CVE-2011-4096
squid: Invalid free by processing CNAME DNS record pointing to another CNAME record pointing to an empty A-record
Severity Score
7.5
*CVSS v3
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
The idnsGrokReply function in Squid before 3.1.16 does not properly free memory, which allows remote attackers to cause a denial of service (daemon abort) via a DNS reply containing a CNAME record that references another CNAME record that contains an empty A record.
La función idnsGrokReply en Squid anterior a v3.1.16 no adecuada de memoria libre, permite a atacantes remotos provocar una denegación de servicio (daemon abortar) a través de una respuesta DNS que contiene un registro CNAME que hace referencia a otro registro CNAME y este contiene un registro vacío.
Multiple vulnerabilities have been found in Squid, possibly resulting in remote Denial of Service. Versions less than 3.2.13 are affected.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2011-10-18 CVE Reserved
- 2011-11-17 CVE Published
- 2024-08-06 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-399: Resource Management Errors
CAPEC
References (13)
| URL | Tag | Source |
|---|---|---|
| http://bugs.squid-cache.org/show_bug.cgi?id=3237#c12 | X_refsource_misc | |
| http://secunia.com/advisories/47459 | Third Party Advisory | |
| http://www.openwall.com/lists/oss-security/2011/10/31/5 | Mailing List |
|
| http://www.openwall.com/lists/oss-security/2011/11/01/3 | Mailing List |
|
| http://www.securitytracker.com/id?1026265 | Vdb Entry | |
| http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID_3_1_16.html | X_refsource_confirm |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | <= 3.1.15 Search vendor "Squid-cache" for product "Squid" and version " <= 3.1.15" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | pre1 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | pre2 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | pre3 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | pre4 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | pre5 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | pre6 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | pre7 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable1 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable10 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable11 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable12 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable13 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable14 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable15 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable2 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable3 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable4 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable5 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable6 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable7 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable8 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | stable9 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | rc1, stable11 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0 Search vendor "Squid-cache" for product "Squid" and version "3.0" | rc4 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable1 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable1" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable2 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable2" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable3 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable3" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable4 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable4" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable5 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable5" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable6 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable6" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable7 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable7" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable8 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable8" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable9 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable9" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable10 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable10" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable11 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable11" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable11 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable11" | rc1 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable12 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable12" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable13 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable13" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable14 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable14" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable15 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable15" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable16 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable16" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable16 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable16" | rc1 |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable17 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable17" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable18 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable18" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable19 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable19" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable20 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable20" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable21 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable21" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable22 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable22" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable23 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable23" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable24 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable24" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.0.stable25 Search vendor "Squid-cache" for product "Squid" and version "3.0.stable25" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1 Search vendor "Squid-cache" for product "Squid" and version "3.1" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.1 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.1" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.2 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.2" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.3 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.3" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.4 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.4" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.5 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.5" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.6 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.6" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.7 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.7" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.8 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.8" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.9 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.9" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.10 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.10" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.11 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.11" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.12 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.12" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.13 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.13" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.14 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.14" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.15 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.15" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.16 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.16" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.17 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.17" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.0.18 Search vendor "Squid-cache" for product "Squid" and version "3.1.0.18" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.1 Search vendor "Squid-cache" for product "Squid" and version "3.1.1" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.2 Search vendor "Squid-cache" for product "Squid" and version "3.1.2" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.3 Search vendor "Squid-cache" for product "Squid" and version "3.1.3" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.4 Search vendor "Squid-cache" for product "Squid" and version "3.1.4" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.5 Search vendor "Squid-cache" for product "Squid" and version "3.1.5" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.5.1 Search vendor "Squid-cache" for product "Squid" and version "3.1.5.1" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.6 Search vendor "Squid-cache" for product "Squid" and version "3.1.6" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.7 Search vendor "Squid-cache" for product "Squid" and version "3.1.7" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.8 Search vendor "Squid-cache" for product "Squid" and version "3.1.8" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.9 Search vendor "Squid-cache" for product "Squid" and version "3.1.9" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.10 Search vendor "Squid-cache" for product "Squid" and version "3.1.10" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.11 Search vendor "Squid-cache" for product "Squid" and version "3.1.11" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.12 Search vendor "Squid-cache" for product "Squid" and version "3.1.12" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.13 Search vendor "Squid-cache" for product "Squid" and version "3.1.13" | - |
Affected
| ||||||
| Squid-cache Search vendor "Squid-cache" | Squid Search vendor "Squid-cache" for product "Squid" | 3.1.14 Search vendor "Squid-cache" for product "Squid" and version "3.1.14" | - |
Affected
| ||||||