RHSA-2021:4526

Vulnerability from csaf_redhat - Published: 2021-11-09 18:21 - Updated: 2026-04-30 04:04
Summary
Red Hat Security Advisory: mingw-glib2 security, bug fix, and enhancement update
Severity
Important
Notes
Topic: An update for mingw-glib2 is now available for Red Hat Enterprise Linux 8. 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: GLib provides the core application building blocks for libraries and applications written in C. It provides the core object system used in GNOME, the main loop implementation, and a large set of utility functions for strings and common data structures. The following packages have been upgraded to a later upstream version: mingw-glib2 (2.66.7). (BZ#1935248, BZ#1939111) Security Fix(es): * glib: integer overflow in g_bytes_new function on 64-bit platforms due to an implicit cast from 64 bits to 32 bits (CVE-2021-27219) * glib: integer overflow in g_byte_array_new_take function when called with a buffer of 4GB or more on a 64-bit platform (CVE-2021-27218) 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. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from 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.
CVE-2021-27218

An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. If g_byte_array_new_take() was called with a buffer of 4GB or more on a 64-bit platform, the length would be truncated modulo 2**32, causing unintended length truncation.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-190 - Integer Overflow or Wraparound
Affected products
Product Identifier Version Remediation
Unresolved product id: CRB-8.5.0.GA:mingw-glib2-0:2.66.7-2.el8.src —
Vendor Fix fix
Unresolved product id: CRB-8.5.0.GA:mingw32-glib2-0:2.66.7-2.el8.noarch —
Vendor Fix fix
Unresolved product id: CRB-8.5.0.GA:mingw32-glib2-debuginfo-0:2.66.7-2.el8.noarch —
Vendor Fix fix
Unresolved product id: CRB-8.5.0.GA:mingw32-glib2-static-0:2.66.7-2.el8.noarch —
Vendor Fix fix
Unresolved product id: CRB-8.5.0.GA:mingw64-glib2-0:2.66.7-2.el8.noarch —
Vendor Fix fix
Unresolved product id: CRB-8.5.0.GA:mingw64-glib2-debuginfo-0:2.66.7-2.el8.noarch —
Vendor Fix fix
Unresolved product id: CRB-8.5.0.GA:mingw64-glib2-static-0:2.66.7-2.el8.noarch —
Vendor Fix fix
Threats
Impact Moderate
CVE-2021-27219

An integer wraparound was discovered in glib due to passing a 64 bit sized value to function g_memdup() which accepts a 32 bits number as argument. An attacker may abuse this flaw when an application linked against the glib library uses g_bytes_new() function or possibly other functions that use g_memdup() underneath and accept a 64 bits argument as size. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-190 - Integer Overflow or Wraparound
Affected products
Product Identifier Version Remediation
Unresolved product id: CRB-8.5.0.GA:mingw-glib2-0:2.66.7-2.el8.src —
Vendor Fix fix
Unresolved product id: CRB-8.5.0.GA:mingw32-glib2-0:2.66.7-2.el8.noarch —
Vendor Fix fix
Unresolved product id: CRB-8.5.0.GA:mingw32-glib2-debuginfo-0:2.66.7-2.el8.noarch —
Vendor Fix fix
Unresolved product id: CRB-8.5.0.GA:mingw32-glib2-static-0:2.66.7-2.el8.noarch —
Vendor Fix fix
Unresolved product id: CRB-8.5.0.GA:mingw64-glib2-0:2.66.7-2.el8.noarch —
Vendor Fix fix
Unresolved product id: CRB-8.5.0.GA:mingw64-glib2-debuginfo-0:2.66.7-2.el8.noarch —
Vendor Fix fix
Unresolved product id: CRB-8.5.0.GA:mingw64-glib2-static-0:2.66.7-2.el8.noarch —
Vendor Fix fix
Threats
Impact Important
References
To clipboard 

