Buffer underflow in X.org libXvMC before 1.0.10 allows remote X servers to have unspecified impact via an empty string.

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

  - Buffer underflow in X.org libXvMC before 1.0.10 allows     remote X servers to have unspecified impact via an     empty string.(CVE-2016-7953)

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 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.

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

  - insufficient validation of data from the X server can     cause a one byte buffer read underrun (bsc#1003023,     CVE-2016-7953)

  - insufficient validation of data from the X server can     cause out of boundary memory access or endless loops     (Denial of Service) (bsc#1003012, CVE-2016-7951,     CVE-2016-7952)

  - insufficient validation of data from the X server can     cause out of boundary memory writes (bsc#1003000,     CVE-2016-7947, CVE-2016-7948)

  - insufficient validation of data from the X server can     cause out of boundary memory access or endless loops     (Denial of Service). (bsc#1002998, CVE-2016-7945,     CVE-2016-7946)

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 libXvMC fixes the following security issue :

  - insufficient validation of data from the X server could     cause a one byte buffer read underrun (boo#1003023,     CVE-2016-7953)

This update for the X Window System client libraries fixes a class of privilege escalation issues. A malicious X Server could send specially crafted data to X clients, which allowed for triggering crashes, or privilege escalation if this relationship was untrusted or crossed user or permission level boundaries. libX11, libXfixes, libXi, libXrandr, libXrender, libXtst, libXv, libXvMC were fixed, specifically: libX11 :

  - CVE-2016-7942: insufficient validation of data from the     X server allowed out of boundary memory read     (bsc#1002991) libXfixes :

  - CVE-2016-7944: insufficient validation of data from the     X server can cause an integer overflow on 32 bit     architectures (bsc#1002995) libXi :

  - CVE-2016-7945, CVE-2016-7946: insufficient validation of     data from the X server can cause out of boundary memory     access or endless loops (Denial of Service)     (bsc#1002998) libXtst :

  - CVE-2016-7951, CVE-2016-7952: insufficient validation of     data from the X server can cause out of boundary memory     access or endless loops (Denial of Service)     (bsc#1003012) libXv :

  - CVE-2016-5407: insufficient validation of data from the     X server can cause out of boundary memory and memory     corruption (bsc#1003017) libXvMC :

  - CVE-2016-7953: insufficient validation of data from the     X server can cause a one byte buffer read underrun     (bsc#1003023) libXrender :

  - CVE-2016-7949, CVE-2016-7950: insufficient validation of     data from the X server can cause out of boundary memory     writes (bsc#1003002) libXrandr :

  - CVE-2016-7947, CVE-2016-7948: insufficient validation of     data from the X server can cause out of boundary memory     writes (bsc#1003000)

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.

Security fix for CVE-2016-7953

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.

New x11 packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, 14.2, and -current to fix security issues.

This update for the X Window System client libraries fixes a class of privilege escalation issues.

A malicious X Server could send specially crafted data to X clients, which allowed for triggering crashes, or privilege escalation if this relationship was untrusted or crossed user or permission level boundaries.

libX11, libXfixes, libXi, libXrandr, libXrender, libXtst, libXv, libXvMC were fixed, specifically :

libX11 :

  - CVE-2016-7942: insufficient validation of data from the     X server allowed out of boundary memory read     (bsc#1002991)

libXfixes :

  - CVE-2016-7944: insufficient validation of data from the     X server can cause an integer overflow on 32 bit     architectures (bsc#1002995)

libXi :

  - CVE-2016-7945, CVE-2016-7946: insufficient validation of     data from the X server can cause out of boundary memory     access or endless loops (Denial of Service)     (bsc#1002998)

libXtst :

  - CVE-2016-7951, CVE-2016-7952: insufficient validation of     data from the X server can cause out of boundary memory     access or endless loops (Denial of Service)     (bsc#1003012)

libXv :

  - CVE-2016-5407: insufficient validation of data from the     X server can cause out of boundary memory and memory     corruption (bsc#1003017)

libXvMC :

  - CVE-2016-7953: insufficient validation of data from the     X server can cause a one byte buffer read underrun     (bsc#1003023)

libXrender :

  - CVE-2016-7949, CVE-2016-7950: insufficient validation of     data from the X server can cause out of boundary memory     writes (bsc#1003002)

libXrandr :

  - CVE-2016-7947, CVE-2016-7948: insufficient validation of     data from the X server can cause out of boundary memory     writes (bsc#1003000)

This update was imported from the SUSE:SLE-12:Update update project.

CVE-2016-7953 If an empty string is received from an x-server, do not underrun the buffer by accessing 'rep.nameLen - 1' unconditionally, which could end up being -1.

For Debian 7 'Wheezy', these problems have been fixed in version 2:1.0.7-1+deb7u3.

We recommend that you upgrade your libxvmc 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.

ID	Name	Product	Family	Severity
132163	EulerOS 2.0 SP3 : libXvMC (EulerOS-SA-2019-2628)	Nessus	Huawei Local Security Checks	critical
131595	EulerOS 2.0 SP2 : libXvMC (EulerOS-SA-2019-2441)	Nessus	Huawei Local Security Checks	critical
99276	GLSA-201704-03 : X.Org: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical
96034	SUSE SLES11 Security Update : xorg-x11-libs (SUSE-SU-2016:3189-1)	Nessus	SuSE Local Security Checks	critical
95648	openSUSE Security Update : libXvMC (openSUSE-2016-1424)	Nessus	SuSE Local Security Checks	critical
94939	SUSE SLED12 / SLES12 Security Update : X Window System client libraries (SUSE-SU-2016:2828-1)	Nessus	SuSE Local Security Checks	critical
94790	Fedora 25 : libXvMC (2016-37b9932690)	Nessus	Fedora Local Security Checks	critical
94490	Fedora 23 : libXvMC (2016-d286ffb801)	Nessus	Fedora Local Security Checks	critical
94439	Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / 14.2 / current : x11 (SSA:2016-305-02)	Nessus	Slackware Local Security Checks	critical
94220	openSUSE Security Update : X Window System client libraries (openSUSE-2016-1214)	Nessus	SuSE Local Security Checks	critical
94145	Debian DLA-671-1 : libxvmc security update	Nessus	Debian Local Security Checks	critical
94036	SUSE SLED12 / SLES12 Security Update : X Window System client libraries (SUSE-SU-2016:2505-1)	Nessus	SuSE Local Security Checks	critical
93925	Fedora 24 : libXvMC (2016-a236cb3315)	Nessus	Fedora Local Security Checks	critical

Detections

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CVE-2016-7953

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