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squid-cache squid vulnerabilities and exploits
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7.5
CVSSv3
CVE-2021-28651
An issue exists in Squid prior to 4.15 and 5.x prior to 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount of memory. However, there is an unspecified attack methodology that can eas...
Squid-cache Squid
Debian Debian Linux 9.0
Debian Debian Linux 10.0
Fedoraproject Fedora 33
Fedoraproject Fedora 34
Netapp Cloud Manager -
6.5
CVSSv3
CVE-2021-31806
An issue exists in Squid prior to 4.15 and 5.x prior to 5.0.6. Due to a memory-management bug, it is vulnerable to a Denial of Service attack (against all clients using the proxy) via HTTP Range request processing.
Squid-cache Squid
Debian Debian Linux 9.0
Debian Debian Linux 10.0
Fedoraproject Fedora 33
Fedoraproject Fedora 34
Netapp Cloud Manager -
6.5
CVSSv3
CVE-2021-31808
An issue exists in Squid prior to 4.15 and 5.x prior to 5.0.6. Due to an input-validation bug, it is vulnerable to a Denial of Service attack (against all clients using the proxy). A client sends an HTTP Range request to trigger this.
Squid-cache Squid
Debian Debian Linux 9.0
Debian Debian Linux 10.0
Netapp Cloud Manager -
Fedoraproject Fedora 33
Fedoraproject Fedora 34
7.5
CVSSv3
CVE-2023-46848
Squid is vulnerable to Denial of Service, where a remote attacker can perform DoS by sending ftp:// URLs in HTTP Request messages or constructing ftp:// URLs from FTP Native input.
Squid-cache Squid
Redhat Enterprise Linux 9.0
Redhat Enterprise Linux Server Aus 9.2
Redhat Enterprise Linux Eus 9.2
Redhat Enterprise Linux Server Tus 9.2
7.5
CVSSv3
CVE-2018-1000024
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 v...
Squid-cache Squid
Debian Debian Linux 9.0
Debian Debian Linux 8.0
Debian Debian Linux 7.0
Canonical Ubuntu Linux 14.04
Canonical Ubuntu Linux 16.04
Canonical Ubuntu Linux 17.10
7.5
CVSSv3
CVE-2018-1000027
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 e...
Squid-cache Squid
Debian Debian Linux 7.0
Debian Debian Linux 8.0
Debian Debian Linux 9.0
Canonical Ubuntu Linux 14.04
Canonical Ubuntu Linux 16.04
Canonical Ubuntu Linux 17.10
5.3
CVSSv3
CVE-2019-18678
An issue exists in Squid 3.x and 4.x up to and including 4.8. It allows malicious users to smuggle HTTP requests through frontend software to a Squid instance that splits the HTTP Request pipeline differently. The resulting Response messages corrupt caches (between a client and S...
Squid-cache Squid
Canonical Ubuntu Linux 16.04
Canonical Ubuntu Linux 18.04
Canonical Ubuntu Linux 19.04
Canonical Ubuntu Linux 19.10
Debian Debian Linux 8.0
Fedoraproject Fedora 30
Fedoraproject Fedora 31
9.8
CVSSv3
CVE-2019-12519
An issue exists in Squid up to and including 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 eith...
Squid-cache Squid
Debian Debian Linux 9.0
Debian Debian Linux 10.0
Canonical Ubuntu Linux 16.04
Canonical Ubuntu Linux 18.04
Canonical Ubuntu Linux 19.10
Canonical Ubuntu Linux 20.04
Opensuse Leap 15.1
5.9
CVSSv3
CVE-2019-12521
An issue exists in Squid up to and including 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...
Squid-cache Squid
Canonical Ubuntu Linux 16.04
Canonical Ubuntu Linux 18.04
Canonical Ubuntu Linux 19.10
Canonical Ubuntu Linux 20.04
Debian Debian Linux 9.0
Debian Debian Linux 10.0
Opensuse Leap 15.1
6.1
CVSSv3
CVE-2019-18860
Squid prior to 4.9, when certain web browsers are used, mishandles HTML in the host (aka hostname) parameter to cachemgr.cgi.
Squid-cache Squid
Debian Debian Linux 9.0
Debian Debian Linux 10.0
Canonical Ubuntu Linux 18.04
Canonical Ubuntu Linux 19.10
Canonical Ubuntu Linux 20.04
Canonical Ubuntu Linux 16.04
Opensuse Leap 15.1
CVSSv3
CVSSv2
CVSSv3
VMScore
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