high
8.8
CWE
119 787
Advisory Published
Updated

CVE-2019-12527: Buffer Overflow

First published: Thu Jul 11 2019(Updated: )

An issue was discovered in Squid 4.0.23 through 4.7. When checking Basic Authentication with HttpHeader::getAuth, Squid uses a global buffer to store the decoded data. Squid does not check that the decoded length isn't greater than the buffer, leading to a heap-based buffer overflow with user controlled data.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Squid-Cache Squid>=4.0.23<=4.7
Fedoraproject Fedora=29
Debian Debian Linux=10.0
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.04
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux Eus=8.1
Redhat Enterprise Linux Eus=8.2
Redhat Enterprise Linux Eus=8.4
Redhat Enterprise Linux Eus=8.6
Redhat Enterprise Linux Server Aus=8.2
Redhat Enterprise Linux Server Aus=8.4
Redhat Enterprise Linux Server Aus=8.6
Redhat Enterprise Linux Server Tus=8.2
Redhat Enterprise Linux Server Tus=8.4
Redhat Enterprise Linux Server Tus=8.6
redhat/squid<4.8
4.8
ubuntu/squid<4.4-1ubuntu2.2
4.4-1ubuntu2.2
ubuntu/squid<4.8
4.8
debian/squid
4.6-1+deb10u7
4.6-1+deb10u10
4.13-10+deb11u2
5.7-2
6.6-1

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2019-12527?

    The severity of CVE-2019-12527 is high (8.8).

  • How does CVE-2019-12527 impact Squid?

    CVE-2019-12527 can lead to a heap-based buffer overflow in Squid.

  • Which versions of Squid are affected by CVE-2019-12527?

    Squid versions 4.0.23 through 4.7 are affected by CVE-2019-12527.

  • How can I fix CVE-2019-12527?

    Upgrade to Squid version 4.8 or apply the necessary patches provided by the vendor.

  • Where can I find more information about CVE-2019-12527?

    You can find more information about CVE-2019-12527 on the official Squid website and the GitHub repository of Squid.

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