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    CVE-2023-46724

    Squid is a caching proxy for the Web. Due to an Improper Validation of Specified Index bug, Squid versions 3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using `--with-openssl` are vulnerable to a Denial of Service attack against SSL Certificate validation. This problem allows a remote server to perform Denial of Service against Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a server certificate chain. This attack is limited to HTTPS and SSL-Bump. This bug is fixed in Squid version 6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. Those who you use a prepackaged version of Squid should refer to the package vendor for availability information on updated packages.

    Published:Nov 1, 2023
    Last Modified:Feb 13, 2025
    EPS:Nov 1, 2023
    EPSS Score:0.00793
    CVSS Score:8.6

    Affected Products

    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    Squid-cache
    Product
    Squid

    Exploits

    No exploit reference

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    References

    http://www.squid-cache.org/Versions/v5/SQUID-2023_4.patch
    http://www.squid-cache.org/Versions/v6/SQUID-2023_4.patch
    https://github.com/squid-cache/squid/commit/b70f864940225dfe69f9f653f948e787f99c3810
    https://github.com/squid-cache/squid/security/advisories/GHSA-73m6-jm96-c6r3
    https://lists.fedoraproject.org/archives/list/[email protected]/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/
    https://security.netapp.com/advisory/ntap-20231208-0001/
    http://www.squid-cache.org/Versions/v5/SQUID-2023_4.patch
    http://www.squid-cache.org/Versions/v6/SQUID-2023_4.patch
    https://github.com/squid-cache/squid/commit/b70f864940225dfe69f9f653f948e787f99c3810
    https://github.com/squid-cache/squid/security/advisories/GHSA-73m6-jm96-c6r3
    https://lists.fedoraproject.org/archives/list/[email protected]/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/
    https://security.netapp.com/advisory/ntap-20231208-0001/

    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