csaf_redhat - rhsa-2021

rhsa-2021_2734

Vulnerability from csaf_redhat

Published

2021-07-20 20:06

Modified

2024-09-13 20:28

Summary

Red Hat Security Advisory: kernel security and bug fix update

Notes

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.2 Advanced Update Support. Red Hat Product Security has rated this update as having a security impact of Important. 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 packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909) * kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034) 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): * xfs umount hangs in xfs_wait_buftarg() due to negative bt_io_count (BZ#1949916)

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": "An update for kernel is now available for Red Hat Enterprise Linux 7.2 Advanced Update Support.\n\nRed Hat Product Security has rated this update as having a security impact of Important. 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.",
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        "text": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)\n\n* kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)\n\nFor 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.\n\nBug Fix(es):\n\n* xfs umount hangs in xfs_wait_buftarg() due to negative bt_io_count (BZ#1949916)",
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          "text": "A use-after-free flaw was found in hci_send_acl in the bluetooth host controller interface (HCI) in Linux kernel, where a local attacker with an access rights could cause a denial of service problem on the system  The issue results from the object hchan, freed in hci_disconn_loglink_complete_evt, yet still used in other places. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.",
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          "text": "kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan",
          "title": "Vulnerability summary"
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          "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.",
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          "text": "An out-of-bounds write flaw was found in the Linux kernel\u0027s seq_file in the Filesystem layer. This flaw allows a local attacker with a user privilege to gain access to out-of-bound memory, leading to a system crash, leak of internal kernel information and can escalate privileges. The issue results from not validating the size_t-to-int conversion prior to performing operations. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: size_t-to-int conversion vulnerability in the filesystem layer",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Any Red Hat product which relies on the Red Hat Enterprise Linux kernel is also potentially impacted. \nThis includes layered products such as OpenShift Container Platform, OpenStack, Red Hat Virtualization, and others.",
          "title": "Statement"
        },
        {
          "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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}

cve-2021-33034

Vulnerability from cvelistv5

Published

2021-05-14 22:57

Modified

2024-08-03 23:42

Severity

Summary

In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value.

References

URL	Tags
https://syzkaller.appspot.com/bug?id=2e1943a94647f7732dd6fc60368642d6e8dc91b1	x_refsource_MISC
https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-hci_send_acl	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5c4c8c9544099bb9043a10a5318130a943e32fc3	x_refsource_MISC
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GI7Z7UBWBGD3ABNIL2DC7RQDCGA4UVQW/	vendor-advisory, x_refsource_FEDORA
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html	mailing-list, x_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html	mailing-list, x_refsource_MLIST

Impacted products

Vendor	Product
n/a	n/a

Show details on NVD website

JSON

To clipboard

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cve-2021-33909

Vulnerability from cvelistv5

Published

2021-07-20 18:01

Modified

2024-08-04 00:05

Severity

Summary

fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.

References

URL	Tags
https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html	mailing-list, x_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html	mailing-list, x_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html	mailing-list, x_refsource_MLIST
https://www.debian.org/security/2021/dsa-4941	vendor-advisory, x_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/	vendor-advisory, x_refsource_FEDORA
http://www.openwall.com/lists/oss-security/2021/07/22/7	mailing-list, x_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/08/25/10	mailing-list, x_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/17/2	mailing-list, x_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/17/4	mailing-list, x_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/21/1	mailing-list, x_refsource_MLIST
https://www.oracle.com/security-alerts/cpujan2022.html	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2021/07/20/1	x_refsource_MISC
https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b	x_refsource_CONFIRM
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4	x_refsource_CONFIRM
http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html	x_refsource_MISC
http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html	x_refsource_MISC
https://security.netapp.com/advisory/ntap-20210819-0004/	x_refsource_CONFIRM
http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html	x_refsource_MISC
http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html	x_refsource_MISC
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015	x_refsource_CONFIRM

Impacted products

Vendor	Product
n/a	n/a

Show details on NVD website

JSON

To clipboard

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              "name": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015",
              "refsource": "CONFIRM",
              "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-33909",
    "datePublished": "2021-07-20T18:01:34",
    "dateReserved": "2021-06-07T00:00:00",
    "dateUpdated": "2024-08-04T00:05:52.143Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Action not permitted

rhsa-2021_2734

Vulnerability from csaf_redhat

cve-2021-33034

Vulnerability from cvelistv5

cve-2021-33909

Vulnerability from cvelistv5

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