A privilege escalation flaw was found in gluster 3.x snapshot scheduler. Any gluster client allowed to mount gluster volumes could also mount shared gluster storage volume and escalate privileges by scheduling malicious cronjob via symlink.

The remote Ubuntu 16.04 ESM / 18.04 ESM host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4770-1 advisory.

    It was discovered that GlusterFS incorrectly handled network requests. An attacker could possibly use this     issue to cause a denial of service. This issue only affected Ubuntu 14.04 ESM. (CVE-2014-3619)

    It was discovered that GlusterFS incorrectly handled user permissions. An authenticated attacker could     possibly use this to add himself to a trusted storage pool and perform privileged operations on volumes.
    This issue only affected Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2018-10841)

    It was discovered that GlusterFS incorrectly handled mounting gluster volumes. An attacker could possibly     use this issue to also mount shared gluster volumes and escalate privileges through malicious cronjobs.
    This issue only affected Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2018-1088)

    It was discovered that GlusterFS incorrectly handled file paths. An attacker could possibly use this issue     to create arbitrary files and execute arbitrary code. (CVE-2018-10904)

    It was discovered that GlusterFS incorrectly handled mounting volumes. An attacker could possibly use this     issue to cause a denial of service or run arbitrary code. (CVE-2018-10907)

    It was discovered that GlusterFS incorrectly handled negative key length values. An attacker could     possibly use this issue to obtain sensitive information. (CVE-2018-10911)

    It was discovered that GlusterFS incorrectly handled FUSE requests. An attacker could use this issue to     obtain sensitive information. (CVE-2018-10913, CVE-2018-10914)

    It was discovered that GlusterFS incorrectly handled the file creation process. An authenticated attacker     could possibly use this issue to create arbitrary files and obtain sensitive information. (CVE-2018-10923)

    It was discovered that GlusterFS incorrectly handled certain inputs. An authenticated attacker could     possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 ESM.
    (CVE-2018-10924)

    It was discovered that GlusterFS incorrectly handled RPC requests. An attacker could possibly use this     issue to write files to an arbitrary location and execute arbitrary code. (CVE-2018-10926, CVE-2018-10927,     CVE-2018-10928, CVE-2018-10929, CVE-2018-10930)

    It was discovered that the fix for CVE-2018-10926, CVE-2018-10927, CVE-2018-10928, CVE-2018-10929,     CVE-2018-10930 was incomplete. A remote authenticated attacker could possibly use this issue to execute     arbitrary code or cause a denial of service. (CVE-2018-14651)

    It was discovered that GlusterFS incorrectly handled certain files. A remote authenticated attacker could     possibly use this issue to cause a denial of service. (CVE-2018-14652)

    It was discovered that GlusterFS incorrectly handled RPC requests. A remote authenticated attacker could     possibly use this issue to cause a denial of service or other unspecified impact. (CVE-2018-14653)

    It was discovered that GlusterFS incorrectly handled mount volumes operation. A remote attacker could     possibly use this issue to create arbitrary files. This issue only affected Ubuntu 18.04 ESM.
    (CVE-2018-14654)

    It was discovered that GlusterFS incorrectly handled certain files. A remote authenticated attacker could     possibly use this issue to create arbitrary files. (CVE-2018-14659)

    It was discovered that GlusterFS incorrectly handled certain inputs. A remote authenticated attacker could     possibly use this is issue to cause a denial of service. This issue only affected Ubuntu 18.04 ESM.
    (CVE-2018-14660)

    It was discovered that GlusterFS incorrectly handled strings. A remote authenticated attacker could     possibly use this issue to cause a denial of service. (CVE-2018-14661)

Tenable has extracted the preceding description block directly from the Ubuntu 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 Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2806 advisory.

  - glusterfs is vulnerable to privilege escalation on gluster server nodes. An authenticated gluster client     via TLS could use gluster cli with --remote-host command to add it self to trusted storage pool and     perform privileged gluster operations like adding other machines to trusted storage pool, start, stop, and     delete volumes. (CVE-2018-10841)

  - A privilege escalation flaw was found in gluster 3.x snapshot scheduler. Any gluster client allowed to     mount gluster volumes could also mount shared gluster storage volume and escalate privileges by scheduling     malicious cronjob via symlink. (CVE-2018-1088)

  - It was found that glusterfs server does not properly sanitize file paths in the trusted.io-stats-dump     extended attribute which is used by the debug/io-stats translator. Attacker can use this flaw to create     files and execute arbitrary code. To exploit this attacker would require sufficient access to modify the     extended attributes of files on a gluster volume. (CVE-2018-10904)

