CVE-2024-23638

Squid is a high-performance proxy caching server. It handles all requests in a single, non-blocking, I/O-driven process and keeps meta data and implements negative caching of failed requests.

Security Fix(es):

Squid is a caching proxy for the Web. Due to an expired pointer reference bug, Squid prior to version 6.6 is vulnerable to a Denial of Service attack against Cache Manager error responses. This problem allows a trusted client to perform Denial of Service when generating error pages for Client Manager reports. Squid older than 5.0.5 have not been tested and should be assumed to be vulnerable. All Squid-5.x up to and including 5.9 are vulnerable. All Squid-6.x up to and including 6.5 are vulnerable. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. As a workaround, prevent access to Cache Manager using Squid's main access control: http_access deny manager.(CVE-2024-23638)

Squid is a caching proxy for the Web. Due to an expired pointer reference bug, Squid prior to version 6.6 is vulnerable to a Denial of Service attack against Cache Manager error responses. This problem allows a trusted client to perform Denial of Service when generating error pages for Client Manager reports. Squid older than 5.0.5 have not been tested and should be assumed to be vulnerable. All Squid-5.x up to and including 5.9 are vulnerable. All Squid-6.x up to and including 6.5 are vulnerable. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. As a workaround, prevent access to Cache Manager using Squid's main access control: http_access deny manager.

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

Security Fix(es):

• squid: vulnerable to a Denial of Service attack against Cache Manager error responses (CVE-2024-23638)
• squid: Out-of-bounds write error may lead to Denial of Service (CVE-2024-37894)

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.

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

Security Fix(es):

• squid: vulnerable to a Denial of Service attack against Cache Manager error responses (CVE-2024-23638)
• squid: Denial of Service processing ESI response content (CVE-2024-45802)

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.

• CVE-2024-23638: Fix expired pointer reference bug to prevent Denial of Service attack

• CVE-2024-23638: Do not update StoreEntry expiration after errorAppendEntry()

• CVE-2024-23638: Do not update StoreEntry expiration after errorAppendEntry()

• CVE-2024-23638: Fix Denial of Service attack against Cache Manager error responses
• CVE-2024-37894: Fix Out-of-bounds Write error when assigning ESI variables

Due to an Improper Validation of Specified Index bug, Squid versions 3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using --with-openssl are vulnerable to a Denial of Service attack against SSL Certificate validation. This problem allows a remote server to perform Denial of Service against Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a server certificate chain. This attack is limited to HTTPS and SSL-Bump. (CVE-2023-46724) Due to a Buffer Overread bug Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. (CVE-2023-49285) Due to an Incorrect Check of Function Return Value bug Squid is vulnerable to a Denial of Service attack against its Helper process management. (CVE-2023-49286) Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. (CVE-2023-50269) Due to an expired pointer reference bug, Squid prior to version 6.6 is vulnerable to a Denial of Service attack against Cache Manager error responses. This problem allows a trusted client to perform Denial of Service when generating error pages for Client Manager reports. (CVE-2024-23638) Starting in version 3.5.27 and prior to version 6.8, Squid may be vulnerable to a Denial of Service attack against HTTP Chunked decoder due to an uncontrolled recursion bug. This problem allows a remote attacker to cause Denial of Service when sending a crafted, chunked, encoded HTTP Message. (CVE-2024-25111) Due to a Collapse of Data into Unsafe Value bug ,Squid may be vulnerable to a Denial of Service attack against HTTP header parsing. This problem allows a remote client or a remote server to perform Denial of Service when sending oversized headers in HTTP messages. In versions of Squid prior to 6.5 this can be achieved if the request_header_max_size or reply_header_max_size settings are unchanged from the default. (CVE-2024-25617)

These are all security issues fixed in the squid-6.6-2.1 package on the GA media of openSUSE Tumbleweed.

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

Security Fix(es):

• squid: vulnerable to a Denial of Service attack against Cache Manager error responses (CVE-2024-23638)

• squid: Out-of-bounds write error may lead to Denial of Service (CVE-2024-37894)

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.

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

Security Fix(es):

• squid: vulnerable to a Denial of Service attack against Cache Manager error responses (CVE-2024-23638)

• squid: Denial of Service processing ESI response content (CVE-2024-45802)

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.

Root has patched CVE-2024-23638 in the squid package for Root:Alpine:3.18. Multiple fixed versions available.

This update for squid fixes the following issues:

• CVE-2023-50269: fixed X-Forwarded-For Stack Overflow. (bsc#1217654)
• CVE-2024-23638: fixed Denial of Service attack against Cache Manager error responses. (bsc#1219131)

This update for squid fixes the following issues:

• CVE-2023-50269: fixed X-Forwarded-For Stack Overflow. (bsc#1217654)
• CVE-2024-23638: fixed Denial of Service attack against Cache Manager error responses. (bsc#1219131)

This update for squid fixes the following issues:

• CVE-2023-50269: fixed X-Forwarded-For Stack Overflow. (bsc#1217654)
• CVE-2024-23638: fixed Denial of Service attack against Cache Manager error responses. (bsc#1219131)

Joshua Rogers discovered that Squid incorrectly handled collapsed forwarding. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-49288)

Joshua Rogers discovered that Squid incorrectly handled certain structural elements. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2023-5824)

Joshua Rogers discovered that Squid incorrectly handled Cache Manager error responses. A remote trusted client can possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2024-23638)

Joshua Rogers discovered that Squid incorrectly handled the HTTP Chunked decoder. A remote attacker could possibly use this issue to cause Squid to stop responding, resulting in a denial of service. (CVE-2024-25111)

Joshua Rogers discovered that Squid incorrectly handled HTTP header parsing. A remote trusted client can possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2024-25617)