CVE-2014-7843
published 2014-11-30CVE-2014-7843: The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of…
PriorityP413medium4.9CVSS 2.0
AVLACLAuNCNINAC
EPSS
0.37%
30.4th percentile
The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 3.16.7-ckt2-1 (bookworm) | linux 3.16.7-ckt2-1 (bookworm) |
| linux | linux_kernel | <= 3.17.3 | — |
| linux | linux_kernel | >= 0 < 3.16.7-ckt2-1 | 3.16.7-ckt2-1 |
| linux | linux_kernel | >= 0 < 3.16.7-ckt2-1 | 3.16.7-ckt2-1 |
| linux | linux_kernel | >= 0 < 3.16.7-ckt2-1 | 3.16.7-ckt2-1 |
| linux | linux_kernel | >= 0 < 3.16.7-ckt2-1 | 3.16.7-ckt2-1 |
| linux | linux_kernel | >= 0 < 3.13.0-44.73 | 3.13.0-44.73 |
CVSS provenance
nvdv2.04.9MEDIUMAV:L/AC:L/Au:N/C:N/I:N/A:C
osv5.0MEDIUM
vendor_ubuntu5.0MEDIUM
vendor_debian4.9MEDIUM
vendor_redhat4.9MEDIUM
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Ubuntu
Linux kernel (Trusty HWE) vulnerabilities
vendor_ubuntu·2015-01-13·CVSS 5.0
CVE-2014-7841 [MEDIUM] Linux kernel (Trusty HWE) vulnerabilities
Title: Linux kernel (Trusty HWE) vulnerabilities
Summary: Several security issues were fixed in the kernel.
A null pointer dereference flaw was discovered in the the Linux kernel's
SCTP implementation when ASCONF is used. A remote attacker could exploit
this flaw to cause a denial of service (system crash) via a malformed INIT
chunk. (CVE-2014-7841)
A race condition with MMIO and PIO transactions in the KVM (Kernel Virtual
Machine) subsystem of the Linux kernel was discovered. A guest OS user
could exploit this flaw to cause a denial of service (guest OS crash) via a
specially crafted application. (CVE-2014-7842)
Miloš Prchlík reported a flaw in how the ARM64 platform handles a single
byte overflow in __clear_user. A local user could exploit this flaw to
cause a denial of service (syst
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2015-01-13·CVSS 5.0
CVE-2014-7841 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the kernel.
A null pointer dereference flaw was discovered in the the Linux kernel's
SCTP implementation when ASCONF is used. A remote attacker could exploit
this flaw to cause a denial of service (system crash) via a malformed INIT
chunk. (CVE-2014-7841)
A race condition with MMIO and PIO transactions in the KVM (Kernel Virtual
Machine) subsystem of the Linux kernel was discovered. A guest OS user
could exploit this flaw to cause a denial of service (guest OS crash) via a
specially crafted application. (CVE-2014-7842)
Miloš Prchlík reported a flaw in how the ARM64 platform handles a single
byte overflow in __clear_user. A local user could exploit this flaw to
cause a denial of service (system crash) by
Ubuntu
Linux kernel (Utopic HWE) vulnerabilities
vendor_ubuntu·2015-01-13·CVSS 5.0
CVE-2014-7841 [MEDIUM] Linux kernel (Utopic HWE) vulnerabilities
Title: Linux kernel (Utopic HWE) vulnerabilities
Summary: Several security issues were fixed in the kernel.
A null pointer dereference flaw was discovered in the the Linux kernel's
SCTP implementation when ASCONF is used. A remote attacker could exploit
this flaw to cause a denial of service (system crash) via a malformed INIT
chunk. (CVE-2014-7841)
A race condition with MMIO and PIO transactions in the KVM (Kernel Virtual
Machine) subsystem of the Linux kernel was discovered. A guest OS user
could exploit this flaw to cause a denial of service (guest OS crash) via a
specially crafted application. (CVE-2014-7842)
Miloš Prchlík reported a flaw in how the ARM64 platform handles a single
byte overflow in __clear_user. A local user could exploit this flaw to
cause a denial of service (syst
Red Hat
kernel: aarch64: copying from /dev/zero causes local DoS
vendor_redhat·2014-11-13·CVSS 4.9
CVE-2014-7843 [MEDIUM] CWE-390 kernel: aarch64: copying from /dev/zero causes local DoS
kernel: aarch64: copying from /dev/zero causes local DoS
The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.
Statement: Not vulnerable.
This issue does not affect the Linux kernel packages as shipped with Red Hat
Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
Package: kernel (Red Hat Enterprise Linux 5) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: realtime-kernel (Red Hat Enterprise MRG 2) - Not affected
Debian
CVE-2014-7843: linux - The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel bef...
vendor_debian·2014·CVSS 4.9
CVE-2014-7843 [MEDIUM] CVE-2014-7843: linux - The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel bef...
The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.
