Filtered by vendor Squid-cache
Subscribe
Total
111 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2019-12522 | 1 Squid-cache | 1 Squid | 2026-06-17 | 4.4 MEDIUM | 4.5 MEDIUM |
| An issue was discovered in Squid through 4.7. When Squid is run as root, it spawns its child processes as a lesser user, by default the user nobody. This is done via the leave_suid call. leave_suid leaves the Saved UID as 0. This makes it trivial for an attacker who has compromised the child process to escalate their privileges back to root. | |||||
| CVE-2019-12521 | 4 Canonical, Debian, Opensuse and 1 more | 4 Ubuntu Linux, Debian Linux, Leap and 1 more | 2026-06-17 | 4.3 MEDIUM | 5.9 MEDIUM |
| An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing. | |||||
| CVE-2019-12520 | 3 Canonical, Debian, Squid-cache | 3 Ubuntu Linux, Debian Linux, Squid | 2026-06-17 | 5.0 MEDIUM | 7.5 HIGH |
| An issue was discovered in Squid through 4.7 and 5. When receiving a request, Squid checks its cache to see if it can serve up a response. It does this by making a MD5 hash of the absolute URL of the request. If found, it servers the request. The absolute URL can include the decoded UserInfo (username and password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to provide a username that has special characters to delimit the domain, and treat the rest of the URL as a path or query string. An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker's HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI. | |||||
| CVE-2019-12519 | 4 Canonical, Debian, Opensuse and 1 more | 4 Ubuntu Linux, Debian Linux, Leap and 1 more | 2026-06-17 | 7.5 HIGH | 9.8 CRITICAL |
| An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow. | |||||
| CVE-2018-1172 | 1 Squid-cache | 1 Squid | 2026-06-17 | 4.3 MEDIUM | 5.9 MEDIUM |
| This vulnerability allows remote attackers to deny service on vulnerable installations of The Squid Software Foundation Squid 3.5.27-20180318. Authentication is not required to exploit this vulnerability. The specific flaw exists within ClientRequestContext::sslBumpAccessCheck(). A crafted request can trigger the dereference of a null pointer. An attacker can leverage this vulnerability to create a denial-of-service condition to users of the system. Was ZDI-CAN-6088. | |||||
| CVE-2018-19132 | 2 Debian, Squid-cache | 2 Debian Linux, Squid | 2026-06-17 | 4.3 MEDIUM | 5.9 MEDIUM |
| Squid before 4.4, when SNMP is enabled, allows a denial of service (Memory Leak) via an SNMP packet. | |||||
| CVE-2018-19131 | 1 Squid-cache | 1 Squid | 2026-06-17 | 4.3 MEDIUM | 6.1 MEDIUM |
| Squid before 4.4 has XSS via a crafted X.509 certificate during HTTP(S) error page generation for certificate errors. | |||||
| CVE-2018-1000027 | 3 Canonical, Debian, Squid-cache | 3 Ubuntu Linux, Debian Linux, Squid | 2026-06-17 | 5.0 MEDIUM | 7.5 HIGH |
| The Squid Software Foundation Squid HTTP Caching Proxy version prior to version 4.0.23 contains a NULL Pointer Dereference vulnerability in HTTP Response X-Forwarded-For header processing that can result in Denial of Service to all clients of the proxy. This attack appear to be exploitable via Remote HTTP server responding with an X-Forwarded-For header to certain types of HTTP request. This vulnerability appears to have been fixed in 4.0.23 and later. | |||||
| CVE-2018-1000024 | 3 Canonical, Debian, Squid-cache | 3 Ubuntu Linux, Debian Linux, Squid | 2026-06-17 | 5.0 MEDIUM | 7.5 HIGH |
