Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Squid-Cache | Squid | >= 4.0.23, <= 4.7 |
| Fedoraproject | Fedora | 29 |
| Debian | Debian Linux | 10.0 |
| Canonical | Ubuntu Linux | 16.04 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux Eus | 8.1 |
| Redhat | Enterprise Linux Server Aus | 8.2 |
| Redhat | Enterprise Linux Server Tus | 8.2 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.htmlBroken Link
- http://www.securityfocus.com/bid/109143Broken LinkThird Party AdvisoryVDB Entry
- http://www.squid-cache.org/Versions/v4/changesets/Vendor Advisory
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-7f73e9c5d17664b882ed32PatchVendor Advisory
- https://access.redhat.com/errata/RHSA-2019:2593Third Party Advisory
- https://github.com/squid-cache/squid/commits/v4PatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://seclists.org/bugtraq/2019/Aug/42Mailing ListThird Party Advisory
- https://usn.ubuntu.com/4065-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4507Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.htmlBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.htmlBroken Link
- http://www.securityfocus.com/bid/109143Broken LinkThird Party AdvisoryVDB Entry
- http://www.squid-cache.org/Versions/v4/changesets/Vendor Advisory
FAQ
What is CVE-2019-12527?
CVE-2019-12527 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 de...
How severe is CVE-2019-12527?
CVE-2019-12527 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-12527?
Check the references section above for vendor advisories and patch information. Affected products include: Squid-Cache Squid, Fedoraproject Fedora, Debian Debian Linux, Canonical Ubuntu Linux, Redhat Enterprise Linux.