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218 vulnerabilities found for squid by squid-cache
CVE-2026-33526 (GCVE-0-2026-33526)
Vulnerability from nvd – Published: 2026-03-26 00:16 – Updated: 2026-06-30 12:07
VLAI
Title
Squid vulnerable to Denial of Service in ICP Request handling
Summary
Squid is a caching proxy for the Web. Prior to version 7.5, due to heap Use-After-Free, Squid is vulnerable to Denial of Service when handling ICP traffic. This problem allows a remote attacker to perform a reliable and repeatable Denial of Service attack against the Squid service using ICP protocol. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem _cannot_ be mitigated by denying ICP queries using `icp_access` rules. Version 7.5 contains a patch.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
18 references
Impacted products
19 products
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CVE-2026-33515 (GCVE-0-2026-33515)
Vulnerability from nvd – Published: 2026-03-26 00:13 – Updated: 2026-03-26 14:19
VLAI
Title
Squid has issues in ICP message handling
Summary
Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem cannot be mitigated by denying ICP queries using `icp_access` rules. Version 7.5 contains a patch.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/security/adv… | x_refsource_CONFIRM |
| https://github.com/squid-cache/squid/pull/2220 | x_refsource_MISC |
| https://github.com/squid-cache/squid/pull/2220#di… | x_refsource_MISC |
| https://github.com/squid-cache/squid/commit/8138e… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2026/03/25/4 |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 7.5
|
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CVE-2026-32748 (GCVE-0-2026-32748)
Vulnerability from nvd – Published: 2026-03-26 00:11 – Updated: 2026-06-30 12:07
VLAI
Title
Squid has Denial of Service in ICP Response handling
Summary
Squid is a caching proxy for the Web. Prior to version 7.5, due to premature release of resource during expected lifetime and heap Use-After-Free bugs, Squid is vulnerable to Denial of Service when handling ICP traffic. This problem allows a remote attacker to perform a reliable and repeatable Denial of Service attack against the Squid service using ICP protocol. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem _cannot_ be mitigated by denying ICP queries using `icp_access` rules. This bug is fixed in Squid version 7.5.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
18 references
Impacted products
19 products
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CVE-2025-62168 (GCVE-0-2025-62168)
Vulnerability from nvd – Published: 2025-10-17 16:21 – Updated: 2026-02-26 16:57
VLAI
Title
Squid vulnerable to information disclosure via authentication credential leakage in error handling
Summary
Squid is a caching proxy for the Web. In Squid versions prior to 7.2, a failure to redact HTTP authentication credentials in error handling allows information disclosure. The vulnerability allows a script to bypass browser security protections and learn the credentials a trusted client uses to authenticate. This potentially allows a remote client to identify security tokens or credentials used internally by a web application using Squid for backend load balancing. These attacks do not require Squid to be configured with HTTP authentication. The vulnerability is fixed in version 7.2. As a workaround, disable debug information in administrator mailto links generated by Squid by configuring squid.conf with email_err_data off.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/security/adv… | x_refsource_CONFIRM |
| https://github.com/squid-cache/squid/commit/0951a… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2025/11/05/6 |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 7.2
|
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CVE-2025-59362 (GCVE-0-2025-59362)
Vulnerability from nvd – Published: 2025-09-26 00:00 – Updated: 2025-09-29 15:30
VLAI
Summary
Squid through 7.1 mishandles ASN.1 encoding of long SNMP OIDs. This occurs in asn_build_objid in lib/snmplib/asn1.c.
Severity
4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
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CVE-2025-54574 (GCVE-0-2025-54574)
Vulnerability from nvd – Published: 2025-08-01 18:02 – Updated: 2025-11-05 17:04
VLAI
Title
Squid's URN Handling can lead to Buffer Overflow
Summary
Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow and possible remote code execution attack when processing URN due to incorrect buffer management. This has been fixed in version 6.4. To work around this issue, disable URN access permissions.
