Ubuntu.comUB:CVE-2019-12523CVE-2019-12523
9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:P/A:N
0.011 Low
EPSS
Percentile
83.9%
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | This was fixed in 4.x by rewriting the URI parser to use SBuf. fixed in Debian’s 3.5.23-5+deb9u2 |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 19.04 | noarch | squid | < 4.4-1ubuntu2.3 | UNKNOWN |
| ubuntu | 19.10 | noarch | squid | < 4.8-1ubuntu2.1 | UNKNOWN |
| ubuntu | 20.04 | noarch | squid | < 4.9-2ubuntu1 | UNKNOWN |
| ubuntu | 20.10 | noarch | squid | < 4.9-2ubuntu1 | UNKNOWN |
| ubuntu | 21.04 | noarch | squid | < 4.9-2ubuntu1 | UNKNOWN |
| ubuntu | 18.04 | noarch | squid3 | < 3.5.27-1ubuntu1.7 | UNKNOWN |
| ubuntu | 16.04 | noarch | squid3 | < 3.5.12-1ubuntu7.12 | UNKNOWN |
Related
9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:P/A:N
0.011 Low
EPSS
Percentile
83.9%