It was discovered that libICE before 1.0.9-8 used a weak entropy to generate keys. A local attacker could potentially use this flaw for session hijacking using the information available from the process list.

The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by a vulnerability that has been acknowledged by the vendor but will not be patched.

  - libICE: weak entropy usage in session keys (CVE-2017-2626)

Note that Nessus has not tested for this issue but has instead relied on the package manager's report that the package is installed.

The remote Redhat Enterprise Linux 5 host has one or more packages installed that are affected by a vulnerability that has been acknowledged by the vendor but will not be patched.

  - libICE: weak entropy usage in session keys (CVE-2017-2626)

Note that Nessus has not tested for this issue but has instead relied on the package manager's report that the package is installed.

This plugin has been deprecated as it does not adhere to established standards for this style of check.

The remote Ubuntu 16.04 ESM / 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5744-1 advisory.

    It was discovered that libICE was using a weak mechanism to generate the session cookies. A local attacker     could possibly use this issue to perform a privilege escalation attack.

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.

According to the version of the libICE package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerability :

  - It was discovered that libICE used a weak entropy to     generate keys. A local attacker could potentially use     this flaw for session hijacking using the information     available from the process list.(CVE-2017-2626)

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.

It has been found, that libice, an X11 Inter-Client Exchange library, uses weak entropy to generate keys.

Using arc4random_buf() from libbsd should avoid this flaw.

For Debian 8 'Jessie', this problem has been fixed in version 2:1.0.9-1+deb8u1.

We recommend that you upgrade your libice packages.

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

This update for libICE fixes the following issues :

  - CVE-2017-2626: Creation of the ICE auth session cookies     used insufficient randomness, making these cookies     predictable. A more random generation method has been     implemented. (boo#1025068)

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.

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

  - An integer overflow flaw leading to a heap-based buffer     overflow was found in libXpm. An attacker could use     this flaw to crash an application using libXpm via a     specially crafted XPM file. (CVE-2016-10164)

  - It was discovered that libXdmcp used weak entropy to     generate session keys. On a multi-user system using     xdmcp, a local attacker could potentially use     information available from the process list to brute     force the key, allowing them to hijack other users'     sessions. (CVE-2017-2625)

  - It was discovered that libICE used a weak entropy to     generate keys. A local attacker could potentially use     this flaw for session hijacking using the information     available from the process list. (CVE-2017-2626)

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 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.

The X11 (Xorg) libraries provide library routines that are used within all X Window applications.

The following packages have been upgraded to a later upstream version:
libX11 (1.6.5), libXaw (1.0.13), libXdmcp (1.1.2), libXfixes (5.0.3), libXfont (1.5.2), libXi (1.7.9), libXpm (3.5.12), libXrandr (1.5.1), libXrender (0.9.10), libXt (1.1.5), libXtst (1.2.3), libXv (1.0.11), libXvMC (1.0.10), libXxf86vm (1.1.4), libdrm (2.4.74), libepoxy (1.3.1), libevdev (1.5.6), libfontenc (1.1.3), libvdpau (1.1.1), libwacom (0.24), libxcb (1.12), libxkbfile (1.0.9), mesa (17.0.1), mesa-private-llvm (3.9.1), xcb-proto (1.12), xkeyboard-config (2.20), xorg-x11-proto-devel (7.7). (BZ#1401667, BZ#1401668, BZ#1401669, BZ#1401670, BZ#1401671, BZ#1401672, BZ#1401673, BZ#1401675, BZ# 1401676, BZ#1401677, BZ#1401678, BZ#1401679, BZ#1401680, BZ#1401681, BZ# 1401682, BZ#1401683, BZ#1401685, BZ#1401690, BZ#1401752, BZ#1401753, BZ# 1401754, BZ#1402560, BZ#1410477, BZ#1411390, BZ#1411392, BZ#1411393, BZ# 1411452, BZ#1420224)

Security Fix(es) :

* An integer overflow flaw leading to a heap-based buffer overflow was found in libXpm. An attacker could use this flaw to crash an application using libXpm via a specially crafted XPM file.
(CVE-2016-10164)

* It was discovered that libXdmcp used weak entropy to generate session keys. On a multi-user system using xdmcp, a local attacker could potentially use information available from the process list to brute force the key, allowing them to hijack other users' sessions.
(CVE-2017-2625)

* It was discovered that libICE used a weak entropy to generate keys.
A local attacker could potentially use this flaw for session hijacking using the information available from the process list. (CVE-2017-2626)

Red Hat would like to thank Eric Sesterhenn (X41 D-Sec GmbH) for reporting CVE-2017-2625 and CVE-2017-2626.

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section.