Severity
9.3 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/security/adv… | x_refsource_CONFIRM |
| https://github.com/squid-cache/squid/commit/a27bf… | x_refsource_MISC |
| https://github.com/squid-cache/squid/releases/tag… | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2025… | |
| http://www.openwall.com/lists/oss-security/2025/11/05/5 |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 6.4
|
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CVE-2024-45802 (GCVE-0-2024-45802)
Vulnerability from nvd – Published: 2024-10-28 14:36 – Updated: 2025-11-03 20:39
VLAI
Title
Squid Denial of Service
Summary
Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to Input Validation, Premature Release of Resource During Expected Lifetime, and Missing Release of Resource after Effective Lifetime bugs, Squid is vulnerable to Denial of Service attacks by a trusted server against all clients using the proxy. This bug is fixed in the default build configuration of Squid version 6.10.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-20 - Improper Input Validation
Assigner
References
3 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
>= 3.0, < 6.10
|
|
| squid-cache | squid |
Affected:
3.0 , < 6.10
(custom)
cpe:2.3:a:squid-cache:squid:3.0:*:*:*:*:*:*:* |
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CVE-2024-37894 (GCVE-0-2024-37894)
Vulnerability from nvd – Published: 2024-06-25 19:39 – Updated: 2025-11-03 20:38
VLAI
Title
Squid vulnerable to heap corruption in ESI assign
Summary
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Out-of-bounds Write error when assigning ESI variables, Squid is susceptible to a Memory Corruption error. This error can lead to a Denial of Service attack.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
4 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
>= 3.0, <= 3.5.28
Affected: >= 4.0, <= 4.16 Affected: >= 5.0, <= 5.9 Affected: >= 6.0, <= 6.9 |
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CVE-2024-25111 (GCVE-0-2024-25111)
Vulnerability from nvd – Published: 2024-03-06 18:14 – Updated: 2025-11-03 20:36
VLAI
Title
SQUID-2024:1 Denial of Service in HTTP Chunked Decoding
Summary
Squid is a web proxy cache. 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. This bug is fixed in Squid version 6.8. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. There is no workaround for this issue.
Severity
8.6 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
6 references
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
>= 3.5.27, < 6.8
|
|
| netapp | bluexp |
Affected:
0 , < *
(custom)
cpe:2.3:a:netapp:bluexp:-:*:*:*:*:*:*:* |
|
| squid-cache | squid |
Affected:
3.5.27 , < 6.8
(custom)
cpe:2.3:a:squid-cache:squid:3.5.27:*:*:*:*:*:*:* |
|
| fedoraproject | fedora |
Affected:
38
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* |
|
| fedoraproject | fedora |
Affected:
39
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* |
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CVE-2024-25617 (GCVE-0-2024-25617)
Vulnerability from nvd – Published: 2024-02-14 20:55 – Updated: 2025-02-13 17:40
VLAI
Title
Denial of Service in HTTP Header parser in squid proxy
Summary
Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. 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. In Squid version 6.5 and later, the default setting of these parameters is safe. Squid will emit a critical warning in cache.log if the administrator is setting these parameters to unsafe values. Squid will not at this time prevent these settings from being changed to unsafe values. Users are advised to upgrade to version 6.5. There are no known workarounds for this vulnerability. This issue is also tracked as SQUID-2024:2
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/security/adv… | x_refsource_CONFIRM |
| https://github.com/squid-cache/squid/commit/72a3b… | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2024032… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 6.5
|
|
| squid-cache | squid |
Affected:
0 , < 6.5
(custom)
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* |
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CVE-2024-23638 (GCVE-0-2024-23638)
Vulnerability from nvd – Published: 2024-01-23 23:23 – Updated: 2025-06-17 21:19
VLAI
Title
SQUID-2023:11 Denial of Service in Cache Manager
Summary
Squid is a caching proxy for the Web. 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. Squid older than 5.0.5 have not been tested and should be assumed to be vulnerable. All Squid-5.x up to and including 5.9 are vulnerable. All Squid-6.x up to and including 6.5 are vulnerable. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. As a workaround, prevent access to Cache Manager using Squid's main access control: `http_access deny manager`.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-825 - Expired Pointer Dereference
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/security/adv… | x_refsource_CONFIRM |
| https://github.com/squid-cache/squid/commit/290ae… | x_refsource_MISC |
| https://github.com/squid-cache/squid/commit/e8118… | x_refsource_MISC |
| https://megamansec.github.io/Squid-Security-Audit… | x_refsource_MISC |
| http://www.squid-cache.org/Versions/v5/SQUID-2023… | x_refsource_MISC |
| http://www.squid-cache.org/Versions/v6/SQUID-2023… | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2024020… | |
| https://lists.fedoraproject.org/archives/list/pac… | |
| https://lists.fedoraproject.org/archives/list/pac… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 6.6
|
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CVE-2023-50269 (GCVE-0-2023-50269)
Vulnerability from nvd – Published: 2023-12-14 17:09 – Updated: 2025-05-21 14:31
VLAI
Title
SQUID-2023:10 Denial of Service in HTTP Request parsing
Summary
Squid is a caching proxy for the Web. 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. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives.
