CVE-2018-1093
published 2018-04-02CVE-2018-1093: The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read…
PriorityP421medium5.5CVSS 3.0
AVLACLPRNUIRSUCNINAH
EPSS
2.00%
78.8th percentile
The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 4.15.17-1 (bookworm) | linux 4.15.17-1 (bookworm) |
| linux | linux_kernel | <= 4.15.15 | — |
| linux | linux_kernel | >= 0 < 4.15.17-1 | 4.15.17-1 |
| linux | linux_kernel | >= 0 < 4.15.17-1 | 4.15.17-1 |
| linux | linux_kernel | >= 0 < 4.15.17-1 | 4.15.17-1 |
| linux | linux_kernel | >= 0 < 4.15.17-1 | 4.15.17-1 |
| linux | linux_kernel | >= 0 < 3.13.0-157.207 | 3.13.0-157.207 |
| linux | linux_kernel | >= 0 < 4.4.0-128.154 | 4.4.0-128.154 |
| linux | linux_kernel | >= 0 < 4.15.0-33.36 | 4.15.0-33.36 |
CVSS provenance
nvdv3.05.5MEDIUMCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
nvdv2.07.1HIGHAV:N/AC:M/Au:N/C:N/I:N/A:C
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
vendor_ubuntu5.5MEDIUM
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GHSA
GHSA-pv9g-26f5-fxv7: The ext4_valid_block_bitmap function in fs/ext4/balloc
ghsa_unreviewed·2022-05-14
CVE-2018-1093 [HIGH] CWE-125 GHSA-pv9g-26f5-fxv7: The ext4_valid_block_bitmap function in fs/ext4/balloc
The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.
OSV
linux-azure, linux-oem, linux-gcp vulnerabilities
osv·2018-08-28·CVSS 5.5
CVE-2018-1000200 [MEDIUM] linux-azure, linux-oem, linux-gcp vulnerabilities
linux-azure, linux-oem, linux-gcp vulnerabilities
It was discovered that, when attempting to handle an out-of-memory
situation, a null pointer dereference could be triggered in the Linux
kernel in some circumstances. A local attacker could use this to cause a
denial of service (system crash). (CVE-2018-1000200)
Wen Xu discovered that the XFS filesystem implementation in the Linux
kernel did not properly validate meta-data information. An attacker could
use this to construct a malicious xfs image that, when mounted, could cause
a denial of service (system crash). (CVE-2018-10323)
Wen Xu discovered that the XFS filesystem implementation in the Linux
kernel did not properly validate xattr information. An attacker could use
this to construct a malicious xfs image that, when mounted, could c
OSV
linux, linux-aws, linux-gcp, linux-kvm, linux-raspi2 vulnerabilities
osv·2018-08-24·CVSS 5.5
CVE-2018-1000200 [MEDIUM] linux, linux-aws, linux-gcp, linux-kvm, linux-raspi2 vulnerabilities
linux, linux-aws, linux-gcp, linux-kvm, linux-raspi2 vulnerabilities
It was discovered that, when attempting to handle an out-of-memory
situation, a null pointer dereference could be triggered in the Linux
kernel in some circumstances. A local attacker could use this to cause a
denial of service (system crash). (CVE-2018-1000200)
Wen Xu discovered that the XFS filesystem implementation in the Linux
kernel did not properly validate meta-data information. An attacker could
use this to construct a malicious xfs image that, when mounted, could cause
a denial of service (system crash). (CVE-2018-10323)
Wen Xu discovered that the XFS filesystem implementation in the Linux
kernel did not properly validate xattr information. An attacker could use
this to construct a malicious xfs image that, wh
OSV
linux vulnerabilities
osv·2018-08-24·CVSS 4.3
CVE-2016-10208 [MEDIUM] linux vulnerabilities
linux vulnerabilities
Ralf Spenneberg discovered that the ext4 implementation in the Linux kernel
did not properly validate meta block groups. An attacker with physical
access could use this to specially craft an ext4 image that causes a denial
of service (system crash). (CVE-2016-10208)
It was discovered that an information disclosure vulnerability existed in
the ACPI implementation of the Linux kernel. A local attacker could use
this to expose sensitive information (kernel memory addresses).