  - It was found that glusterfs server is vulnerable to multiple stack based buffer overflows due to functions     in server-rpc-fopc.c allocating fixed size buffers using 'alloca(3)'. An authenticated attacker could     exploit this by mounting a gluster volume and sending a string longer that the fixed buffer size to cause     crash or potential code execution. (CVE-2018-10907)

  - A flaw was found in the way dic_unserialize function of glusterfs does not handle negative key length     values. An attacker could use this flaw to read memory from other locations into the stored dict value.
    (CVE-2018-10911)

  - An information disclosure vulnerability was discovered in glusterfs server. An attacker could issue a     xattr request via glusterfs FUSE to determine the existence of any file. (CVE-2018-10913)

  - It was found that an attacker could issue a xattr request via glusterfs FUSE to cause gluster brick     process to crash which will result in a remote denial of service. If gluster multiplexing is enabled this     will result in a crash of multiple bricks and gluster volumes. (CVE-2018-10914)

  - It was found that the mknod call derived from mknod(2) can create files pointing to devices on a     glusterfs server node. An authenticated attacker could use this to create an arbitrary device and read     data from any device attached to the glusterfs server node. (CVE-2018-10923)

  - A flaw was found in RPC request using gfs3_mknod_req supported by glusterfs server. An authenticated     attacker could use this flaw to write files to an arbitrary location via path traversal and execute     arbitrary code on a glusterfs server node. (CVE-2018-10926)

  - A flaw was found in RPC request using gfs3_lookup_req in glusterfs server. An authenticated attacker could     use this flaw to leak information and execute remote denial of service by crashing gluster brick process.
    (CVE-2018-10927)

  - A flaw was found in RPC request using gfs3_symlink_req in glusterfs server which allows symlink     destinations to point to file paths outside of the gluster volume. An authenticated attacker could use     this flaw to create arbitrary symlinks pointing anywhere on the server and execute arbitrary code on     glusterfs server nodes. (CVE-2018-10928)

  - A flaw was found in RPC request using gfs2_create_req in glusterfs server. An authenticated attacker could     use this flaw to create arbitrary files and execute arbitrary code on glusterfs server nodes.
    (CVE-2018-10929)

  - A flaw was found in RPC request using gfs3_rename_req in glusterfs server. An authenticated attacker could     use this flaw to write to a destination outside the gluster volume. (CVE-2018-10930)

  - The Gluster file system through versions 3.12 and 4.1.4 is vulnerable to a buffer overflow in the     'features/index' translator via the code handling the 'GF_XATTR_CLRLK_CMD' xattr in the 'pl_getxattr'     function. A remote authenticated attacker could exploit this on a mounted volume to cause a denial of     service. (CVE-2018-14652)

  - The Gluster file system through versions 4.1.4 and 3.12 is vulnerable to a heap-based buffer overflow in     the '__server_getspec' function via the 'gf_getspec_req' RPC message. A remote authenticated attacker     could exploit this to cause a denial of service or other potential unspecified impact. (CVE-2018-14653)

  - The Gluster file system through version 4.1.4 is vulnerable to abuse of the 'features/index' translator. A     remote attacker with access to mount volumes could exploit this via the 'GF_XATTROP_ENTRY_IN_KEY' xattrop     to create arbitrary, empty files on the target server. (CVE-2018-14654)

  - The Gluster file system through versions 4.1.4 and 3.1.2 is vulnerable to a denial of service attack via     use of the 'GF_XATTR_IOSTATS_DUMP_KEY' xattr. A remote, authenticated attacker could exploit this by     mounting a Gluster volume and repeatedly calling 'setxattr(2)' to trigger a state dump and create an     arbitrary number of files in the server's runtime directory. (CVE-2018-14659)

  - A flaw was found in glusterfs server through versions 4.1.4 and 3.1.2 which allowed repeated usage of     GF_META_LOCK_KEY xattr. A remote, authenticated attacker could use this flaw to create multiple locks for     single inode by using setxattr repetitively resulting in memory exhaustion of glusterfs server node.
    (CVE-2018-14660)

  - It was found that usage of snprintf function in feature/locks translator of glusterfs server 3.8.4, as     shipped with Red Hat Gluster Storage, was vulnerable to a format string attack. A remote, authenticated     attacker could use this flaw to cause remote denial of service. (CVE-2018-14661)

