RHSA-2020:4743: squid:4 security, bug fix, and enhancement update (Moderate)
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 Red Hat Enterprise Linux 8.3 Release Notes linked from the References section.