CVE-2019-12522

CVE-2019-12522 (Squid) affects Squid up to version 4.7. When Squid runs as root, its child processes are spawned as a lesser user (default: nobody). The code path uses leave_suid, which leaves the Saved UID as 0, enabling an attacker who compromises a child process to escalate privileges back to ...

CVE-2019-12522

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 leavesuid call. leavesuid leaves the Saved UID as 0. This makes it trivial for an attacker who has compromised the child proces...

CVE-2019-12521

CVE-2019-12521 is a Squid vulnerability where, while parsing ESI, the ESIContext buffer used to hold ESIElements is overflowed due to an off-by-one bug in addStackElement. The overflow is within the same structure and causes a crash during processing (not adjacent memory corruption). Affected: Sq...

CVE-2019-12521

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 elemen...

CVE-2019-12521

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 elemen...

CVE-2019-12521

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 elemen...

CVE-2019-12524

An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is...

CVE-2019-12524

An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is...

CVE-2019-12524

CVE-2019-12524 concerns Squid up to version 4.7 where the Cache Manager block relies on a url_regex rule that decodes incoming requests. An attacker can craft an encoded URL to bypass the url_regex check and access the blocked Cache Manager resource. Affects Squid’s request handling path and deco...

Squid <= 4.14 Privilege Escalation Vulnerability

Squid is prone to a privilege escalation vulnerability. Copyright C 2020 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you c...

The vulnerability of the Squid proxy server arises from insufficient validation of input data, allowing attackers to gain access to limited HTTP servers.

The vulnerability of the Squid proxy server exists due to insufficient validation of input data. Exploiting this vulnerability allows a malicious actor, operating remotely, to gain access to limited HTTP servers through specially crafted HTTP requests...

Friday Squid Blogging: Amazingly Realistic Squid Drawings

The squid drawings of Yuuki Tokuda are simply incredible. I tried to figure out how to buy one of them, but everything is in Japanese. As usual, you can also use this squid post to talk about the security stories in the news that I haven't covered. Read my blog posting guidelines here...

Denial Of Service (DoS)

squid is vulnerable to denial of service. An input validation flaw was found in the way Squid calculated the total number of resource records in the answer section of multiple name server responses. An attacker could use this flaw to cause Squid to crash...

Denial Of Service (DoS)

Squid is vulnerable to denial of service DoS. A buffer overflow flaw was found in the way Squid parsed replies from remote Gopher servers. A remote user allowed to send Gopher requests to a Squid proxy could possibly use this flaw to cause the squid child process to crash or execute arbitrary cod...

Denial Of Service (DoS)

squid is vulnerable to denial of service DoS. The vulnerability exists as it was found that string comparison functions in Squid did not properly handle the comparisons of NULL and empty strings. A remote, trusted web client could use this flaw to cause the squid daemon to crash via a...

Denial Of Service (DoS)

Squid is vulnerable to Denial Of Service DoS. A flaw was found in the way Squid handled truncated DNS replies. A remote attacker able to send specially-crafted UDP packets to Squid's DNS client port could trigger an assertion failure in Squid's child process, causing that child process to exit...

Denial Of Service (DoS)

Squid is vulnerable to Denial Of Service DoS. A flaw was found in the way Squid processed certain external ACL helper HTTP header fields that contained a delimiter that was not a comma. A remote attacker could issue a crafted request to the Squid server, causing excessive CPU use up to 100%...

Denial Of Service (DoS)

squid is vulnerable to denial of service. A flaw was found in the way squid manipulated HTTP headers for cached objects stored in system memory. An attacker could use this flaw to cause a squid child process to exit. This interrupted existing connections and made proxy services unavailable. Note:...

Denial Of Service (DoS)

squid is vulnerable to denial of service. A flaw was found in the way squid stored HTTP headers for cached objects in system memory. An attacker could cause squid to use additional memory, and trigger high CPU usage when processing requests for certain cached objects, possibly leading to a denial...

Denial Of Service (DoS)

Squid is vulnerable to denial of service DoS. Due to the way Squid processed the TRACE request method, it was possible for an attacker behind the Squid proxy to issue a malformed TRACE request, crashing the Squid daemon child process. As long as these requests were sent, it would prevent legitima...