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    CVE-2021-28651

    An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of memory consumption.

    Published:May 10, 2021
    Last Modified:Nov 21, 2024
    EPS:May 27, 2021
    EPSS Score:0.03292
    CVSS Score:7.5

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Netapp
    Product
    Cloud Manager
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Squid-cache
    Product
    Squid

    Exploits

    https://bugs.squid-cache.org/show_bug.cgi?id=5104https://bugs.squid-cache.org/show_bug.cgi?id=5104

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    References

    http://seclists.org/fulldisclosure/2023/Oct/14
    http://www.openwall.com/lists/oss-security/2023/10/11/3
    https://bugs.squid-cache.org/show_bug.cgi?id=5104
    https://github.com/squid-cache/squid/security/advisories/GHSA-ch36-9jhx-phm4
    https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/
    https://security.netapp.com/advisory/ntap-20210716-0007/
    https://www.debian.org/security/2021/dsa-4924
    http://seclists.org/fulldisclosure/2023/Oct/14
    http://www.openwall.com/lists/oss-security/2023/10/11/3
    https://bugs.squid-cache.org/show_bug.cgi?id=5104
    https://github.com/squid-cache/squid/security/advisories/GHSA-ch36-9jhx-phm4
    https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/
    https://security.netapp.com/advisory/ntap-20210716-0007/
    https://www.debian.org/security/2021/dsa-4924

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High