Severity
8.6 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
7 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
>= 2.6, <= 2.7.STABLE9
Affected: >= 3.1, <= 5.9 Affected: >= 6.0.1, < 6.6 |
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CVE-2023-49288 (GCVE-0-2023-49288)
Vulnerability from nvd – Published: 2023-12-04 22:49 – Updated: 2025-02-13 17:18
VLAI
Title
Denial of Service in HTTP Collapsed Forwarding in Squid
Summary
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding. All versions of Squid from 3.5 up to and including 5.9 configured with "collapsed_forwarding on" are vulnerable. Configurations with "collapsed_forwarding off" or without a "collapsed_forwarding" directive are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should remove all collapsed_forwarding lines from their squid.conf.
Severity
8.6 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
>= 3.5, < 6.0.1
|
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CVE-2023-49286 (GCVE-0-2023-49286)
Vulnerability from nvd – Published: 2023-12-04 22:53 – Updated: 2025-02-13 17:18
VLAI
Title
Denial of Service in Helper Process management
Summary
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Incorrect Check of Function Return Value bug Squid is vulnerable to a Denial of Service attack against its Helper process management. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Severity
8.6 (High)
Assigner
References
7 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 6.5
|
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CVE-2023-49285 (GCVE-0-2023-49285)
Vulnerability from nvd – Published: 2023-12-04 22:56 – Updated: 2025-02-13 17:18
VLAI
Title
Denial of Service in HTTP Message Processing in Squid
Summary
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Buffer Overread bug Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Severity
8.6 (High)
CWE
- CWE-126 - Buffer Over-read
Assigner
References
9 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
>= 2.2, < 6.5
|
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CVE-2026-33526 (GCVE-0-2026-33526)
Vulnerability from cvelistv5 – Published: 2026-03-26 00:16 – Updated: 2026-06-30 12:07
VLAI
Title
Squid vulnerable to Denial of Service in ICP Request handling
Summary
Squid is a caching proxy for the Web. Prior to version 7.5, due to heap Use-After-Free, Squid is vulnerable to Denial of Service when handling ICP traffic. This problem allows a remote attacker to perform a reliable and repeatable Denial of Service attack against the Squid service using ICP protocol. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem _cannot_ be mitigated by denying ICP queries using `icp_access` rules. Version 7.5 contains a patch.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
18 references
Impacted products
19 products
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CVE-2026-33515 (GCVE-0-2026-33515)
Vulnerability from cvelistv5 – Published: 2026-03-26 00:13 – Updated: 2026-03-26 14:19
VLAI
Title
Squid has issues in ICP message handling
Summary
Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem cannot be mitigated by denying ICP queries using `icp_access` rules. Version 7.5 contains a patch.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/security/adv… | x_refsource_CONFIRM |
| https://github.com/squid-cache/squid/pull/2220 | x_refsource_MISC |
| https://github.com/squid-cache/squid/pull/2220#di… | x_refsource_MISC |
| https://github.com/squid-cache/squid/commit/8138e… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2026/03/25/4 |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 7.5
|
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CVE-2026-32748 (GCVE-0-2026-32748)
Vulnerability from cvelistv5 – Published: 2026-03-26 00:11 – Updated: 2026-06-30 12:07
VLAI
Title
Squid has Denial of Service in ICP Response handling
Summary
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Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
18 references
Impacted products
19 products
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CVE-2025-62168 (GCVE-0-2025-62168)
Vulnerability from cvelistv5 – Published: 2025-10-17 16:21 – Updated: 2026-02-26 16:57
VLAI
Title
Squid vulnerable to information disclosure via authentication credential leakage in error handling
Summary
Squid is a caching proxy for the Web. In Squid versions prior to 7.2, a failure to redact HTTP authentication credentials in error handling allows information disclosure. The vulnerability allows a script to bypass browser security protections and learn the credentials a trusted client uses to authenticate. This potentially allows a remote client to identify security tokens or credentials used internally by a web application using Squid for backend load balancing. These attacks do not require Squid to be configured with HTTP authentication. The vulnerability is fixed in version 7.2. As a workaround, disable debug information in administrator mailto links generated by Squid by configuring squid.conf with email_err_data off.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/security/adv… | x_refsource_CONFIRM |
| https://github.com/squid-cache/squid/commit/0951a… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2025/11/05/6 |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 7.2
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CVE-2025-59362 (GCVE-0-2025-59362)
Vulnerability from cvelistv5 – Published: 2025-09-26 00:00 – Updated: 2025-09-29 15:30
VLAI
Summary
Squid through 7.1 mishandles ASN.1 encoding of long SNMP OIDs. This occurs in asn_build_objid in lib/snmplib/asn1.c.