Scope: local
bookworm: resolved (fixed in 3.16.7-ckt2-1)
bullseye: resolved (fixed in 3.16.7-ckt2-1)
forky: resolved (fixed in 3.16.7-ckt2-1)
sid: resolved (fixed in 3.16.7-ckt2-1)
trixie: resolved (fixed in 3.16.7-ckt2-1)
GHSA
GHSA-8973-h52f-9cxp: The __clear_user function in arch/arm64/lib/clear_user
ghsa_unreviewed·2022-05-17
CVE-2014-7843 [MEDIUM] GHSA-8973-h52f-9cxp: The __clear_user function in arch/arm64/lib/clear_user
The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.
OSV
linux vulnerabilities
osv·2015-01-13·CVSS 5.0
CVE-2014-7841 [MEDIUM] linux vulnerabilities
linux vulnerabilities
A null pointer dereference flaw was discovered in the the Linux kernel's
SCTP implementation when ASCONF is used. A remote attacker could exploit
this flaw to cause a denial of service (system crash) via a malformed INIT
chunk. (CVE-2014-7841)
A race condition with MMIO and PIO transactions in the KVM (Kernel Virtual
Machine) subsystem of the Linux kernel was discovered. A guest OS user
could exploit this flaw to cause a denial of service (guest OS crash) via a
specially crafted application. (CVE-2014-7842)
Miloš Prchlík reported a flaw in how the ARM64 platform handles a single
byte overflow in __clear_user. A local user could exploit this flaw to
cause a denial of service (system crash) by reading one byte beyond a
/dev/zero page boundary. (CVE-2014-7843)
A stac
OSV
linux-lts-utopic vulnerabilities
osv·2015-01-13·CVSS 5.0
CVE-2014-7841 [MEDIUM] linux-lts-utopic vulnerabilities
linux-lts-utopic vulnerabilities
A null pointer dereference flaw was discovered in the the Linux kernel's
SCTP implementation when ASCONF is used. A remote attacker could exploit
this flaw to cause a denial of service (system crash) via a malformed INIT
chunk. (CVE-2014-7841)
A race condition with MMIO and PIO transactions in the KVM (Kernel Virtual
Machine) subsystem of the Linux kernel was discovered. A guest OS user
could exploit this flaw to cause a denial of service (guest OS crash) via a
specially crafted application. (CVE-2014-7842)
Miloš Prchlík reported a flaw in how the ARM64 platform handles a single
byte overflow in __clear_user. A local user could exploit this flaw to
cause a denial of service (system crash) by reading one byte beyond a
/dev/zero page boundary. (CVE-2014-78
OSV
CVE-2014-7843: The __clear_user function in arch/arm64/lib/clear_user
osv·2014-11-30·CVSS 4.9
CVE-2014-7843 [MEDIUM] CVE-2014-7843: The __clear_user function in arch/arm64/lib/clear_user
The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2014-7843 kernel: aarch64: copying from /dev/zero causes local DoS
bugzilla·2014-11-13·CVSS 7.8
CVE-2014-7843 [HIGH] CVE-2014-7843 kernel: aarch64: copying from /dev/zero causes local DoS
CVE-2014-7843 kernel: aarch64: copying from /dev/zero causes local DoS
It was found that a read of n*PAGE_SIZE+1 from /dev/zero
will cause the kernel to panic due to an unhandled exception since it's
not handling the single byte case with a fixup (anything larger than a
single byte will properly fault.)
A local, unprivileged user could use this flaw to crash the system.
Upstream patch proposal:
https://lkml.org/lkml/2014/11/12/584
Acknowledgements:
This issue was discovered by Miloš Prchlík of Red Hat.
Discussion:
Statement CVE-2014-7825:
Not vulnerable.
This issue does not affect the Linux kernel packages as shipped with Red Hat
Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
---
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1163745]
---
kerne
Bugzilla
CVE-2014-7843 kernel: aarch64: copying from /dev/zero causes local DoS [fedora-all]
bugzilla·2014-11-13·CVSS 4.9
CVE-2014-7843 [MEDIUM] CVE-2014-7843 kernel: aarch64: copying from /dev/zero causes local DoS [fedora-all]
CVE-2014-7843 kernel: aarch64: copying from /dev/zero causes local DoS [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 versio
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=97fc15436b36ee3956efad83e22a557991f7d19dhttp://secunia.com/advisories/62305http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.17.4http://www.openwall.com/lists/oss-security/2014/11/13/5http://www.securityfocus.com/bid/71082https://bugzilla.redhat.com/show_bug.cgi?id=1163744https://github.com/torvalds/linux/commit/97fc15436b36ee3956efad83e22a557991f7d19dhttp://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=97fc15436b36ee3956efad83e22a557991f7d19dhttp://secunia.com/advisories/62305http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.17.4http://www.openwall.com/lists/oss-security/2014/11/13/5http://www.securityfocus.com/bid/71082https://bugzilla.redhat.com/show_bug.cgi?id=1163744https://github.com/torvalds/linux/commit/97fc15436b36ee3956efad83e22a557991f7d19d
2014-11-30
Published