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          "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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        "id": "CWE-190",
        "name": "Integer Overflow or Wraparound"
      },
      "discovery_date": "2021-02-14T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1929858"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "An integer wraparound was discovered in glib due to passing a 64 bit sized value to function g_memdup() which accepts a 32 bits number as argument. An attacker may abuse this flaw when an application linked against the glib library uses g_bytes_new() function or possibly other functions that use g_memdup() underneath and accept a 64 bits argument as size. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "glib: integer overflow in g_bytes_new function on 64-bit platforms due to an implicit cast from 64 bits to 32 bits",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Applications that just use GBytes to access the data are affected by this flaw but the highest threat is to data confidentiality and/or the application availability, due to possible out-of-bounds reads. However, if the data in GBytes is taken through functions such as g_bytes_unref_to_data or g_bytes_unref_to_array it might be possible to have out-of-bounds writes due to the wrongly reported size of the buffer.\n\nApplications that use g_memdup to duplicate memory with user-controlled sizes should pay extra attention to the fact that g_memdup accepts a guint size instead of gsize. Thus directly passing a gsize value to g_memdup may results in integer truncation, allocating a buffer smaller than expected.",
          "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"
        }
      ],
      "product_status": {
        "fixed": [
          "CRB-8.5.0.GA:mingw-glib2-0:2.66.7-2.el8.src",
          "CRB-8.5.0.GA:mingw32-glib2-0:2.66.7-2.el8.noarch",
          "CRB-8.5.0.GA:mingw32-glib2-debuginfo-0:2.66.7-2.el8.noarch",
          "CRB-8.5.0.GA:mingw32-glib2-static-0:2.66.7-2.el8.noarch",
          "CRB-8.5.0.GA:mingw64-glib2-0:2.66.7-2.el8.noarch",
          "CRB-8.5.0.GA:mingw64-glib2-debuginfo-0:2.66.7-2.el8.noarch",
          "CRB-8.5.0.GA:mingw64-glib2-static-0:2.66.7-2.el8.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2021-27219"
        },
        {
          "category": "external",
          "summary": "RHBZ#1929858",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1929858"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2021-27219",
          "url": "https://www.cve.org/CVERecord?id=CVE-2021-27219"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-27219",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-27219"
        }
      ],
      "release_date": "2021-02-04T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-11-09T18:21:41+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",
          "product_ids": [
            "CRB-8.5.0.GA:mingw-glib2-0:2.66.7-2.el8.src",
            "CRB-8.5.0.GA:mingw32-glib2-0:2.66.7-2.el8.noarch",
            "CRB-8.5.0.GA:mingw32-glib2-debuginfo-0:2.66.7-2.el8.noarch",
            "CRB-8.5.0.GA:mingw32-glib2-static-0:2.66.7-2.el8.noarch",
            "CRB-8.5.0.GA:mingw64-glib2-0:2.66.7-2.el8.noarch",
            "CRB-8.5.0.GA:mingw64-glib2-debuginfo-0:2.66.7-2.el8.noarch",
            "CRB-8.5.0.GA:mingw64-glib2-static-0:2.66.7-2.el8.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:4526"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CRB-8.5.0.GA:mingw-glib2-0:2.66.7-2.el8.src",
            "CRB-8.5.0.GA:mingw32-glib2-0:2.66.7-2.el8.noarch",
            "CRB-8.5.0.GA:mingw32-glib2-debuginfo-0:2.66.7-2.el8.noarch",
            "CRB-8.5.0.GA:mingw32-glib2-static-0:2.66.7-2.el8.noarch",
            "CRB-8.5.0.GA:mingw64-glib2-0:2.66.7-2.el8.noarch",
            "CRB-8.5.0.GA:mingw64-glib2-debuginfo-0:2.66.7-2.el8.noarch",
            "CRB-8.5.0.GA:mingw64-glib2-static-0:2.66.7-2.el8.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "glib: integer overflow in g_bytes_new function on 64-bit platforms due to an implicit cast from 64 bits to 32 bits"
    }
  ]
}


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Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.



Detection rules are retrieved from Rulezet.