Severity
4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
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CVE-2025-54574 (GCVE-0-2025-54574)
Vulnerability from cvelistv5 – Published: 2025-08-01 18:02 – Updated: 2025-11-05 17:04
VLAI
Title
Squid's URN Handling can lead to Buffer Overflow
Summary
Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow and possible remote code execution attack when processing URN due to incorrect buffer management. This has been fixed in version 6.4. To work around this issue, disable URN access permissions.
Severity
9.3 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/security/adv… | x_refsource_CONFIRM |
| https://github.com/squid-cache/squid/commit/a27bf… | x_refsource_MISC |
| https://github.com/squid-cache/squid/releases/tag… | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2025… | |
| http://www.openwall.com/lists/oss-security/2025/11/05/5 |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 6.4
|
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CVE-2024-45802 (GCVE-0-2024-45802)
Vulnerability from cvelistv5 – Published: 2024-10-28 14:36 – Updated: 2025-11-03 20:39
VLAI
Title
Squid Denial of Service
Summary
Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to Input Validation, Premature Release of Resource During Expected Lifetime, and Missing Release of Resource after Effective Lifetime bugs, Squid is vulnerable to Denial of Service attacks by a trusted server against all clients using the proxy. This bug is fixed in the default build configuration of Squid version 6.10.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-20 - Improper Input Validation
Assigner
References
3 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
>= 3.0, < 6.10
|
|
| squid-cache | squid |
Affected:
3.0 , < 6.10
(custom)
cpe:2.3:a:squid-cache:squid:3.0:*:*:*:*:*:*:* |
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CVE-2024-37894 (GCVE-0-2024-37894)
Vulnerability from cvelistv5 – Published: 2024-06-25 19:39 – Updated: 2025-11-03 20:38
VLAI
Title
Squid vulnerable to heap corruption in ESI assign
Summary
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Out-of-bounds Write error when assigning ESI variables, Squid is susceptible to a Memory Corruption error. This error can lead to a Denial of Service attack.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
4 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
>= 3.0, <= 3.5.28
Affected: >= 4.0, <= 4.16 Affected: >= 5.0, <= 5.9 Affected: >= 6.0, <= 6.9 |
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CVE-2024-25111 (GCVE-0-2024-25111)
Vulnerability from cvelistv5 – Published: 2024-03-06 18:14 – Updated: 2025-11-03 20:36
VLAI
Title
SQUID-2024:1 Denial of Service in HTTP Chunked Decoding
Summary
Squid is a web proxy cache. 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. This bug is fixed in Squid version 6.8. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. There is no workaround for this issue.
