Multiple vulnerabilities in Squid Proxy Cache



Published: 2020-02-07
Risk High
Patch available YES
Number of vulnerabilities 4
CVE ID CVE-2020-8450
CVE-2020-8449
CVE-2019-12528
CVE-2020-8517
CWE ID CWE-119
CWE-20
CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Squid
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor Squid-cache.org

Security Advisory

1) Buffer overflow

Risk: High

CVSSv3: 7.1 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-8450

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing HTTP requests, when Squid is acting as a reverse proxy. A remote attacker can send a specially crafted HTTP request to the affected proxy server, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Squid: 2.0.patch1, 2.0.patch2, 2.0.pre1, 2.0.release, 2.0_patch2, 2.1.patch1, 2.1.patch2, 2.1.pre1, 2.1.pre3, 2.1.pre4, 2.1.release, 2.1_patch2, 2.2.devel3, 2.2.devel4, 2.2.pre1, 2.2.pre2, 2.2.stable1, 2.2.stable2, 2.2.stable3, 2.2.stable4, 2.2.stable5, 2.3.devel2, 2.3.devel3, 2.3.stable1, 2.3.stable2, 2.3.stable3, 2.3.stable4, 2.3.stable5, 2.3_.stable4, 2.3_.stable5, 2.3_stable5, 2.4, 2.4.stable1, 2.4.stable2, 2.4.stable3, 2.4.stable4, 2.4.stable6, 2.4.stable7, 2.4_.stable2, 2.4_.stable6, 2.4_.stable7, 2.4_9, 2.4_stable7, 2.4_stable_2, 2.4_stable_3, 2.5.6, 2.5.9, 2.5.stable1, 2.5.stable2, 2.5.stable3, 2.5.stable4, 2.5.stable5, 2.5.stable6, 2.5.stable7, 2.5.stable8, 2.5.stable9, 2.5.stable10, 2.5.stable11, 2.5_.stable1, 2.5_.stable3, 2.5_.stable4, 2.5_.stable5, 2.5_.stable6, 2.5_stable3, 2.5_stable4, 2.5_stable9, 2.6.stable1, 2.6.stable2, 2.6.stable3, 2.6.stable4, 2.6.stable5, 2.6.stable6, 2.7.RC2, 2.7.stable1, 2.7.stable2, 2.7.stable3, 2.7.stable4, 2.7.stable5, 2.7.STABLE6, 2.7.STABLE7, 2.7.STABLE8, 2.7.STABLE9, 3.0, 3.0.stable1, 3.0.stable2, 3.0.stable3, 3.0.stable4, 3.0.stable5, 3.0.stable6, 3.0.stable7, 3.0.stable8, 3.0.stable9, 3.0.stable10, 3.0.stable11, 3.0.stable12, 3.1, 3.1.0.1, 3.1.0.2, 3.1.0.3, 3.1.0.4, 3.2.0.1, 3.2.0.2, 3.2.0.3, 3.2.0.4, 3.2.0.5, 3.2.0.6, 3.2.0.7, 3.2.0.8, 3.2.0.9, 3.2.0.10, 3.2.0.11, 3.2.0.12, 3.2.0.13, 3.2.0.14, 3.2.0.15, 3.2.0.16, 3.2.0.17, 3.2.0.18, 3.2.0.19, 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 3.2.10, 3.2.11, 3.2.12, 3.2.13, 3.3.0, 3.3.0.1, 3.3.0.2, 3.3.0.3, 3.3.1, 3.3.2, 3.3.3, 3.3.4, 3.3.5, 3.3.6, 3.3.7, 3.3.8, 3.3.9, 3.3.10, 3.3.11, 3.3.12, 3.3.13, 3.4.0.1, 3.4.0.2, 3.4.0.3, 3.4.1, 3.4.2, 3.4.3, 3.4.4, 3.4.5, 3.4.6, 3.4.7, 3.4.8, 3.4.9, 3.4.10, 3.4.11, 3.4.12, 3.5.0.1, 3.5.0.2, 3.5.0.3, 3.5.0.4, 3.5.1, 3.5.2, 3.5.3, 3.5.4, 3.5.5, 3.5.6, 3.5.7, 3.5.8, 3.5.9, 3.5.10, 3.5.11, 3.5.12, 3.5.13, 3.5.14, 3.5.15, 3.5.16, 3.5.17, 3.5.18, 3.5.19, 3.5.20, 3.5.21, 3.5.22, 3.5.23, 3.5.24, 3.5.25, 3.5.26, 3.5.27, 3.5.28, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6, 4.0.7, 4.0.8, 4.0.9, 4.0.10, 4.0.11, 4.0.12, 4.0.13, 4.0.14, 4.0.15, 4.0.16, 4.0.17, 4.0.18, 4.0.19, 4.0.20, 4.0.21, 4.0.22, 4.0.23, 4.0.24, 4.0.25, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9

