rhsa-2022_5214
Vulnerability from csaf_redhat
Published
2022-06-28 06:58
Modified
2024-11-15 14:53
Summary
Red Hat Security Advisory: kpatch-patch security update

Notes

Topic
An update for kpatch-patch is now available for Red Hat Enterprise Linux 9. 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
This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel. Security Fix(es): * kernel: Small table perturb size in the TCP source port generation algorithm can lead to information leak (CVE-2022-1012) * kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root (CVE-2022-1966) * kernel: buffer overflow in IPsec ESP transformation code (CVE-2022-27666) 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.
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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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Moshe Kol"
          ],
          "organization": "Hebrew University"
        }
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      "cve": "CVE-2022-1012",
      "cwe": {
        "id": "CWE-200",
        "name": "Exposure of Sensitive Information to an Unauthorized Actor"
      },
      "discovery_date": "2022-03-16T00:00:00+00:00",
      "ids": [
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          "text": "2064604"
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        {
          "category": "description",
          "text": "The Linux kernel\u0027s TCP source port generation algorithm in the TCP stack contains a flaw due to the small table perturb size. This flaw allows an attacker to positively distinguish a system among devices with identical hardware and software, which lasts until the device restarts.\r\n\r\nAn attacker can guess the evolution of the internal state used for source port generation. This information is used to infer the TCP traffic patterns of the victim, guessing the number of outgoing TCP connections established in a specific time frame, which can lead to a system fingerprinting.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: Small table perturb size in the TCP source port generation algorithm can lead to information leak",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat Enterprise Linux version 7 (RHEL7) is not affected by this issue. While RHEL7 implements the TCP port randomization algorithm 3 (the Simple Hash-Based Port Selection Algorithm), which knowingly has shortcomings (as per RFC 6056, item 3.3.3), the object of study of this flaw was the TCP port selector algorithm 4, the Double-Hash Port Selection Algorithm, which is not existent in RHEL7.\n\nThis flaw is ranked as a Moderate impact due to:\n* Limited exposure of the data in the TCP stack;\n* The impact of this vulnerability is limited to a system fingerprinting;\n* The requirements to carry the attack are elevated, requiring monitoring of the data flow.",
          "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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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2064604"
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2022-1012",
          "url": "https://www.cve.org/CVERecord?id=CVE-2022-1012"
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          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-1012",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-1012"
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          "summary": "https://arxiv.org/abs/2209.12993",
          "url": "https://arxiv.org/abs/2209.12993"
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          "summary": "https://datatracker.ietf.org/doc/html/rfc6056#section-3.3.4",
          "url": "https://datatracker.ietf.org/doc/html/rfc6056#section-3.3.4"
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          "summary": "https://lore.kernel.org/lkml/20220428124001.7428-1-w@1wt.eu/",
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          "summary": "https://lwn.net/Articles/910435/",
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      "release_date": "2022-05-02T04:30:00+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2022-06-28T06:58:01+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
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            "BaseOS-9.0.0.Z.MAIN.EUS:kpatch-patch-5_14_0-70_13_1-debugsource-0:1-1.el9_0.ppc64le",
            "BaseOS-9.0.0.Z.MAIN.EUS:kpatch-patch-5_14_0-70_13_1-debugsource-0:1-1.el9_0.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root"
    }
  ]
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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  • 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.