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Message #134273
[Bug 1490826] Re: [CVE] NVIDIA's VDPAU Library Exposed To Security Issue
** Summary changed:
- NVIDIA's VDPAU Library Exposed To Security Issue
+ [CVE] NVIDIA's VDPAU Library Exposed To Security Issue
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https://bugs.launchpad.net/bugs/1490826
Title:
[CVE] NVIDIA's VDPAU Library Exposed To Security Issue
Status in libvdpau package in Ubuntu:
New
Bug description:
From a Phoronix post:
http://lists.x.org/archives/xorg-announce/2015-August/002630.html
http://anzwix.com/a/VDPAU/UseSecuregetenv3ToImproveSecurity
NVIDIA released the libvdpau 1.1.1 library today to fix three new CVE
security issues.
Aaron Plattner of NVIDIA announced today:
libvdpau versions 1.1 and earlier, when used in setuid or setgid applications, contain vulnerabilities related to environment variable handling that could allow an attacker to execute arbitrary code or overwrite arbitrary files. See CVE-2015-5198, CVE-2015-5199, and CVE-2015-5200 for more details.
This release uses the secure_getenv() function, when available, to fix
these problems. On platforms where secure_getenv() is not available,
the VDPAU environment variables will not be honored by the library.
The secure_getenv() call is used now rather than getenv() for
obtaining the environment variable values of DRI_PRIME, VDPAU_DRIVER,
VDPAU_DRIVER_PATH, VDPAU_TRACE, and VDPAU_TRACE_FILE, per this commit.
The secure_getenv() call has been present since glibc 2.17 is GNU-
specific and will return null in cases where secure execution is
required, details via the man page.
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References