(CVE-2017-11472)
It was discovered that a buffer overflow existed in the ACPI table parsing
implementation in the Linux kernel. A local attacker could use this to
construct a malicious ACPI table that, when loaded, caused a denial of
service (system crash) or possibly execute arbitrary code.
(CVE-
OSV
linux-hwe vulnerabilities
osv·2018-08-24·CVSS 5.5
CVE-2018-10002 [MEDIUM] linux-hwe vulnerabilities
linux-hwe vulnerabilities
USN-3752-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu
16.04 LTS.
It was discovered that, when attempting to handle an out-of-memory
situation, a null pointer dereference could be triggered in the Linux
kernel in some circumstances. A local attacker could use this to cause a
denial of service (system crash). (CVE-2018-1000200)
Wen Xu discovered that the XFS filesystem implementation in the Linux
kernel did not properly validate meta-data information. An attacker could
use this to construct a malicious xfs image that, when mounted, could cause
a denial of service (system crash). (CVE-2018-10323)
Wen Xu discovered tha
OSV
linux-lts-xenial, linux-aws vulnerabilities
osv·2018-06-11·CVSS 5.5
[MEDIUM] linux-lts-xenial, linux-aws vulnerabilities
linux-lts-xenial, linux-aws vulnerabilities
USN-3676-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.
Wen Xu discovered that the ext4 filesystem implementation in the Linux
kernel did not properly handle corrupted meta data in some situations. An
attacker could use this to specially craft an ext4 file system that caused
a denial of service (system crash) when mounted. (CVE-2018-1092,
CVE-2018-1093)
It was discovered that the cdrom driver in the Linux kernel contained an
incorrect bounds check. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2018-10940)
It was discovered that the 802.11 software s
OSV
linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
osv·2018-06-11·CVSS 5.5
CVE-2018-1092 [MEDIUM] linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
Wen Xu discovered that the ext4 filesystem implementation in the Linux
kernel did not properly handle corrupted meta data in some situations. An
attacker could use this to specially craft an ext4 filesystem that caused
a denial of service (system crash) when mounted. (CVE-2018-1092,
CVE-2018-1093)
It was discovered that the cdrom driver in the Linux kernel contained an
incorrect bounds check. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2018-10940)
It was discovered that the 802.11 software simulator implementation in the
Linux kernel contained a memory leak when handling certain error
conditions. A local attacker could possibly use this to cause a denial of
service (memo
OSV
CVE-2018-1093: The ext4_valid_block_bitmap function in fs/ext4/balloc
osv·2018-04-02·CVSS 5.5
CVE-2018-1093 [MEDIUM] CVE-2018-1093: The ext4_valid_block_bitmap function in fs/ext4/balloc
The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.
Kernel
ext4: add validity checks for bitmap block numbers
kernel_security·2018-03-26·CVSS 5.5
CVE-2018-1093 [MEDIUM] ext4: add validity checks for bitmap block numbers
ext4: add validity checks for bitmap block numbers
An privileged attacker can cause a crash by mounting a crafted ext4
image which triggers a out-of-bounds read in the function
ext4_valid_block_bitmap() in fs/ext4/balloc.c.
This issue has been assigned CVE-2018-1093.
