RHSA-2019_0525
Vulnerability from csaf_redhat - Published: 2019-03-13 02:11 - Updated: 2024-11-22 12:41Summary
Red Hat Security Advisory: kernel-alt security and bug fix update
Severity
Moderate
Notes
Topic: An update for kernel-alt is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The kernel-alt packages provide the Linux kernel version 4.x.
Security Fix(es):
* kernel: out-of-bounds memcpy in fs/ext4/inline.c:ext4_read_inline_data() with crafted ext4 image (CVE-2018-11412)
* kernel: use-after-free in jbd2_journal_commit_transaction funtion (CVE-2018-10876)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Bug Fix(es):
* blk-mq IO hang in null_blk test (BZ#1581223)
* lpfc remove lpfc_enable_pbde module parameter. (BZ#1615875)
* RHEL-Alt-7.6 - [Power9][DD2.2][4.14.0-109]package installation segfaults inside debian chroot env in P9 KVM guest with HTM enabled (kvm) (BZ#1628817)
* Pegas1.1 - [P9] "threads=2" or higher is required to boot up VM with above 256 vcpu [rhel-alt-7.6.z] (BZ#1634653)
* RHEL-Alt-7.6 Snapshot5 - System crashed under stress-ng & HTX on the mix mode guest (kvm) (BZ#1637890)
* RHEL-Alt-7.6 - BostonESS:P9:DD2.01 - Testing Ethtool options 'r' and 'p' for the i40e driver causes the kernel to crash and reboots the server (i40e) (CORAL) (BZ#1644606)
* RHEL-Alt-7.6 Host/RHV4.2: system crashed and kdump failed to collect CPUs in KVM guests (BZ#1649196)
* RHEL-Alt-7.6 Host:BostonLC:P9:boslcp1: system crashed in __find_linux_pte+0xac (kvm) (BZ#1651065)
* [LLNL 7.7 Bug] Rasdaemon doesn’t seem to collect APEI errors (BZ#1664495)
Users of kernel are advised to upgrade to these updated packages, which fix these bugs.
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.
A flaw was found in the Linux kernel's ext4 filesystem code. A use-after-free is possible in ext4_ext_remove_space() function when mounting and operating a crafted ext4 image.
5.0 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
https://access.redhat.com/errata/RHSA-2019:0525
The fs/ext4/inline.c:ext4_read_inline_data() function in the Linux kernel performs a memcpy with an untrusted length value in certain circumstances involving a crafted filesystem that stores the system.data extended attribute value in a dedicated inode. The unbound copy can cause memory corruption or possible privilege escalation.
6.8 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
https://access.redhat.com/errata/RHSA-2019:0525
References
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"cve": "CVE-2018-10876",
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"name": "Use After Free"
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"discovery_date": "2018-06-28T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1596773"
}
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{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s ext4 filesystem code. A use-after-free is possible in ext4_ext_remove_space() function when mounting and operating a crafted ext4 image.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: use-after-free in jbd2_journal_commit_transaction funtion",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"title": "kernel: use-after-free in jbd2_journal_commit_transaction funtion"
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{
"cve": "CVE-2018-11412",
"cwe": {
"id": "CWE-805",
"name": "Buffer Access with Incorrect Length Value"
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{
"category": "description",
"text": "The fs/ext4/inline.c:ext4_read_inline_data() function in the Linux kernel performs a memcpy with an untrusted length value in certain circumstances involving a crafted filesystem that stores the system.data extended attribute value in a dedicated inode. The unbound copy can cause memory corruption or possible privilege escalation.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: out-of-bounds memcpy in fs/ext4/inline.c:ext4_read_inline_data() with crafted ext4 image",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2019:0525"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "PHYSICAL",
"availabilityImpact": "HIGH",
"baseScore": 6.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.0"
},
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}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: out-of-bounds memcpy in fs/ext4/inline.c:ext4_read_inline_data() with crafted ext4 image"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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