Severity
8.6 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
6 references
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
>= 3.5.27, < 6.8
|
|
| netapp | bluexp |
Affected:
0 , < *
(custom)
cpe:2.3:a:netapp:bluexp:-:*:*:*:*:*:*:* |
|
| squid-cache | squid |
Affected:
3.5.27 , < 6.8
(custom)
cpe:2.3:a:squid-cache:squid:3.5.27:*:*:*:*:*:*:* |
|
| fedoraproject | fedora |
Affected:
38
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* |
|
| fedoraproject | fedora |
Affected:
39
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* |
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CVE-2024-25617 (GCVE-0-2024-25617)
Vulnerability from cvelistv5 – Published: 2024-02-14 20:55 – Updated: 2025-02-13 17:40
VLAI
Title
Denial of Service in HTTP Header parser in squid proxy
Summary
Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. 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. In Squid version 6.5 and later, the default setting of these parameters is safe. Squid will emit a critical warning in cache.log if the administrator is setting these parameters to unsafe values. Squid will not at this time prevent these settings from being changed to unsafe values. Users are advised to upgrade to version 6.5. There are no known workarounds for this vulnerability. This issue is also tracked as SQUID-2024:2
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/security/adv… | x_refsource_CONFIRM |
| https://github.com/squid-cache/squid/commit/72a3b… | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2024032… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 6.5
|
|
| squid-cache | squid |
Affected:
0 , < 6.5
(custom)
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* |
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CVE-2024-23638 (GCVE-0-2024-23638)
Vulnerability from cvelistv5 – Published: 2024-01-23 23:23 – Updated: 2025-06-17 21:19
VLAI
Title
SQUID-2023:11 Denial of Service in Cache Manager
Summary
Squid is a caching proxy for the Web. 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. Squid older than 5.0.5 have not been tested and should be assumed to be vulnerable. All Squid-5.x up to and including 5.9 are vulnerable. All Squid-6.x up to and including 6.5 are vulnerable. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. As a workaround, prevent access to Cache Manager using Squid's main access control: `http_access deny manager`.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-825 - Expired Pointer Dereference
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/squid-cache/squid/security/adv… | x_refsource_CONFIRM |
| https://github.com/squid-cache/squid/commit/290ae… | x_refsource_MISC |
| https://github.com/squid-cache/squid/commit/e8118… | x_refsource_MISC |
| https://megamansec.github.io/Squid-Security-Audit… | x_refsource_MISC |
| http://www.squid-cache.org/Versions/v5/SQUID-2023… | x_refsource_MISC |
| http://www.squid-cache.org/Versions/v6/SQUID-2023… | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2024020… | |
| https://lists.fedoraproject.org/archives/list/pac… | |
| https://lists.fedoraproject.org/archives/list/pac… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 6.6
|
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CVE-2023-50269 (GCVE-0-2023-50269)
Vulnerability from cvelistv5 – Published: 2023-12-14 17:09 – Updated: 2025-05-21 14:31
VLAI
Title
SQUID-2023:10 Denial of Service in HTTP Request parsing
Summary
Squid is a caching proxy for the Web. 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. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives.
Severity
8.6 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
7 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
>= 2.6, <= 2.7.STABLE9
Affected: >= 3.1, <= 5.9 Affected: >= 6.0.1, < 6.6 |
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CVE-2023-49285 (GCVE-0-2023-49285)
Vulnerability from cvelistv5 – Published: 2023-12-04 22:56 – Updated: 2025-02-13 17:18
VLAI
Title
Denial of Service in HTTP Message Processing in Squid
Summary
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Buffer Overread bug Squid is vulnerable to a Denial of Service attack against Squid HTTP Message processing. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Severity
8.6 (High)
CWE
- CWE-126 - Buffer Over-read
Assigner
References
9 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
>= 2.2, < 6.5
|
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CVE-2023-49286 (GCVE-0-2023-49286)
Vulnerability from cvelistv5 – Published: 2023-12-04 22:53 – Updated: 2025-02-13 17:18
VLAI
Title
Denial of Service in Helper Process management
Summary
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Incorrect Check of Function Return Value bug Squid is vulnerable to a Denial of Service attack against its Helper process management. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Severity
8.6 (High)
Assigner
References
7 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
< 6.5
|
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CVE-2023-49288 (GCVE-0-2023-49288)
Vulnerability from cvelistv5 – Published: 2023-12-04 22:49 – Updated: 2025-02-13 17:18
VLAI
Title
Denial of Service in HTTP Collapsed Forwarding in Squid
Summary
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding. All versions of Squid from 3.5 up to and including 5.9 configured with "collapsed_forwarding on" are vulnerable. Configurations with "collapsed_forwarding off" or without a "collapsed_forwarding" directive are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should remove all collapsed_forwarding lines from their squid.conf.
Severity
8.6 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid |
Affected:
>= 3.5, < 6.0.1
|
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