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=199181
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1560782
Reported-by: Wen Xu
Signed-off-by: Theodore Ts'o
Cc: [email protected]
Ubuntu
Linux kernel (Azure, GCP, OEM) vulnerabilities
vendor_ubuntu·2018-08-28·CVSS 5.5
CVE-2018-1000200 [MEDIUM] Linux kernel (Azure, GCP, OEM) vulnerabilities
Title: Linux kernel (Azure, GCP, OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that, when attempting to handle an out-of-memory
situation, a null pointer dereference could be triggered in the Linux
kernel in some circumstances. A local attacker could use this to cause a
denial of service (system crash). (CVE-2018-1000200)
Wen Xu discovered that the XFS filesystem implementation in the Linux
kernel did not properly validate meta-data information. An attacker could
use this to construct a malicious xfs image that, when mounted, could cause
a denial of service (system crash). (CVE-2018-10323)
Wen Xu discovered that the XFS filesystem implementation in the Linux
kernel did not properly validate xattr information. An attacker could u
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2018-08-24·CVSS 5.5
CVE-2018-1000200 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that, when attempting to handle an out-of-memory
situation, a null pointer dereference could be triggered in the Linux
kernel in some circumstances. A local attacker could use this to cause a
denial of service (system crash). (CVE-2018-1000200)
Wen Xu discovered that the XFS filesystem implementation in the Linux
kernel did not properly validate meta-data information. An attacker could
use this to construct a malicious xfs image that, when mounted, could cause
a denial of service (system crash). (CVE-2018-10323)
Wen Xu discovered that the XFS filesystem implementation in the Linux
kernel did not properly validate xattr information. An attacker could use
this to constru
Ubuntu
Linux kernel (HWE) vulnerabilities
vendor_ubuntu·2018-08-24·CVSS 5.5
CVE-2018-1000200 [MEDIUM] Linux kernel (HWE) vulnerabilities
Title: Linux kernel (HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
USN-3752-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu
16.04 LTS.
It was discovered that, when attempting to handle an out-of-memory
situation, a null pointer dereference could be triggered in the Linux
kernel in some circumstances. A local attacker could use this to cause a
denial of service (system crash). (CVE-2018-1000200)
Wen Xu discovered that the XFS filesystem implementation in the Linux
kernel did not properly validate meta-data information. An attacker could
use this to construct a malicious xfs image that, when mounted, could
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2018-08-24·CVSS 4.3
CVE-2016-10208 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Ralf Spenneberg discovered that the ext4 implementation in the Linux kernel
did not properly validate meta block groups. An attacker with physical
access could use this to specially craft an ext4 image that causes a denial
of service (system crash). (CVE-2016-10208)
It was discovered that an information disclosure vulnerability existed in
the ACPI implementation of the Linux kernel. A local attacker could use
this to expose sensitive information (kernel memory addresses).
(CVE-2017-11472)
It was discovered that a buffer overflow existed in the ACPI table parsing
implementation in the Linux kernel. A local attacker could use this to
construct a malicious ACPI table that, when loaded, cau
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2018-06-11·CVSS 5.5
CVE-2018-1092 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Wen Xu discovered that the ext4 filesystem implementation in the Linux
kernel did not properly handle corrupted meta data in some situations. An
attacker could use this to specially craft an ext4 filesystem that caused
a denial of service (system crash) when mounted. (CVE-2018-1092,
CVE-2018-1093)
It was discovered that the cdrom driver in the Linux kernel contained an
incorrect bounds check. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2018-10940)
It was discovered that the 802.11 software simulator implementation in the
Linux kernel contained a memory leak when handling certain error
conditions. A local attacker could possibly use this to cause
Ubuntu
Linux kernel (Xenial HWE) vulnerabilities
vendor_ubuntu·2018-06-11·CVSS 5.5
CVE-2018-1092 [MEDIUM] Linux kernel (Xenial HWE) vulnerabilities
Title: Linux kernel (Xenial HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
USN-3676-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.
Wen Xu discovered that the ext4 filesystem implementation in the Linux
kernel did not properly handle corrupted meta data in some situations. An
attacker could use this to specially craft an ext4 file system that caused
a denial of service (system crash) when mounted. (CVE-2018-1092,
CVE-2018-1093)
It was discovered that the cdrom driver in the Linux kernel contained an
incorrect bounds check. A local attacker could use this to expose sensitive
information (kernel
Red Hat
kernel: Out of bounds read in ext4/balloc.c:ext4_valid_block_bitmap() causes crash with crafted ext4 image
vendor_redhat·2018-03-22·CVSS 5.5
CVE-2018-1093 [MEDIUM] CWE-125 kernel: Out of bounds read in ext4/balloc.c:ext4_valid_block_bitmap() causes crash with crafted ext4 image
kernel: Out of bounds read in ext4/balloc.c:ext4_valid_block_bitmap() causes crash with crafted ext4 image
The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.
The Linux kernel is vulnerable to an out-of-bounds read in ext4/balloc.c:ext4_valid_block_bitmap() function. An attacker could trick a legitimate user or a privileged attacker could exploit this by mounting a crafted ext4 image to cause a crash.
