Ubuntu update for Squid



Risk Low
Patch available YES
Number of vulnerabilities 6
CVE-ID CVE-2016-2569
CVE-2016-2570
CVE-2016-2571
CVE-2016-3948
CVE-2018-1000024
CVE-2018-1000027
CWE-ID CWE-20
CWE-119
CWE-476
CWE-284
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Denial of service

EUVDB-ID: #VU4170

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-2569

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to improper appending of data to String objects. A remote attacker can use a long string, as demonstrated by a crafted HTTP Vary header, trigger assertion failure and daemon exit and cause the service to crash.

Mitigation

Update the affected packages

Ubuntu 17.10:
squid3 3.5.23-5ubuntu1.1
Ubuntu 16.04 LTS:
squid3 3.5.12-1ubuntu7.5
Ubuntu 14.04 LTS:
squid3 3.3.8-1ubuntu6.11

Vulnerable software versions

Ubuntu: 14.04 - 17.10

CPE2.3 External links

https://www.ubuntu.com/usn/usn-3557-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Memory corruption

EUVDB-ID: #VU4171

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-2570

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the Edge Side Includes (ESI) parser due to improper checking of buffer limits during XML parsing. A remote attacker can use a specially crafted XML document, related to esi/CustomParser.cc and esi/CustomParser.h, as demonstrated by a crafted HTTP Vary header, trigger assertion failure and daemon exit and cause the service to crash.

Mitigation

Update the affected packages

Ubuntu 17.10:
squid3 3.5.23-5ubuntu1.1
Ubuntu 16.04 LTS:
squid3 3.5.12-1ubuntu7.5
Ubuntu 14.04 LTS:
squid3 3.3.8-1ubuntu6.11

Vulnerable software versions

Ubuntu: 14.04 - 17.10

CPE2.3 External links

https://www.ubuntu.com/usn/usn-3557-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Denial of service

EUVDB-ID: #VU4172

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-2571

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in http.cc due to proceeding with the storage of certain data after a response-parsing failure. A remote attacker can use a specially crafted response, trigger assertion failure and daemon exit and cause the service to crash.

Mitigation

Update the affected packages

Ubuntu 17.10:
squid3 3.5.23-5ubuntu1.1
Ubuntu 16.04 LTS:
squid3 3.5.12-1ubuntu7.5
Ubuntu 14.04 LTS:
squid3 3.3.8-1ubuntu6.11

Vulnerable software versions

Ubuntu: 14.04 - 17.10

CPE2.3 External links

https://www.ubuntu.com/usn/usn-3557-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Memory corruption

EUVDB-ID: #VU4175

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-3948

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to improper bounds checking. A remote attacker can use a specially crafted HTTP response, related to Vary headers, trigger memory corruption and cause the service to crash.

Mitigation

Update the affected packages

Ubuntu 17.10:
squid3 3.5.23-5ubuntu1.1
Ubuntu 16.04 LTS:
squid3 3.5.12-1ubuntu7.5
Ubuntu 14.04 LTS:
squid3 3.3.8-1ubuntu6.11

Vulnerable software versions

Ubuntu: 14.04 - 17.10

CPE2.3 External links

https://www.ubuntu.com/usn/usn-3557-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) NULL pointer derefenrece

EUVDB-ID: #VU10383

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-1000024

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect pointer handling when processing ESI responses. A remote attacker can supply a specially crafted response to the vulnerable server and trigger application crash.

Mitigation

Update the affected packages

Ubuntu 17.10:
squid3 3.5.23-5ubuntu1.1
Ubuntu 16.04 LTS:
squid3 3.5.12-1ubuntu7.5
Ubuntu 14.04 LTS:
squid3 3.3.8-1ubuntu6.11

Vulnerable software versions

Ubuntu: 14.04 - 17.10

CPE2.3 External links

https://www.ubuntu.com/usn/usn-3557-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Denial of service

EUVDB-ID: #VU10384

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-1000027

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to unspecified error. A remote attacker can cause denial of service issue in HTTP Message processing.

Mitigation

Update the affected packages

Ubuntu 17.10:
squid3 3.5.23-5ubuntu1.1
Ubuntu 16.04 LTS:
squid3 3.5.12-1ubuntu7.5
Ubuntu 14.04 LTS:
squid3 3.3.8-1ubuntu6.11

Vulnerable software versions

Ubuntu: 14.04 - 17.10

CPE2.3 External links

https://www.ubuntu.com/usn/usn-3557-1/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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