CVE-2019-12523
published 2019-11-26CVE-2019-12523: An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through the access…
PriorityP357critical9.1CVSS 3.1
AVNACLPRNUINSUCHIHAN
EPSS
4.30%
89.9th percentile
An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through the access checks that incoming HTTP requests go through. This causes all access checks to be bypassed and allows access to restricted HTTP servers, e.g., an attacker can connect to HTTP servers that only listen on localhost.
Affected
16 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | squid | < squid 4.9-1 (bookworm) | squid 4.9-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| opensuse | leap | — | — |
| squid-cache | squid | 3.0 – 3.5.28 | — |
| squid-cache | squid | 4.0 – 4.8 | — |
| squid | squid | >= 0 < 4.9-1 | 4.9-1 |
| squid | squid | >= 0 < 4.9-1 | 4.9-1 |
| squid | squid | >= 0 < 4.9-1 | 4.9-1 |
| squid | squid | >= 0 < 4.9-1 | 4.9-1 |
CVSS provenance
nvdv3.19.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
nvdv2.06.4MEDIUMAV:N/AC:L/Au:N/C:P/I:P/A:N
osv9.1CRITICAL
vendor_debian9.1CRITICAL
vendor_redhat9.1CRITICAL
vendor_ubuntu9.1CRITICAL
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GHSA
GHSA-99vq-f459-jqrg: An issue was discovered in Squid before 4
ghsa_unreviewed·2022-05-24
CVE-2019-12523 [CRITICAL] GHSA-99vq-f459-jqrg: An issue was discovered in Squid before 4
An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through the access checks that incoming HTTP requests go through. This causes all access checks to be bypassed and allows access to restricted HTTP servers, e.g., an attacker can connect to HTTP servers that only listen on localhost.
OSV
squid3 regression
osv·2020-08-27·CVSS 7.5
CVE-2019-12520 [HIGH] squid3 regression
squid3 regression
USN-4446-1 fixed vulnerabilities in Squid. The update introduced a
regression when using Squid with the icap or ecap protocols. This update
fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Jeriko One discovered that Squid incorrectly handled caching certain
requests. A remote attacker could possibly use this issue to perform
cache-injection attacks or gain access to reverse proxy features such as
ESI. (CVE-2019-12520)
Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled certain URN requests. A remote attacker could possibly use this
issue to bypass access checks. (CVE-2019-12523)
Jeriko One discovered that Squid incorrectly handled URL decoding. A remote
attacker could possibly use this issue to bypass certa
OSV
squid3 vulnerabilities
osv·2020-08-03·CVSS 7.5
CVE-2019-12520 [HIGH] squid3 vulnerabilities
squid3 vulnerabilities
Jeriko One discovered that Squid incorrectly handled caching certain
requests. A remote attacker could possibly use this issue to perform
cache-injection attacks or gain access to reverse proxy features such as
ESI. (CVE-2019-12520)
Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled certain URN requests. A remote attacker could possibly use this
issue to bypass access checks. (CVE-2019-12523)
Jeriko One discovered that Squid incorrectly handled URL decoding. A remote
attacker could possibly use this issue to bypass certain rule checks.
(CVE-2019-12524)
Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled input validation. A remote attacker could use this issue to cause
Squid to crash, resulting in a denial of
OSV
squid, squid3 vulnerabilities
osv·2019-12-04·CVSS 9.1
CVE-2019-12523 [CRITICAL] squid, squid3 vulnerabilities
squid, squid3 vulnerabilities
Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled certain URN requests. A remote attacker could possibly use this
issue to bypass access checks and access restricted servers. This issue was
only addressed in Ubuntu 19.04 and Ubuntu 19.10. (CVE-2019-12523)
Jeriko One discovered that Squid incorrectly handed URN responses. A remote
attacker could use this issue to cause Squid to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2019-12526)
Alex Rousskov discovered that Squid incorrectly handled certain strings. A
remote attacker could possibly use this issue to cause Squid to crash,
resulting in a denial of service. This issue only affected Ubuntu 19.04.
(CVE-2019-12854)
Jeriko One and Kristoffer D
OSV
CVE-2019-12523: An issue was discovered in Squid before 4
osv·2019-11-26·CVSS 9.1
CVE-2019-12523 [CRITICAL] CVE-2019-12523: An issue was discovered in Squid before 4
An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through the access checks that incoming HTTP requests go through. This causes all access checks to be bypassed and allows access to restricted HTTP servers, e.g., an attacker can connect to HTTP servers that only listen on localhost.
Ubuntu
Squid regression
vendor_ubuntu·2020-08-27·CVSS 7.5
[HIGH] Squid regression
Title: Squid regression
Summary: USN-4446-1 introduced a regression in Squid.
USN-4446-1 fixed vulnerabilities in Squid. The update introduced a
regression when using Squid with the icap or ecap protocols. This update
fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Jeriko One discovered that Squid incorrectly handled caching certain
requests. A remote attacker could possibly use this issue to perform
cache-injection attacks or gain access to reverse proxy features such as
ESI. (CVE-2019-12520)
Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled certain URN requests. A remote attacker could possibly use this
issue to bypass access checks. (CVE-2019-12523)
Jeriko One discovered that Squid incorrectly handled URL decoding. A
Ubuntu
Squid vulnerabilities
vendor_ubuntu·2020-08-03·CVSS 7.5
CVE-2019-12520 [HIGH] Squid vulnerabilities
Title: Squid vulnerabilities
Summary: Several security issues were fixed in Squid.
