CVE-2015-8777
published 2016-01-20CVE-2015-8777: The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection…
PriorityP421medium5.5CVSS 3.0
AVLACLPRLUINSUCNIHAN
EPSS
0.57%
43.7th percentile
The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection mechanism via a zero value of the LD_POINTER_GUARD environment variable.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | glibc | < glibc 2.21-1 (bookworm) | glibc 2.21-1 (bookworm) |
| eglibc | eglibc | >= 0 < 2.19-0ubuntu6.8 | 2.19-0ubuntu6.8 |
| eglibc | eglibc | >= 0 < 2.19-0ubuntu6.9 | 2.19-0ubuntu6.9 |
| gnu | glibc | <= 2.22 | — |
| gnu | glibc | >= 0 < 2.21-1 | 2.21-1 |
| gnu | glibc | >= 0 < 2.21-1 | 2.21-1 |
| gnu | glibc | >= 0 < 2.21-1 | 2.21-1 |
| gnu | glibc | >= 0 < 2.21-1 | 2.21-1 |
CVSS provenance
nvdv3.05.5MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
nvdv2.02.1LOWAV:L/AC:L/Au:N/C:N/I:P/A:N
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
vendor_ubuntu2.6LOW
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GHSA
GHSA-2gq8-953m-fqr3: The process_envvars function in elf/rtld
ghsa_unreviewed·2022-05-14
CVE-2015-8777 [MEDIUM] GHSA-2gq8-953m-fqr3: The process_envvars function in elf/rtld
The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection mechanism via a zero value of the LD_POINTER_GUARD environment variable.
OSV
eglibc, glibc regression
osv·2016-05-26·CVSS 2.6
CVE-2014-9761 [LOW] eglibc, glibc regression
eglibc, glibc regression
USN-2985-1 fixed vulnerabilities in the GNU C Library. The fix for
CVE-2014-9761 introduced a regression which affected applications that
use the libm library but were not fully restarted after the upgrade.
This update removes the fix for CVE-2014-9761 and a future update
will be provided to address this issue.
We apologize for the inconvenience.
Original advisory details:
Martin Carpenter discovered that pt_chown in the GNU C Library did not
properly check permissions for tty files. A local attacker could use this
to gain administrative privileges or expose sensitive information.
(CVE-2013-2207, CVE-2016-2856)
Robin Hack discovered that the Name Service Switch (NSS) implementation in
the GNU C Library did not properly manage its file descriptors. An attacker
OSV
eglibc, glibc vulnerabilities
osv·2016-05-25·CVSS 2.6
CVE-2013-2207 [LOW] eglibc, glibc vulnerabilities
eglibc, glibc vulnerabilities
Martin Carpenter discovered that pt_chown in the GNU C Library did not
properly check permissions for tty files. A local attacker could use this
to gain administrative privileges or expose sensitive information.
(CVE-2013-2207, CVE-2016-2856)
Robin Hack discovered that the Name Service Switch (NSS) implementation in
the GNU C Library did not properly manage its file descriptors. An attacker
could use this to cause a denial of service (infinite loop).
(CVE-2014-8121)
Joseph Myers discovered that the GNU C Library did not properly handle long
arguments to functions returning a representation of Not a Number (NaN). An
attacker could use this to cause a denial of service (stack exhaustion
leading to an application crash) or possibly execute arbitrary code.
(CVE
OSV
CVE-2015-8777: The process_envvars function in elf/rtld
osv·2016-01-20·CVSS 5.5
CVE-2015-8777 [MEDIUM] CVE-2015-8777: The process_envvars function in elf/rtld
The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection mechanism via a zero value of the LD_POINTER_GUARD environment variable.
Ubuntu
GNU C Library regression
vendor_ubuntu·2016-05-26·CVSS 2.6
CVE-2014-9761 [LOW] GNU C Library regression
Title: GNU C Library regression
Summary: USN-2985-1 introduced a regression in the GNU C Library.
USN-2985-1 fixed vulnerabilities in the GNU C Library. The fix for
CVE-2014-9761 introduced a regression which affected applications that
use the libm library but were not fully restarted after the upgrade.
This update removes the fix for CVE-2014-9761 and a future update
will be provided to address this issue.
We apologize for the inconvenience.
Original advisory details:
Martin Carpenter discovered that pt_chown in the GNU C Library did not
properly check permissions for tty files. A local attacker could use this
to gain administrative privileges or expose sensitive information.
(CVE-2013-2207, CVE-2016-2856)
Robin Hack discovered that the Name Service Switch (NSS) implementation in
th
Ubuntu
GNU C Library vulnerabilities
vendor_ubuntu·2016-05-25·CVSS 2.6
CVE-2013-2207 [LOW] GNU C Library vulnerabilities
Title: GNU C Library vulnerabilities
Summary: Several security issues were fixed in the GNU C Library.
