CVE-2021-31807

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. An integer overflow problem allows a remote server to achieve Denial of Service when delivering responses to HTTP Range requests. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent.

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to an input-validation bug, it is vulnerable to a Denial of Service attack (against all clients using the proxy). A client sends an HTTP Range request to trigger this.

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. An integer overflow problem allows a remote server to achieve Denial of Service when delivering responses to HTTP Range requests. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent.

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 (4.15). (BZ#1964384)

Security Fix(es):

• squid: denial of service in URN processing (CVE-2021-28651)

• squid: denial of service issue in Cache Manager (CVE-2021-28652)

• squid: denial of service in HTTP response processing (CVE-2021-28662)

• squid: improper input validation in HTTP Range header (CVE-2021-31806)

• squid: incorrect memory management in HTTP Range header (CVE-2021-31807)

• squid: integer overflow in HTTP Range header (CVE-2021-31808)

• squid: denial of service in HTTP response processing (CVE-2021-33620)

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 Rocky Linux 8.5 Release Notes linked from the References section.

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. An integer overflow problem allows a remote server to achieve Denial of Service when delivering responses to HTTP Range requests. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent.

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 (4.15). (BZ#1964384)

Security Fix(es):

• squid: denial of service in URN processing (CVE-2021-28651)

• squid: denial of service issue in Cache Manager (CVE-2021-28652)

• squid: denial of service in HTTP response processing (CVE-2021-28662)

• squid: improper input validation in HTTP Range header (CVE-2021-31806)

• squid: incorrect memory management in HTTP Range header (CVE-2021-31807)

• squid: integer overflow in HTTP Range header (CVE-2021-31808)

• squid: denial of service in HTTP response processing (CVE-2021-33620)

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.

• CVE-2021-28651: Fix memory leak that perform DoS via buffer-management bug
• CVE-2021-28652: Fix cache manager URL parsing that perform DoS via incorrect parser validation
• CVE-2021-28662: Add limit HeaderLookupTable_t::lookup() to BadHdr and specific IDs that perform DoS via certain response header
• CVE-2021-31806: Add handling more partial responses that perform DoS via HTTP Range request
• CVE-2021-31807: Add handling more partial responses that perform DoS via HTTP Range request
• CVE-2021-31808: Add handling more partial responses that perform DoS via HTTP Range request
• CVE-2021-33620: Add handling more partial responses that perform DoS via HTTP response

• CVE-2021-28651: fix memory leak in RFC 2169 response parsing
• CVE-2021-28652: fix broken cache manager URL parsing
• CVE-2021-31806: fix memory management bug
• CVE-2021-31807: fix integer overflow problem
• CVE-2021-31808: fix input validation bug
• CVE-2021-33620: handle more partial responses

Updated squid packages fix security vulnerabilities:

Due to improper input validation Squid is vulnerable to an HTTP Request Smuggling attack. This problem allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by Squid security controls (CVE-2020-25097).

Joshua Rogers discovered that Squid incorrectly handled requests with the urn: scheme. A remote attacker could possibly use this issue to causeSquid to consume resources, leading to a denial of service (CVE-2021-28651).

Joshua Rogers discovered that Squid incorrectly handled requests to the Cache Manager API. A remote attacker with access privileges could possibly use this issue to cause Squid to consume resources, leading to a denial of service (CVE-2021-28652).

Joshua Rogers discovered that Squid incorrectly handled certain response headers. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service (CVE-2021-28662).

Joshua Rogers discovered that Squid incorrectly handled range request processing. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service (CVE-2021-31806, CVE-2021-31807, CVE-2021-31808).

Joshua Rogers discovered that Squid incorrectly handled certain HTTP responses. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service (CVE-2021-33620).

The squid package has been updated to version 4.15, fixing theese issues and other bugs.

Joshua Rogers discovered that Squid incorrectly handled requests with the urn: scheme. A remote attacker could possibly use this issue to cause Squid to consume resources, leading to a denial of service. (CVE-2021-28651)

Joshua Rogers discovered that Squid incorrectly handled requests to the Cache Manager API. A remote attacker with access privileges could possibly use this issue to cause Squid to consume resources, leading to a denial of service. This issue was only addressed in Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04. (CVE-2021-28652)

Joshua Rogers discovered that Squid incorrectly handled certain response headers. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. This issue was only affected Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04. (CVE-2021-28662)

Joshua Rogers discovered that Squid incorrectly handled range request processing. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2021-31806, CVE-2021-31807, CVE-2021-31808)

Joshua Rogers discovered that Squid incorrectly handled certain HTTP responses. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2021-33620)