Jeriko One discovered that Squid incorrectly handled caching certain
requests. A remote attacker could possibly use this issue to perform
cache-injection attacks or gain access to reverse proxy features such as
ESI. (CVE-2019-12520)
Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled certain URN requests. A remote attacker could possibly use this
issue to bypass access checks. (CVE-2019-12523)
Jeriko One discovered that Squid incorrectly handled URL decoding. A remote
attacker could possibly use this issue to bypass certain rule checks.
(CVE-2019-12524)
Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled input validation. A remote attacker could use
Ubuntu
Squid vulnerabilities
vendor_ubuntu·2019-12-04·CVSS 9.1
CVE-2019-12523 [CRITICAL] Squid vulnerabilities
Title: Squid vulnerabilities
Summary: Several security issues were fixed in Squid.
Jeriko One and Kristoffer Danielsson discovered that Squid incorrectly
handled certain URN requests. A remote attacker could possibly use this
issue to bypass access checks and access restricted servers. This issue was
only addressed in Ubuntu 19.04 and Ubuntu 19.10. (CVE-2019-12523)
Jeriko One discovered that Squid incorrectly handed URN responses. A remote
attacker could use this issue to cause Squid to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2019-12526)
Alex Rousskov discovered that Squid incorrectly handled certain strings. A
remote attacker could possibly use this issue to cause Squid to crash,
resulting in a denial of service. This issue only affected Ubunt
Red Hat
squid: Improper input validation in URI processor
vendor_redhat·2019-11-05·CVSS 9.1
CVE-2019-12523 [CRITICAL] CWE-20 squid: Improper input validation in URI processor
squid: Improper input validation in URI processor
An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through the access checks that incoming HTTP requests go through. This causes all access checks to be bypassed and allows access to restricted HTTP servers, e.g., an attacker can connect to HTTP servers that only listen on localhost.
Mitigation: Access to manager services can be prevented by enabling the Via header: (in /etc/squid/squid.conf)
~~~
via on
~~~
There are no reliable workarounds to prevent access to restricted upstream servers.
Package: squid (Red Hat Enterprise Linux 5) - Not affected
Package: squid (Red Hat Enterprise Linux 6) - Out of support scope
Package: squid34 (Red Hat Enterpri
Debian
CVE-2019-12523: squid - An issue was discovered in Squid before 4.9. When handling a URN request, a corr...
vendor_debian·2019·CVSS 9.1
CVE-2019-12523 [CRITICAL] CVE-2019-12523: squid - An issue was discovered in Squid before 4.9. When handling a URN request, a corr...
An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through the access checks that incoming HTTP requests go through. This causes all access checks to be bypassed and allows access to restricted HTTP servers, e.g., an attacker can connect to HTTP servers that only listen on localhost.
Scope: local
bookworm: resolved (fixed in 4.9-1)
bullseye: resolved (fixed in 4.9-1)
forky: resolved (fixed in 4.9-1)
sid: resolved (fixed in 4.9-1)
trixie: resolved (fixed in 4.9-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2019-12523 squid: Improper input validation in URI processor
bugzilla·2019-11-08·CVSS 9.1
CVE-2019-12523 [CRITICAL] CVE-2019-12523 squid: Improper input validation in URI processor
CVE-2019-12523 squid: Improper input validation in URI processor
Due to improper input validation Squid is vulnerable to security bypass attacks. Attacker can gain access to restricted HTTP servers.
References:
http://www.squid-cache.org/Advisories/SQUID-2019_8.txt
Discussion:
Created squid tracking bugs for this issue:
Affects: fedora-all [bug 1770372]
---
Upstream patch: http://www.squid-cache.org/Versions/v4/changesets/squid-4-fbbdf75efd7a5cc244b4886a9d42ea458c5a3a73.patch
---
External References:
http://www.squid-cache.org/Advisories/SQUID-2019_8.txt
---
Mitigation:
Access to manager services can be prevented by enabling the Via header: (in /etc/squid/squid.conf)
~~~
via on
~~~
There are no reliable workarounds to prevent access to restricted upstream servers.
---
This
Bugzilla
CVE-2019-12523 squid: Improper input validation in URI processor [fedora-all]
bugzilla·2019-11-08·CVSS 9.1
CVE-2019-12523 [CRITICAL] CVE-2019-12523 squid: Improper input validation in URI processor [fedora-all]
CVE-2019-12523 squid: Improper input validation in URI processor [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.htmlhttp://www.squid-cache.org/Advisories/SQUID-2019_8.txthttps://bugzilla.suse.com/show_bug.cgi?id=1156329https://lists.debian.org/debian-lts-announce/2020/07/msg00009.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/https://usn.ubuntu.com/4213-1/https://usn.ubuntu.com/4446-1/https://www.debian.org/security/2020/dsa-4682http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.htmlhttp://www.squid-cache.org/Advisories/SQUID-2019_8.txthttps://bugzilla.suse.com/show_bug.cgi?id=1156329https://lists.debian.org/debian-lts-announce/2020/07/msg00009.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/https://usn.ubuntu.com/4213-1/https://usn.ubuntu.com/4446-1/https://www.debian.org/security/2020/dsa-4682
2019-11-26
Published