| The Squid Software Foundation Squid HTTP Caching Proxy version 3.0 to 3.5.27, 4.0 to 4.0.22 contains a Incorrect Pointer Handling vulnerability in ESI Response Processing that can result in Denial of Service for all clients using the proxy.. This attack appear to be exploitable via Remote server delivers an HTTP response payload containing valid but unusual ESI syntax.. This vulnerability appears to have been fixed in 4.0.23 and later. | |||||
| CVE-2016-4556 | 3 Canonical, Oracle, Squid-cache | 3 Ubuntu Linux, Linux, Squid | 2026-06-17 | 5.0 MEDIUM | 7.5 HIGH |
| Double free vulnerability in Esi.cc in Squid 3.x before 3.5.18 and 4.x before 4.0.10 allows remote servers to cause a denial of service (crash) via a crafted Edge Side Includes (ESI) response. | |||||
| CVE-2016-4555 | 3 Canonical, Oracle, Squid-cache | 3 Ubuntu Linux, Linux, Squid | 2026-06-17 | 5.0 MEDIUM | 7.5 HIGH |
| client_side_request.cc in Squid 3.x before 3.5.18 and 4.x before 4.0.10 allows remote servers to cause a denial of service (crash) via crafted Edge Side Includes (ESI) responses. | |||||
| CVE-2016-4554 | 3 Canonical, Oracle, Squid-cache | 3 Ubuntu Linux, Linux, Squid | 2026-06-17 | 5.0 MEDIUM | 8.6 HIGH |
| mime_header.cc in Squid before 3.5.18 allows remote attackers to bypass intended same-origin restrictions and possibly conduct cache-poisoning attacks via a crafted HTTP Host header, aka a "header smuggling" issue. | |||||
| CVE-2016-4553 | 3 Canonical, Oracle, Squid-cache | 3 Ubuntu Linux, Linux, Squid | 2026-06-17 | 5.0 MEDIUM | 8.6 HIGH |
| client_side.cc in Squid before 3.5.18 and 4.x before 4.0.10 does not properly ignore the Host header when absolute-URI is provided, which allows remote attackers to conduct cache-poisoning attacks via an HTTP request. | |||||
| CVE-2016-4054 | 3 Canonical, Oracle, Squid-cache | 3 Ubuntu Linux, Linux, Squid | 2026-06-17 | 6.8 MEDIUM | 8.1 HIGH |
| Buffer overflow in Squid 3.x before 3.5.17 and 4.x before 4.0.9 allows remote attackers to execute arbitrary code via crafted Edge Side Includes (ESI) responses. | |||||
| CVE-2016-4053 | 3 Canonical, Oracle, Squid-cache | 3 Ubuntu Linux, Linux, Squid | 2026-06-17 | 4.3 MEDIUM | 3.7 LOW |
| Squid 3.x before 3.5.17 and 4.x before 4.0.9 allow remote attackers to obtain sensitive stack layout information via crafted Edge Side Includes (ESI) responses, related to incorrect use of assert and compiler optimization. | |||||
| CVE-2016-4052 | 2 Canonical, Squid-cache | 2 Ubuntu Linux, Squid | 2026-06-17 | 6.8 MEDIUM | 8.1 HIGH |
| Multiple stack-based buffer overflows in Squid 3.x before 3.5.17 and 4.x before 4.0.9 allow remote HTTP servers to cause a denial of service or execute arbitrary code via crafted Edge Side Includes (ESI) responses. | |||||
| CVE-2016-4051 | 3 Canonical, Oracle, Squid-cache | 3 Ubuntu Linux, Linux, Squid | 2026-06-17 | 6.8 MEDIUM | 8.8 HIGH |
| Buffer overflow in cachemgr.cgi in Squid 2.x, 3.x before 3.5.17, and 4.x before 4.0.9 might allow remote attackers to cause a denial of service or execute arbitrary code by seeding manager reports with crafted data. | |||||
| CVE-2016-3948 | 1 Squid-cache | 1 Squid | 2026-06-17 | 5.0 MEDIUM | 7.5 HIGH |
| Squid 3.x before 3.5.16 and 4.x before 4.0.8 improperly perform bounds checking, which allows remote attackers to cause a denial of service via a crafted HTTP response, related to Vary headers. | |||||
| CVE-2016-3947 | 2 Canonical, Squid-cache | 2 Ubuntu Linux, Squid | 2026-06-17 | 7.5 HIGH | 8.2 HIGH |
| Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet. | |||||
| CVE-2016-2572 | 1 Squid-cache | 1 Squid | 2026-06-17 | 5.0 MEDIUM | 7.5 HIGH |
| http.cc in Squid 4.x before 4.0.7 relies on the HTTP status code after a response-parsing failure, which allows remote HTTP servers to cause a denial of service (assertion failure and daemon exit) via a malformed response. | |||||