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 a
Debian
CVE-2018-1093: linux - The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel thr...
vendor_debian·2018·CVSS 5.5
CVE-2018-1093 [MEDIUM] CVE-2018-1093: linux - The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel thr...
The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.
Scope: local
bookworm: resolved (fixed in 4.15.17-1)
bullseye: resolved (fixed in 4.15.17-1)
forky: resolved (fixed in 4.15.17-1)
sid: resolved (fixed in 4.15.17-1)
trixie: resolved (fixed in 4.15.17-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2018-1093 kernel: Out of bounds read in ext4/balloc.c:ext4_valid_block_bitmap() causes crash with crafted ext4 image
bugzilla·2018-03-27·CVSS 5.5
CVE-2018-1093 [MEDIUM] CVE-2018-1093 kernel: Out of bounds read in ext4/balloc.c:ext4_valid_block_bitmap() causes crash with crafted ext4 image
CVE-2018-1093 kernel: Out of bounds read in ext4/balloc.c:ext4_valid_block_bitmap() causes crash with crafted ext4 image
The Linux kernel is vulnerable to an out-of-bounds read in ext4/balloc.c:ext4_valid_block_bitmap() function. An attacker could trick a legitimate user or a privileged attacker could exploit this by mounting a crafted ext4 image to cause a crash.
References:
https://bugzilla.kernel.org/show_bug.cgi?id=199181
http://seclists.org/oss-sec/2018/q1/284
An upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7dac4a1726a9c
Discussion:
Acknowledgments:
Name: Wen Xu
---
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1560784]
---
(In reply to Vladis Dronov from comment #5)
> Notes:
>
> While the reproduce
Bugzilla
CVE-2018-1093 kernel: Out of bounds read in ext4/balloc.c:ext4_valid_block_bitmap() causes crash with crafted ext4 image [fedora-all]
bugzilla·2018-03-27·CVSS 5.5
CVE-2018-1093 [MEDIUM] CVE-2018-1093 kernel: Out of bounds read in ext4/balloc.c:ext4_valid_block_bitmap() causes crash with crafted ext4 image [fedora-all]
CVE-2018-1093 kernel: Out of bounds read in ext4/balloc.c:ext4_valid_block_bitmap() causes crash with crafted ext4 image [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-all.
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 messag
http://openwall.com/lists/oss-security/2018/03/29/1https://bugzilla.kernel.org/show_bug.cgi?id=199181https://bugzilla.redhat.com/show_bug.cgi?id=1560782https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=7dac4a1726a9c64a517d595c40e95e2d0d135f6fhttps://lists.debian.org/debian-lts-announce/2018/06/msg00000.htmlhttps://lists.debian.org/debian-lts-announce/2018/07/msg00015.htmlhttps://lists.debian.org/debian-lts-announce/2018/07/msg00016.htmlhttps://usn.ubuntu.com/3676-1/https://usn.ubuntu.com/3676-2/https://usn.ubuntu.com/3752-1/https://usn.ubuntu.com/3752-2/https://usn.ubuntu.com/3752-3/https://usn.ubuntu.com/3754-1/https://www.debian.org/security/2018/dsa-4188http://openwall.com/lists/oss-security/2018/03/29/1https://bugzilla.kernel.org/show_bug.cgi?id=199181https://bugzilla.redhat.com/show_bug.cgi?id=1560782https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=7dac4a1726a9c64a517d595c40e95e2d0d135f6fhttps://lists.debian.org/debian-lts-announce/2018/06/msg00000.htmlhttps://lists.debian.org/debian-lts-announce/2018/07/msg00015.htmlhttps://lists.debian.org/debian-lts-announce/2018/07/msg00016.htmlhttps://usn.ubuntu.com/3676-1/https://usn.ubuntu.com/3676-2/https://usn.ubuntu.com/3752-1/https://usn.ubuntu.com/3752-2/https://usn.ubuntu.com/3752-3/https://usn.ubuntu.com/3754-1/https://www.debian.org/security/2018/dsa-4188
2018-04-02
Published