server socket only accepts a     single connection, so the attacker would have to discover the server and connect to the socket before its     owner does.)

    CVE-2019-15690:
    ** RESERVED ** This candidate has been reserved by an organization or individual that will use it when     announcing a new security problem. When the candidate has been publicized, the details for this candidate     will be provided.

    CVE-2019-20839:
    libvncclient/sockets.c in LibVNCServer before 0.9.13 has a buffer overflow via a long socket filename.

    CVE-2020-14397:
    An issue was discovered in LibVNCServer before 0.9.13. libvncserver/rfbregion.c has a NULL pointer     dereference.

    CVE-2020-14405:
    An issue was discovered in LibVNCServer before 0.9.13. libvncclient/rfbproto.c does not limit TextChat     size.

    CVE-2020-15503:
    LibRaw before 0.20-RC1 lacks a thumbnail size range check. This affects decoders/unpack_thumb.cpp,     postprocessing/mem_image.cpp, and utils/thumb_utils.cpp. For example,     malloc(sizeof(libraw_processed_image_t)+T.tlength) occurs without validating T.tlength.

    CVE-2020-25708:
    A divide by zero issue was found to occur in libvncserver-0.9.12. A malicious client could use this flaw     to send a specially crafted message that, when processed by the VNC server, would lead to a floating point     exception, resulting in a denial of service.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2019-2145 advisory.

    [1.36.2-3]
    - Force NT1 protocol version for workgroup support (#1619719)

    [1.36.2-2]
    - Prevent spawning new daemons if outgoing operation exists (#1632960)
    - CVE-2019-3827: Prevent access if any authentication agent isnt available (#1673887)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CESA-2019:1517 advisory.

  - gvfs: Incorrect authorization in admin backend allows privileged users to read and modify arbitrary files     without prompting for password (CVE-2019-3827)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has gvfs packages installed that are affected by a vulnerability:

  - An incorrect permission check in the admin backend in     gvfs before version 1.39.4 was found that allows reading     and modify arbitrary files by privileged users without     asking for password when no authentication agent is     running. This vulnerability can be exploited by     malicious programs running under privileges of users     belonging to the wheel group to further escalate its     privileges by modifying system files without user's     knowledge. Successful exploitation requires uncommon     system configuration. (CVE-2019-3827)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has gvfs packages installed that are affected by a vulnerability:

  - An incorrect permission check in the admin backend in     gvfs before version 1.39.4 was found that allows reading     and modify arbitrary files by privileged users without     asking for password when no authentication agent is     running. This vulnerability can be exploited by     malicious programs running under privileges of users     belonging to the wheel group to further escalate its     privileges by modifying system files without user's     knowledge. Successful exploitation requires uncommon     system configuration. (CVE-2019-3827)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the version of the gvfs packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - An incorrect permission check in the admin backend in     gvfs before version 1.39.4 was found that allows     reading and modify arbitrary files by privileged users     without asking for password when no authentication     agent is running. This vulnerability can be exploited     by malicious programs running under privileges of users     belonging to the wheel group to further escalate its     privileges by modifying system files without user's     knowledge. Successful exploitation requires uncommon     system configuration.(CVE-2019-3827)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

An update for gvfs is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

GVFS is the GNOME Desktop Virtual File System layer that allows users to easily access local and remote data using File Transfer Protocol (FTP), Secure Shell File Transfer Protocol (SFTP), Web Distributed Authoring and Versioning (WebDAV), Common Internet File System (CIFS), Server Message Block (SMB), and other protocols. GVFS integrates with the GNOME I/O (GIO) abstraction layer.

Security Fix(es) :

* gvfs: Incorrect authorization in admin backend allows privileged users to read and modify arbitrary files without prompting for password (CVE-2019-3827)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release Notes linked from the References section.

Security Fix(es) :

  - gvfs: Incorrect authorization in admin backend allows     privileged users to read and modify arbitrary files     without prompting for password (CVE-2019-3827)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2019:2145 advisory.

    GVFS is the GNOME Desktop Virtual File System layer that allows users to easily access local and remote     data using File Transfer Protocol (FTP), Secure Shell File Transfer Protocol (SFTP), Web Distributed     Authoring and Versioning (WebDAV), Common Internet File System (CIFS), Server Message Block (SMB), and     other protocols. GVFS integrates with the GNOME I/O (GIO) abstraction layer.

