rhsa-2021_4600
Vulnerability from csaf_redhat
Published
2021-11-10 09:40
Modified
2024-11-06 00:08
Summary
Red Hat Security Advisory: annobin security update

Notes

Topic
An update for annobin is now available for Red Hat Enterprise Linux 8.2 Extended Update Support. 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
Annobin provides a compiler plugin to annotate and tools to examine compiled binary files. Security Fix(es): * Developer environment: Unicode's bidirectional (BiDi) override characters can cause trojan source attacks (CVE-2021-42574) The following changes were introduced in annobin in order to facilitate detection of BiDi Unicode characters: This update of annobin adds a new annocheck test to detect the presence of multibyte characters in symbol names. 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": [
            "Nicholas Boucher and Ross Anderson"
          ],
          "organization": "University of Cambridge"
        }
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      "cve": "CVE-2021-42574",
      "cwe": {
        "id": "CWE-838",
        "name": "Inappropriate Encoding for Output Context"
      },
      "discovery_date": "2021-09-20T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2005819"
        }
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the way Unicode standards are implemented in the context of development environments, which have specialized requirements for rendering text. An attacker could exploit this to deceive a human reviewer by creating a malicious patch containing well placed BiDi characters. The special handling and rendering of those characters can be then used in an attempt to hide unexpected and potentially dangerous behaviour from the reviewer.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "environment: Unicode\u0027s bidirectional (BiDi) override characters can cause trojan source attacks",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is a flaw with the way Unicode standards are implemented in the context of development environments, which have specialized requirements for rendering text. This is not a flaw in Red Hat products.",
          "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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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2021-42574"
        },
        {
          "category": "external",
          "summary": "RHBZ#2005819",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2005819"
        },
        {
          "category": "external",
          "summary": "RHSB-2021-007",
          "url": "https://access.redhat.com/security/vulnerabilities/RHSB-2021-007"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2021-42574",
          "url": "https://www.cve.org/CVERecord?id=CVE-2021-42574"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-42574",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-42574"
        },
        {
          "category": "external",
          "summary": "https://trojansource.codes/",
          "url": "https://trojansource.codes/"
        },
        {
          "category": "external",
          "summary": "https://www.lightbluetouchpaper.org/2021/11/01/trojan-source-invisible-vulnerabilities/",
          "url": "https://www.lightbluetouchpaper.org/2021/11/01/trojan-source-invisible-vulnerabilities/"
        },
        {
          "category": "external",
          "summary": "https://www.unicode.org/reports/tr36/#Bidirectional_Text_Spoofing",
          "url": "https://www.unicode.org/reports/tr36/#Bidirectional_Text_Spoofing"
        },
        {
          "category": "external",
          "summary": "https://www.unicode.org/reports/tr39/",
          "url": "https://www.unicode.org/reports/tr39/"
        }
      ],
      "release_date": "2021-11-01T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-11-10T09:40:26+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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            "AppStream-8.2.0.Z.EUS:annobin-debuginfo-0:8.90-1.el8_2.1.s390x",
            "AppStream-8.2.0.Z.EUS:annobin-debuginfo-0:8.90-1.el8_2.1.x86_64",
            "AppStream-8.2.0.Z.EUS:annobin-debugsource-0:8.90-1.el8_2.1.aarch64",
            "AppStream-8.2.0.Z.EUS:annobin-debugsource-0:8.90-1.el8_2.1.ppc64le",
            "AppStream-8.2.0.Z.EUS:annobin-debugsource-0:8.90-1.el8_2.1.s390x",
            "AppStream-8.2.0.Z.EUS:annobin-debugsource-0:8.90-1.el8_2.1.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:4600"
        },
        {
          "category": "workaround",
          "details": "This issue can be mitigated by ensuring code commits get a proper review. All new commits can also be scanned for the presence of BiDi characters before accepting the commit.",
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      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "environment: Unicode\u0027s bidirectional (BiDi) override characters can cause trojan source attacks"
    }
  ]
}


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