Vulnerabilites related to squid-cache - squid
CVE-2024-37894 (GCVE-0-2024-37894)
Vulnerability from cvelistv5
Published
2024-06-25 19:39
Modified
2025-11-03 20:38
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-787 - Out-of-bounds Write
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: >= 3.0, <= 3.5.28 Version: >= 4.0, <= 4.16 Version: >= 5.0, <= 5.9 Version: >= 6.0, <= 6.9 |
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CVE-2025-54574 (GCVE-0-2025-54574)
Vulnerability from cvelistv5
Published
2025-08-01 18:02
Modified
2025-11-05 17:04
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-122 - Heap-based 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.
References
| ► | URL | Tags | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: < 6.4 |
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CVE-2024-23638 (GCVE-0-2024-23638)
Vulnerability from cvelistv5
Published
2024-01-23 23:23
Modified
2025-06-17 21:19
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-825 - Expired Pointer Dereference
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`.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: < 6.6 |
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CVE-2024-45802 (GCVE-0-2024-45802)
Vulnerability from cvelistv5
Published
2024-10-28 14:36
Modified
2025-11-03 20:39
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-20 - Improper Input Validation
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.
References
| ► | URL | Tags | |||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: >= 3.0, < 6.10 |
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CVE-2023-46724 (GCVE-0-2023-46724)
Vulnerability from cvelistv5
Published
2023-11-01 19:09
Modified
2025-02-13 17:14
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
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.
References
| ► | URL | Tags | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: >= 3.3.0.1, < 6.4 |
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CVE-2023-49286 (GCVE-0-2023-49286)
Vulnerability from cvelistv5
Published
2023-12-04 22:53
Modified
2025-02-13 17:18
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
| ► | URL | Tags | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: < 6.5 |
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CVE-2024-25617 (GCVE-0-2024-25617)
Vulnerability from cvelistv5
Published
2024-02-14 20:55
Modified
2025-02-13 17:40
Severity ?
VLAI Severity ?
EPSS score ?
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
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: < 6.5 |
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CVE-2024-25111 (GCVE-0-2024-25111)
Vulnerability from cvelistv5
Published
2024-03-06 18:14
Modified
2025-11-03 20:36
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-674 - Uncontrolled Recursion
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.
References
| ► | URL | Tags | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: >= 3.5.27, < 6.8 |
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CVE-2023-46728 (GCVE-0-2023-46728)
Vulnerability from cvelistv5
Published
2023-11-06 17:13
Modified
2025-11-03 18:08
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-476 - NULL Pointer Dereference
Summary
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests.
References
| ► | URL | Tags | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: < 6.0.1 |
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CVE-2025-62168 (GCVE-0-2025-62168)
Vulnerability from cvelistv5
Published
2025-10-17 16:21
Modified
2025-11-05 17:04
Severity ?
VLAI Severity ?
EPSS score ?
CWE
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.
References
| ► | URL | Tags |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: < 7.2 |
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CVE-2023-49285 (GCVE-0-2023-49285)
Vulnerability from cvelistv5
Published
2023-12-04 22:56
Modified
2025-02-13 17:18
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-126 - Buffer Over-read
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.
References
| ► | URL | Tags | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: >= 2.2, < 6.5 |
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"x_transferred"
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"x_transferred"
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{
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"x_transferred"
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},
{
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"x_transferred"
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"tags": [
"x_refsource_MISC"
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{
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"tags": [
"x_refsource_MISC"
],
"url": "http://www.squid-cache.org/Versions/v6/SQUID-2023_7.patch"
},
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},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html"
},
{
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}
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CVE-2023-49288 (GCVE-0-2023-49288)
Vulnerability from cvelistv5
Published
2023-12-04 22:49
Modified
2025-02-13 17:18
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-416 - Use After Free
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.
References
| ► | URL | Tags | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: >= 3.5, < 6.0.1 |
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},
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{
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"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
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},
{
"tags": [
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/"
},
{
"tags": [
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/"
},
{
"tags": [
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20240119-0006/"
}
],
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}
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},
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},
{
"url": "https://security.netapp.com/advisory/ntap-20240119-0006/"
}
],
"source": {
"advisory": "GHSA-rj5h-46j6-q2g5",
"discovery": "UNKNOWN"
},
"title": "Denial of Service in HTTP Collapsed Forwarding in Squid"
}
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CVE-2023-50269 (GCVE-0-2023-50269)
Vulnerability from cvelistv5
Published
2023-12-14 17:09
Modified
2025-05-21 14:31
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-674 - Uncontrolled Recursion
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.
References
| ► | URL | Tags | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| squid-cache | squid |
Version: >= 2.6, <= 2.7.STABLE9 Version: >= 3.1, <= 5.9 Version: >= 6.0.1, < 6.6 |
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"x_refsource_CONFIRM",
"x_transferred"
],
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},
{
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"x_transferred"
],
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"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch"
},
{
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"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/"
},
{
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"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/"
},
{
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"x_transferred"
],
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},
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],
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}
],
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{
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html"
},
{
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}
],
"source": {
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"discovery": "UNKNOWN"
},
"title": "SQUID-2023:10 Denial of Service in HTTP Request parsing"
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