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CVE-2023-46724

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2024-1787-03
Posted Apr 12, 2024
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2024-1787-03 - An update for squid is now available for Red Hat Enterprise Linux 7. Issues addressed include buffer over-read, denial of service, and null pointer vulnerabilities.

tags | advisory, denial of service, vulnerability
systems | linux, redhat
advisories | CVE-2023-46724
SHA-256 | 015523c72701c6b4ebda8d02b7728a2600a97d861a8fdfed0767aa6829228f17
Debian Security Advisory 5637-1
Posted Mar 8, 2024
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5637-1 - Several security vulnerabilities have been discovered in Squid, a full featured web proxy cache. Due to programming errors in Squid's HTTP request parsing, remote attackers may be able to execute a denial of service attack by sending large X-Forwarded-For header or trigger a stack buffer overflow while performing HTTP Digest authentication. Other issues facilitate request smuggling past a firewall or a denial of service against Squid's Helper process management.

tags | advisory, remote, web, denial of service, overflow, vulnerability
systems | linux, debian
advisories | CVE-2023-46724, CVE-2023-46846, CVE-2023-46847, CVE-2023-46848, CVE-2023-49285, CVE-2023-49286, CVE-2023-50269, CVE-2024-23638, CVE-2024-25111, CVE-2024-25617
SHA-256 | a79ef3e7a5505aef83c8e1d9026a34f64acecaa9ccd3e41b225ac5500d8a96e7
Red Hat Security Advisory 2024-0071-03
Posted Jan 8, 2024
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2024-0071-03 - An update for squid is now available for Red Hat Enterprise Linux 9. Issues addressed include buffer over-read, denial of service, and null pointer vulnerabilities.

tags | advisory, denial of service, vulnerability
systems | linux, redhat
advisories | CVE-2023-46724
SHA-256 | c29a5969c83608ca63e62dc35c5b5f4b5554c3c94416e338eb7ef3a07039781e
Red Hat Security Advisory 2024-0046-03
Posted Jan 4, 2024
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2024-0046-03 - An update for the squid:4 module is now available for Red Hat Enterprise Linux 8. Issues addressed include buffer over-read, denial of service, and null pointer vulnerabilities.

tags | advisory, denial of service, vulnerability
systems | linux, redhat
advisories | CVE-2023-46724
SHA-256 | 3b77ce6f5549c8dc4d8b8838e40f6891b9bdd54ee8ae065b2c0e881c9ca4f9b3
Ubuntu Security Notice USN-6500-1
Posted Nov 22, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6500-1 - 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. 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.

tags | advisory, remote, denial of service, protocol
systems | linux, ubuntu
advisories | CVE-2023-46724, CVE-2023-46728, CVE-2023-46846, CVE-2023-46847, CVE-2023-46848
SHA-256 | 89e080ec0dca666e58acac5a17ad942076e2d2723e487a8ff043ca16623f5d78
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