CVE-2023-46724

Squid is a caching proxy for the Web. 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. This bug is fixed in Squid version 6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. Those who you use a prepackaged version of Squid should refer to the package vendor for availability information on updated packages.

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 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. This bug is fixed in Squid version 6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. Those who you use a prepackaged version of Squid should refer to the package vendor for availability information on updated packages.(CVE-2023-46724)

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests.(CVE-2023-46728)

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

Security Fix(es):

• squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)

• squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)

• squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)

• squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286)

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 caching proxy for the Web. 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. This bug is fixed in Squid version 6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. Those who you use a prepackaged version of Squid should refer to the package vendor for availability information on updated packages.

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

Security Fix(es):

• squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)
• squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)
• squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)
• squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286)

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: Denial of Service in SSL Certificate validation (CVE-2023-46724)
• squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)
• squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)
• squid: Incorrect Check of Function Return Value In Helper Process management (CVE-2023-49286)

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-2023-46724: Fix validation of certificates with CN=*

• CVE-2023-46724: Fix validation of certificates with CN=*

• CVE-2023-46724: Fix validation of certificates with CN=*

• CVE-2023-46724: Fix validation of certificates with CN=*

• CVE-2023-46724: fix validation of certificates with CN=*

• SECURITY UPDATE: potential Denial of Service via TLS connection
  • debian/patches/CVE-2020-14058.patch: Fix sending of unknown validation errors to cert validator
  • CVE-2020-14058
• SECURITY UPDATE: improper Validation of Specified Index leads to Denial of Service via TLS Handshake vulnerability
  • debian/patches/CVE-2023-46724.patch: Fix validation of certificates with CN=* due to Buffer UnderRead in SSL CN Parsing issue (#1523)
  • CVE-2023-46724
• SECURITY UPDATE: denial of Service vulnerability in HTTP Chunked decoder due to uncontrolled recursion bug
  • debian/patches/CVE-2024-25111.patch: Fix infinite recursion when parsing HTTP chunks, prevent progress in call chain by stopping HttpStateData recursion
  • CVE-2024-25111
• SECURITY UPDATE: denial of Service vulnerability in the NTLM authentication credentials parser due to incorrect input validation
  • debian/patches/CVE-2020-8517.patch: Fix incorrect input validation allowing writing outside of buffer and leading to denial of service
  • CVE-2020-8517
• SECURITY UPDATE: denial of Service vulnerability against HTTP header parsing due to a Collapse of Data into Unsafe Value
  • debian/patches/CVE-2024-25617.patch: Improve handling of expanding HTTP header values to prevent DoS
  • CVE-2024-25617
• SECURITY UPDATE: denial of Service vulnerability by a trusted server
  • debian/rules: Disable ESI due to unfixed multiple issues in ESI causing DoS by a trusted server
  • debian/control: Remove dependencies used by ESI
  • CVE-2024-45802

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-6.4-1.1 package on the GA media of openSUSE Tumbleweed.

Root has patched CVE-2023-46724 in the squid package for Root:Alpine:3.18. Multiple fixed versions available.

This update for squid fixes the following issues:

• CVE-2023-46846: Request/Response smuggling in HTTP/1.1 and ICAP (bsc#1216500).
• CVE-2023-46847: Denial of Service in HTTP Digest Authentication (bsc#1216495).
• CVE-2023-46724: Fix validation of certificates with CN=* (bsc#1216803).
• CVE-2023-46848: Denial of Service in FTP (bsc#1216498).

This update for squid fixes the following issues:

• CVE-2023-46846: Request/Response smuggling in HTTP/1.1 and ICAP (bsc#1216500).
• CVE-2023-46847: Denial of Service in HTTP Digest Authentication (bsc#1216495).
• CVE-2023-46724: Fix validation of certificates with CN=* (bsc#1216803).
• CVE-2023-46848: Denial of Service in FTP (bsc#1216498).

This update for squid fixes the following issues:

• CVE-2023-46846: Request/Response smuggling in HTTP/1.1 and ICAP (bsc#1216500).
• CVE-2023-46847: Denial of Service in HTTP Digest Authentication (bsc#1216495).
• CVE-2023-46724: Fix validation of certificates with CN=* (bsc#1216803).
• CVE-2023-46848: Denial of Service in FTP (bsc#1216498).

Joshua Rogers discovered that Squid incorrectly handled validating certain SSL certificates. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 23.04, and Ubuntu 23.10. (CVE-2023-46724)

Joshua Rogers discovered that Squid incorrectly handled the Gopher protocol. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. Gopher support has been disabled in this update. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-46728)

Keran Mu and Jianjun Chen discovered that Squid incorrectly handled the chunked decoder. A remote attacker could possibly use this issue to perform HTTP request smuggling attacks. (CVE-2023-46846)

Joshua Rogers discovered that Squid incorrectly handled HTTP Digest Authentication. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2023-46847)

Joshua Rogers discovered that Squid incorrectly handled certain FTP urls. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. (CVE-2023-46848)