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 glusterfs fixes the following issues :

glusterfs was update to release 3.12.15 :

  - Fixed a number of bugs and security issues :

  - CVE-2018-1088, CVE-2018-1112 [boo#1090084],     CVE-2018-10904 [boo#1107018], CVE-2018-10907     [boo#1107019], CVE-2018-10911 [boo#1107020],     CVE-2018-10913 [boo#1107021], CVE-2018-10914     [boo#1107022], CVE-2018-10923 [boo#1107023],     CVE-2018-10924 [boo#1107024], CVE-2018-10926     [boo#1107025], CVE-2018-10927 [boo#1107026],     CVE-2018-10928 [boo#1107027], CVE-2018-10928     [boo#1107027], CVE-2018-10929 [boo#1107028],     CVE-2018-10930 [boo#1107029], boo#1105776 .

The remote host is affected by the vulnerability described in GLSA-201904-06 (GlusterFS: Multiple Vulnerabilities)

    Multiple vulnerabilities have been discovered in GlusterFS. Please       review the referenced CVE identifiers for details.
  Impact :

    Please review the referenced CVE identifiers for details.
  Workaround :

    There is no known workaround at this time.

Security fix for CVE-2018-1088 (Privilege escalation via gluster_shared_storage when snapshot scheduling is enabled)

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

According to the versions of the glusterfs packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A privilege escalation flaw was found in gluster     snapshot scheduler. Any gluster client allowed to mount     gluster volumes could also mount shared gluster storage     volume and escalate privileges by scheduling malicious     cronjob via symlink.(CVE-2018-1088)

  - It was found that fix for CVE-2018-1088 introduced a     new vulnerability in the way 'auth.allow' is     implemented in glusterfs server. An unauthenticated     gluster client could mount gluster storage     volumes.(CVE-2018-1112)

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.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:1524 advisory.

    The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include     redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH)     are installed using a special build of Red Hat Enterprise Linux with only the packages required to host     virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and     performing administrative tasks.

    Includes GlusterFS fixes for CVE-2018-1088, dhcp fixes for CVE-2018-1111, kernel fixes for CVE-2018-1087,     and kernel fixes for CVE-2018-8897.

    A list of bugs fixed in this update is available in the Technical Notes book:
    https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.2/html/technical_notes/

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

An update for redhat-release-virtualization-host and redhat-virtualization-host is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. 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.

The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor.
Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks.

The ovirt-node-ng packages provide the Red Hat Virtualization Host.
These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks.

Security Fix(es) :

* glusterfs: Privilege escalation via gluster_shared_storage when snapshot scheduling is enabled (CVE-2018-1088)

* It was found that fix for CVE-2018-1088 introduced new vulnerability in the way 'auth.allow' is implemented in glusterfs server. An unauthenticated gluster client could mount gluster storage volumes.
(CVE-2018-1112)

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

This issue was discovered by John Strunk (Red Hat).

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2018:1137 advisory.

  - glusterfs: Privilege escalation via gluster_shared_storage when snapshot scheduling is enabled     (CVE-2018-1088)

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	Severity
183640	Ubuntu 16.04 ESM / 18.04 ESM : GlusterFS vulnerabilities (USN-4770-1)	Nessus	Ubuntu Local Security Checks	high
154881	Debian DLA-2806-1 : glusterfs - LTS security update	Nessus	Debian Local Security Checks	high
133132	openSUSE Security Update : glusterfs (openSUSE-2020-79)	Nessus	SuSE Local Security Checks	high
123580	GLSA-201904-06 : GlusterFS: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	high
120856	Fedora 28 : glusterfs (2018-e048a4ef13)	Nessus	Fedora Local Security Checks	high
110849	EulerOS 2.0 SP3 : glusterfs (EulerOS-SA-2018-1185)	Nessus	Huawei Local Security Checks	high
109909	RHEL 7 : redhat-virtualization-host update (Important) (RHSA-2018:1524)	Nessus	Red Hat Local Security Checks	high
109748	Fedora 26 : glusterfs (2018-f9e0f1caf7)	Nessus	Fedora Local Security Checks	high
109568	RHEL 7 : Virtualization (RHSA-2018:1275)	Nessus	Red Hat Local Security Checks	high
109520	Fedora 27 : glusterfs (2018-6dc9145693)	Nessus	Fedora Local Security Checks	high
109160	RHEL 6 : glusterfs (RHSA-2018:1137)	Nessus	Red Hat Local Security Checks	high

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CVE-2018-1088

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