    Security Fix(es):

    * gvfs: Incorrect authorization in admin backend allows privileged users to read and modify arbitrary     files without prompting for password (CVE-2019-3827)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2019-1517 advisory.

    - CVE-2019-3827: Prevent access if any authentication agent isn't available (#1690470)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2019:1517 advisory.

    GVFS is the GNOME Desktop Virtual File System layer that allows users to easily access local and remote     data using File Transfer Protocol (FTP), Secure Shell File Transfer Protocol (SFTP), Web Distributed     Authoring and Versioning (WebDAV), Common Internet File System (CIFS), Server Message Block (SMB), and     other protocols. GVFS integrates with the GNOME I/O (GIO) abstraction layer.

    Security Fix(es):

    * gvfs: Incorrect authorization in admin backend allows privileged users to read and modify arbitrary     files without prompting for password (CVE-2019-3827)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

This update for gvfs fixes the following issues :

Security vulnerability fixed :

  - CVE-2019-3827: Fixed an issue whereby an unprivileged     user was not prompted to give a password when acessing     root owned files. (bsc#1125084)

This update was imported from the SUSE:SLE-15:Update update project.

This update for gvfs fixes the following issues :

Security vulnerability fixed :

CVE-2019-3827: Fixed an issue whereby an unprivileged user was not prompted to give a password when acessing root owned files.
(bsc#1125084)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-3888-1 advisory.

    It was discovered that GVfs incorrectly handled certain inputs. An attacker could possibly use this issue     to access sensitive information.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
330510	NewStart CGSL MAIN 6.06 : gvfs Multiple Vulnerabilities (NS-SA-2026-0060)	Nessus	NewStart CGSL Local Security Checks	Local	high
289910	MiracleLinux 7 : gvfs-1.36.2-3.el7 (AXSA:2019-4036:01)	Nessus	Miracle Linux Local Security Checks	Local	high
239637	TencentOS Server 3: GNOME (TSSA-2022:0108)	Nessus	Tencent Local Security Checks	Local	high
236504	Alibaba Cloud Linux 3 : 0108: GNOME (ALINUX3-SA-2022:0108)	Nessus	Alibaba Cloud Linux Local Security Checks	Local	high
180833	Oracle Linux 7 : gvfs (ELSA-2019-2145)	Nessus	Oracle Linux Local Security Checks	Local	high
145640	CentOS 8 : gvfs (CESA-2019:1517)	Nessus	CentOS Local Security Checks	Local	high
132442	NewStart CGSL CORE 5.05 / MAIN 5.05 : gvfs Vulnerability (NS-SA-2019-0238)	Nessus	NewStart CGSL Local Security Checks	Local	high
131423	NewStart CGSL CORE 5.04 / MAIN 5.04 : gvfs Vulnerability (NS-SA-2019-0224)	Nessus	NewStart CGSL Local Security Checks	Local	high
130865	EulerOS 2.0 SP5 : gvfs (EulerOS-SA-2019-2156)	Nessus	Huawei Local Security Checks	Local	high
128364	CentOS 7 : gvfs (CESA-2019:2145)	Nessus	CentOS Local Security Checks	Local	high
128221	Scientific Linux Security Update : gvfs on SL7.x x86_64 (20190806)	Nessus	Scientific Linux Local Security Checks	Local	high
127684	RHEL 7 : gvfs (RHSA-2019:2145)	Nessus	Red Hat Local Security Checks	Local	high
127591	Oracle Linux 8 : gvfs (ELSA-2019-1517)	Nessus	Oracle Linux Local Security Checks	Local	high
126026	RHEL 8 : gvfs (RHSA-2019:1517)	Nessus	Red Hat Local Security Checks	Local	high
122497	openSUSE Security Update : gvfs (openSUSE-2019-261)	Nessus	SuSE Local Security Checks	Local	high
122342	SUSE SLED15 / SLES15 Security Update : gvfs (SUSE-SU-2019:0438-1)	Nessus	SuSE Local Security Checks	Local	high
122153	Ubuntu 18.04 LTS : GVfs vulnerability (USN-3888-1)	Nessus	Ubuntu Local Security Checks	Local	high

Detections

Analytics

CVE-2019-3827

high

Tenable Plugins

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