rhsa-2015_0695
Vulnerability from csaf_redhat
Published
2015-03-17 14:39
Modified
2024-11-22 08:52
Summary
Red Hat Security Advisory: kernel security and bug fix update
Notes
Topic
Updated kernel packages that fix multiple security issues and two bugs are
now available for Red Hat Enterprise Linux 6.2 Advanced Update Support.
Red Hat Product Security has rated this update as having Important security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.
Details
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
* A flaw was found in the way the Linux kernel's SCTP implementation
validated INIT chunks when performing Address Configuration Change
(ASCONF). A remote attacker could use this flaw to crash the system by
sending a specially crafted SCTP packet to trigger a NULL pointer
dereference on the system. (CVE-2014-7841, Important)
* It was found that the Linux kernel's Infiniband subsystem did not
properly sanitize input parameters while registering memory regions from
user space via the (u)verbs API. A local user with access to a
/dev/infiniband/uverbsX device could use this flaw to crash the system or,
potentially, escalate their privileges on the system. (CVE-2014-8159,
Important)
* An integer overflow flaw was found in the way the Linux kernel's Frame
Buffer device implementation mapped kernel memory to user space via the
mmap syscall. A local user able to access a frame buffer device file
(/dev/fb*) could possibly use this flaw to escalate their privileges on the
system. (CVE-2013-2596, Important)
* It was found that the parse_rock_ridge_inode_internal() function of the
Linux kernel's ISOFS implementation did not correctly check relocated
directories when processing Rock Ridge child link (CL) tags. An attacker
with physical access to the system could use a specially crafted ISO image
to crash the system or, potentially, escalate their privileges on the
system. (CVE-2014-5471, CVE-2014-5472, Low)
Red Hat would like to thank Mellanox for reporting the CVE-2014-8159 issue.
The CVE-2014-7841 issue was discovered by Liu Wei of Red Hat.
This update also fixes the following bugs:
* Previously, certain network device drivers did not accept ethtool
commands right after they were loaded. As a consequence, the current
setting of the specified device driver was not applied and an error message
was returned. The ETHTOOL_DELAY variable has been added, which makes sure
the ethtool utility waits for some time before it tries to apply the
options settings, thus fixing the bug. (BZ#1138299)
* During the memory allocation for a new socket to communicate to the
server, the rpciod daemon released a clean page which needed to be
committed. However, the commit was queueing indefinitely as the commit
could only be provided with a socket connection. As a consequence, a
deadlock occurred in rpciod. This update sets the PF_FSTRANS flag on the
work queue task prior to the socket allocation, and adds the
nfs_release_page check for the flag when deciding whether to make a commit
call, thus fixing this bug. (BZ#1192326)
All kernel users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. The system must be
rebooted for this update to take effect.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"text": "Updated kernel packages that fix multiple security issues and two bugs are\nnow available for Red Hat Enterprise Linux 6.2 Advanced Update Support.\n\nRed Hat Product Security has rated this update as having Important security\nimpact. Common Vulnerability Scoring System (CVSS) base scores, which give\ndetailed severity ratings, are available for each vulnerability from the\nCVE links in the References section.",
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"text": "The kernel packages contain the Linux kernel, the core of any Linux\noperating system.\n\n* A flaw was found in the way the Linux kernel\u0027s SCTP implementation\nvalidated INIT chunks when performing Address Configuration Change\n(ASCONF). A remote attacker could use this flaw to crash the system by\nsending a specially crafted SCTP packet to trigger a NULL pointer\ndereference on the system. (CVE-2014-7841, Important)\n\n* It was found that the Linux kernel\u0027s Infiniband subsystem did not\nproperly sanitize input parameters while registering memory regions from\nuser space via the (u)verbs API. A local user with access to a\n/dev/infiniband/uverbsX device could use this flaw to crash the system or,\npotentially, escalate their privileges on the system. (CVE-2014-8159,\nImportant)\n\n* An integer overflow flaw was found in the way the Linux kernel\u0027s Frame\nBuffer device implementation mapped kernel memory to user space via the\nmmap syscall. A local user able to access a frame buffer device file\n(/dev/fb*) could possibly use this flaw to escalate their privileges on the\nsystem. (CVE-2013-2596, Important)\n\n* It was found that the parse_rock_ridge_inode_internal() function of the\nLinux kernel\u0027s ISOFS implementation did not correctly check relocated\ndirectories when processing Rock Ridge child link (CL) tags. An attacker\nwith physical access to the system could use a specially crafted ISO image\nto crash the system or, potentially, escalate their privileges on the\nsystem. (CVE-2014-5471, CVE-2014-5472, Low)\n\nRed Hat would like to thank Mellanox for reporting the CVE-2014-8159 issue.\nThe CVE-2014-7841 issue was discovered by Liu Wei of Red Hat.\n\nThis update also fixes the following bugs:\n\n* Previously, certain network device drivers did not accept ethtool\ncommands right after they were loaded. As a consequence, the current\nsetting of the specified device driver was not applied and an error message\nwas returned. The ETHTOOL_DELAY variable has been added, which makes sure\nthe ethtool utility waits for some time before it tries to apply the\noptions settings, thus fixing the bug. (BZ#1138299)\n\n* During the memory allocation for a new socket to communicate to the\nserver, the rpciod daemon released a clean page which needed to be\ncommitted. However, the commit was queueing indefinitely as the commit\ncould only be provided with a socket connection. As a consequence, a\ndeadlock occurred in rpciod. This update sets the PF_FSTRANS flag on the\nwork queue task prior to the socket allocation, and adds the\nnfs_release_page check for the flag when deciding whether to make a commit\ncall, thus fixing this bug. (BZ#1192326)\n\nAll kernel users are advised to upgrade to these updated packages, which\ncontain backported patches to correct these issues. The system must be\nrebooted for this update to take effect.",
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"category": "vendor_fix",
"date": "2015-03-17T14:39:19+00:00",
"details": "Before applying this update, make sure all previously released errata relevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2015:0695"
}
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"scores": [
{
"cvss_v2": {
"accessComplexity": "HIGH",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 6.2,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:L/AC:H/Au:N/C:C/I:C/A:C",
"version": "2.0"
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: infiniband: uverbs: unprotected physical memory access"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.