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OpenAdvisories
Medium ALSA-2020:4743 18 CVEs

Moderate: squid:4 security, bug fix, and enhancement update

Published Nov 3, 2020 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.

The following packages have been upgraded to a later upstream version: squid (4.11). (BZ#1829467)

Security Fix(es):

* squid: Improper input validation in request allows for proxy manipulation (CVE-2019-12520)

* squid: Off-by-one error in addStackElement allows for heap buffer overflow and crash (CVE-2019-12521)

* squid: Improper input validation in URI processor (CVE-2019-12523)

* squid: Improper access restriction in url_regex may lead to security bypass (CVE-2019-12524)

* squid: Heap overflow issue in URN processing (CVE-2019-12526)

* squid: Information Disclosure issue in FTP Gateway (CVE-2019-12528)

* squid: Out of bounds read in Proxy-Authorization header causes DoS (CVE-2019-12529)

* squid: Denial of service in cachemgr.cgi (CVE-2019-12854)

* squid: Buffer overflow in URI processor (CVE-2019-18676)

* squid: Cross-Site Request Forgery issue in HTTP Request processing (CVE-2019-18677)

* squid: HTTP Request Splitting issue in HTTP message processing (CVE-2019-18678)

* squid: Information Disclosure issue in HTTP Digest Authentication (CVE-2019-18679)

* squid: Mishandled HTML in the host parameter to cachemgr.cgi results in insecure behaviour (CVE-2019-18860)

* squid: Improper input validation issues in HTTP Request processing (CVE-2020-8449)

* squid: Buffer overflow in reverse-proxy configurations (CVE-2020-8450)

* squid: DoS in TLS handshake (CVE-2020-14058)

* squid: Request smuggling and poisoning attack against the HTTP cache (CVE-2020-15049)

* squid: Improper input validation could result in a DoS (CVE-2020-24606)

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 AlmaLinux Release Notes linked from the References section.

Fixed packages 2

ReleasePackageFixed in
AlmaLinux · 8 libecap 1.0.1-2.module_el8.6.0+2741+01592ae8
AlmaLinux · 8 libecap-devel 1.0.1-2.module_el8.6.0+2741+01592ae8

Vulnerabilities 18

References

  • report
    https://vulners.com/cve/CVE-2019-12520
  • report
    https://vulners.com/cve/CVE-2019-12521
  • report
    https://vulners.com/cve/CVE-2019-12523
  • report
    https://vulners.com/cve/CVE-2019-12524
  • report
    https://vulners.com/cve/CVE-2019-12526
  • report
    https://vulners.com/cve/CVE-2019-12528
  • report
    https://vulners.com/cve/CVE-2019-12529
  • report
    https://vulners.com/cve/CVE-2019-12854
  • report
    https://vulners.com/cve/CVE-2019-18676
  • report
    https://vulners.com/cve/CVE-2019-18677
  • report
    https://vulners.com/cve/CVE-2019-18678
  • report
    https://vulners.com/cve/CVE-2019-18679
  • report
    https://vulners.com/cve/CVE-2019-18860
  • report
    https://vulners.com/cve/CVE-2020-14058
  • report
    https://vulners.com/cve/CVE-2020-15049
  • report
    https://vulners.com/cve/CVE-2020-24606
  • report
    https://vulners.com/cve/CVE-2020-8449
  • report
    https://vulners.com/cve/CVE-2020-8450