Martin Carpenter discovered that pt_chown in the GNU C Library did not
properly check permissions for tty files. A local attacker could use this
to gain administrative privileges or expose sensitive information.
(CVE-2013-2207, CVE-2016-2856)
Robin Hack discovered that the Name Service Switch (NSS) implementation in
the GNU C Library did not properly manage its file descriptors. An attacker
could use this to cause a denial of service (infinite loop).
(CVE-2014-8121)
Joseph Myers discovered that the GNU C Library did not properly handle long
arguments to functions returning a representation of Not a Number (NaN). An
attacker could use this to cause a denial of service (stack exhaustion
Red Hat
glibc: LD_POINTER_GUARD in the environment is not sanitized
vendor_redhat·2015-09-05·CVSS 5.5
CVE-2015-8777 [MEDIUM] glibc: LD_POINTER_GUARD in the environment is not sanitized
glibc: LD_POINTER_GUARD in the environment is not sanitized
The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection mechanism via a zero value of the LD_POINTER_GUARD environment variable.
It was found that the dynamic loader did not sanitize the LD_POINTER_GUARD environment variable. An attacker could use this flaw to bypass the pointer guarding protection on set-user-ID or set-group-ID programs to execute arbitrary code with the permissions of the user running the application.
Mitigation: The glibc pointer guard is a post-exploitation mitigation mechanism. As such, it is only relevant if there are exploitable security vulnerabilities in the system. Therefore, applying available security
Debian
CVE-2015-8777: glibc - The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or li...
vendor_debian·2015·CVSS 5.5
CVE-2015-8777 [MEDIUM] CVE-2015-8777: glibc - The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or li...
The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection mechanism via a zero value of the LD_POINTER_GUARD environment variable.
Scope: local
bookworm: resolved (fixed in 2.21-1)
bullseye: resolved (fixed in 2.21-1)
forky: resolved (fixed in 2.21-1)
sid: resolved (fixed in 2.21-1)
trixie: resolved (fixed in 2.21-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2015-8777 glibc: LD_POINTER_GUARD in the environment is not sanitized [fedora-all]
bugzilla·2015-09-07·CVSS 5.5
CVE-2015-8777 [MEDIUM] CVE-2015-8777 glibc: LD_POINTER_GUARD in the environment is not sanitized [fedora-all]
CVE-2015-8777 glibc: LD_POINTER_GUARD in the environment is not sanitized [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported ver
Bugzilla
CVE-2015-8777 glibc: LD_POINTER_GUARD in the environment is not sanitized
bugzilla·2015-09-07·CVSS 5.5
CVE-2015-8777 [MEDIUM] CVE-2015-8777 glibc: LD_POINTER_GUARD in the environment is not sanitized
CVE-2015-8777 glibc: LD_POINTER_GUARD in the environment is not sanitized
A weakness in the dynamic loader has been found, making glibc of versions prior 2.22.90 affected. LD_POINTER_GUARD in the environment is not sanitizaed allowing attacker to easily bypass the pointer guarding protection on set-user-ID and set-group-ID programs.
Reproducing steps available at:
http://hmarco.org/bugs/glibc_ptr_mangle_weakness.html
CVE request:
http://seclists.org/oss-sec/2015/q3/504
Discussion:
Created glibc tracking bugs for this issue:
Affects: fedora-all [bug 1260583]
---
Upstream patch:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commit;h=a014cecd82b71b70a6a843e250e06b541ad524f7
---
CVE has been requested, still no response:
http://www.openwall.com/lists/oss-security/2015/09/05/8
http://hmarco.org/bugs/glibc_ptr_mangle_weakness.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-02/msg00037.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-02/msg00038.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-02/msg00039.htmlhttp://www.debian.org/security/2016/dsa-3480http://www.openwall.com/lists/oss-security/2016/01/20/1http://www.securityfocus.com/bid/81469http://www.securitytracker.com/id/1034811http://www.ubuntu.com/usn/USN-2985-1http://www.ubuntu.com/usn/USN-2985-2https://access.redhat.com/errata/RHSA-2017:1916https://security.gentoo.org/glsa/201702-11https://sourceware.org/bugzilla/show_bug.cgi?id=18928http://hmarco.org/bugs/glibc_ptr_mangle_weakness.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-02/msg00037.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-02/msg00038.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-02/msg00039.htmlhttp://www.debian.org/security/2016/dsa-3480http://www.openwall.com/lists/oss-security/2016/01/20/1http://www.securityfocus.com/bid/81469http://www.securitytracker.com/id/1034811http://www.ubuntu.com/usn/USN-2985-1http://www.ubuntu.com/usn/USN-2985-2https://access.redhat.com/errata/RHSA-2017:1916https://security.gentoo.org/glsa/201702-11https://sourceware.org/bugzilla/show_bug.cgi?id=18928
2016-01-20
Published