The following packages have been upgraded to a later upstream version:
libX11 (1.6.5), libXaw (1.0.13), libXdmcp (1.1.2), libXfixes (5.0.3), libXfont (1.5.2), libXi (1.7.9), libXpm (3.5.12), libXrandr (1.5.1), libXrender (0.9.10), libXt (1.1.5), libXtst (1.2.3), libXv (1.0.11), libXvMC (1.0.10), libXxf86vm (1.1.4), libdrm (2.4.74), libepoxy (1.3.1), libevdev (1.5.6), libfontenc (1.1.3), libvdpau (1.1.1), libwacom (0.24), libxcb (1.12), libxkbfile (1.0.9), mesa (17.0.1), mesa-private-llvm (3.9.1), xcb-proto (1.12), xkeyboard-config (2.20), xorg-x11-proto-devel (7.7).

Security Fix(es) :

  - An integer overflow flaw leading to a heap-based buffer     overflow was found in libXpm. An attacker could use this     flaw to crash an application using libXpm via a     specially crafted XPM file. (CVE-2016-10164)

  - It was discovered that libXdmcp used weak entropy to     generate session keys. On a multi-user system using     xdmcp, a local attacker could potentially use     information available from the process list to brute     force the key, allowing them to hijack other users'     sessions. (CVE-2017-2625)

  - It was discovered that libICE used a weak entropy to     generate keys. A local attacker could potentially use     this flaw for session hijacking using the information     available from the process list. (CVE-2017-2626)

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2017-1865 advisory.

    - Use libbsd for randoms (CVE-2017-2626, rhbz#1427715)
    - Use libbsd for randoms (CVE-2017-2625, rhbz#1427716)
    - fixes CVE-2016-5407
    - fixes CVE-2016-7953

Tenable has extracted the preceding description block directly from the Oracle 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.

Security fix for CVE-2017-2626

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.

This update for xorg-x11-libICE fixes the following issues :

  - CVE-2017-2626: Creation of the ICE auth session cookies     used insufficient randomness, making these cookies     predictable. A more random generation method has been     implemented. (boo#1025068)

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.

This update for libICE fixes the following issues :

  - CVE-2017-2626: Creation of the ICE auth session cookies     used insufficient randomness, making these cookies     predictable. A more random generation method has been     implemented. (boo#1025068)

The remote host is affected by the vulnerability described in GLSA-201704-03 (X.Org: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in X.Org server and       libraries. Please review the CVE identifiers referenced below for       details.
  Impact :

    A local or remote users can utilize the vulnerabilities to attach to the       X.Org session as a user and execute arbitrary code.
  Workaround :

    There is no known workaround at this time.

ID	Name	Product	Family	Severity
199220	RHEL 6 : libice (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
199131	RHEL 5 : libice (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
195723	RHEL 6 : libice (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	medium
195626	RHEL 5 : libice (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	medium
168208	Ubuntu 16.04 ESM / 18.04 LTS : libICE vulnerability (USN-5744-1)	Nessus	Ubuntu Local Security Checks	medium
140940	EulerOS Virtualization for ARM 64 3.0.6.0 : libICE (EulerOS-SA-2020-1992)	Nessus	Huawei Local Security Checks	medium
131247	Debian DLA-2002-1 : libice security update	Nessus	Debian Local Security Checks	medium
106578	SUSE SLED12 / SLES12 Security Update : libICE (SUSE-SU-2018:0337-1)	Nessus	SuSE Local Security Checks	medium
103070	EulerOS 2.0 SP2 : libXpm, libXdmcp, libICE (EulerOS-SA-2017-1212)	Nessus	Huawei Local Security Checks	critical
103069	EulerOS 2.0 SP1 : libXpm, libXdmcp, libICE (EulerOS-SA-2017-1211)	Nessus	Huawei Local Security Checks	critical
102740	CentOS 7 : libICE / libX11 / libXaw / libXcursor / libXdmcp / libXfixes / libXfont / libXfont2 / etc (CESA-2017:1865)	Nessus	CentOS Local Security Checks	critical
102636	Scientific Linux Security Update : X.org X11 libraries on SL7.x x86_64 (20170801)	Nessus	Scientific Linux Local Security Checks	critical
102340	Oracle Linux 7 : X.org / X11 / libraries (ELSA-2017-1865)	Nessus	Oracle Linux Local Security Checks	critical
102147	RHEL 7 : X.org X11 libraries (RHSA-2017:1865)	Nessus	Red Hat Local Security Checks	critical
101664	Fedora 26 : libICE (2017-7ac378e011)	Nessus	Fedora Local Security Checks	medium
101519	SUSE SLES11 Security Update : xorg-x11-libICE (SUSE-SU-2017:1848-1)	Nessus	SuSE Local Security Checks	medium
101390	SUSE SLED12 / SLES12 Security Update : libICE (SUSE-SU-2017:1835-1)	Nessus	SuSE Local Security Checks	medium
101281	openSUSE Security Update : libICE (openSUSE-2017-784)	Nessus	SuSE Local Security Checks	medium
99276	GLSA-201704-03 : X.Org: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical
97540	Fedora 24 : libICE (2017-d068b54614)	Nessus	Fedora Local Security Checks	medium
97539	Fedora 25 : libICE (2017-c02eb668a7)	Nessus	Fedora Local Security Checks	medium

Detections

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CVE-2017-2626

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