CPE External links

http://www.squid-cache.org/Advisories/SQUID-2020_1.txt
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2020_1.patch
http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-8e657e835965c3a011375feaa0359921c5b3e2dd.patch
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_1.patch
http://www.squid-cache.org/Versions/v4/changesets/squid-4-b3a0719affab099c684f1cd62b79ab02816fa962.patch
http://www.squid-cache.org/Versions/v4/changesets/squid-4-d8e4715992d0e530871519549add5519cbac0598.patch

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

2) Input validation error

Risk: Medium

CVSSv3: 4.6 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-8449

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied input when processing HTTP requests. A remote attacker can send a specially crafted HTTP request, bypass configured security filters and gain access to certain server resources.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Squid: 2.0.patch1, 2.0.patch2, 2.0.pre1, 2.0.release, 2.0_patch2, 2.1.patch1, 2.1.patch2, 2.1.pre1, 2.1.pre3, 2.1.pre4, 2.1.release, 2.1_patch2, 2.2.devel3, 2.2.devel4, 2.2.pre1, 2.2.pre2, 2.2.stable1, 2.2.stable2, 2.2.stable3, 2.2.stable4, 2.2.stable5, 2.3.devel2, 2.3.devel3, 2.3.stable1, 2.3.stable2, 2.3.stable3, 2.3.stable4, 2.3.stable5, 2.3_.stable4, 2.3_.stable5, 2.3_stable5, 2.4, 2.4.stable1, 2.4.stable2, 2.4.stable3, 2.4.stable4, 2.4.stable6, 2.4.stable7, 2.4_.stable2, 2.4_.stable6, 2.4_.stable7, 2.4_9, 2.4_stable7, 2.4_stable_2, 2.4_stable_3, 2.5.6, 2.5.9, 2.5.stable1, 2.5.stable2, 2.5.stable3, 2.5.stable4, 2.5.stable5, 2.5.stable6, 2.5.stable7, 2.5.stable8, 2.5.stable9, 2.5.stable10, 2.5.stable11, 2.5_.stable1, 2.5_.stable3, 2.5_.stable4, 2.5_.stable5, 2.5_.stable6, 2.5_stable3, 2.5_stable4, 2.5_stable9, 2.6.stable1, 2.6.stable2, 2.6.stable3, 2.6.stable4, 2.6.stable5, 2.6.stable6, 2.7.RC2, 2.7.stable1, 2.7.stable2, 2.7.stable3, 2.7.stable4, 2.7.stable5, 2.7.STABLE6, 2.7.STABLE7, 2.7.STABLE8, 2.7.STABLE9, 3.0, 3.0.stable1, 3.0.stable2, 3.0.stable3, 3.0.stable4, 3.0.stable5, 3.0.stable6, 3.0.stable7, 3.0.stable8, 3.0.stable9, 3.0.stable10, 3.0.stable11, 3.0.stable12, 3.1, 3.1.0.1, 3.1.0.2, 3.1.0.3, 3.1.0.4, 3.2.0.1, 3.2.0.2, 3.2.0.3, 3.2.0.4, 3.2.0.5, 3.2.0.6, 3.2.0.7, 3.2.0.8, 3.2.0.9, 3.2.0.10, 3.2.0.11, 3.2.0.12, 3.2.0.13, 3.2.0.14, 3.2.0.15, 3.2.0.16, 3.2.0.17, 3.2.0.18, 3.2.0.19, 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 3.2.10, 3.2.11, 3.2.12, 3.2.13, 3.3.0, 3.3.0.1, 3.3.0.2, 3.3.0.3, 3.3.1, 3.3.2, 3.3.3, 3.3.4, 3.3.5, 3.3.6, 3.3.7, 3.3.8, 3.3.9, 3.3.10, 3.3.11, 3.3.12, 3.3.13, 3.4.0.1, 3.4.0.2, 3.4.0.3, 3.4.1, 3.4.2, 3.4.3, 3.4.4, 3.4.5, 3.4.6, 3.4.7, 3.4.8, 3.4.9, 3.4.10, 3.4.11, 3.4.12, 3.5.0.1, 3.5.0.2, 3.5.0.3, 3.5.0.4, 3.5.1, 3.5.2, 3.5.3, 3.5.4, 3.5.5, 3.5.6, 3.5.7, 3.5.8, 3.5.9, 3.5.10, 3.5.11, 3.5.12, 3.5.13, 3.5.14, 3.5.15, 3.5.16, 3.5.17, 3.5.18, 3.5.19, 3.5.20, 3.5.21, 3.5.22, 3.5.23, 3.5.24, 3.5.25, 3.5.26, 3.5.27, 3.5.28, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6, 4.0.7, 4.0.8, 4.0.9, 4.0.10, 4.0.11, 4.0.12, 4.0.13, 4.0.14, 4.0.15, 4.0.16, 4.0.17, 4.0.18, 4.0.19, 4.0.20, 4.0.21, 4.0.22, 4.0.23, 4.0.24, 4.0.25, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9

CPE External links

http://www.squid-cache.org/Advisories/SQUID-2020_1.txt
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2020_1.patch
http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-8e657e835965c3a011375feaa0359921c5b3e2dd.patch
http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_1.patch
http://www.squid-cache.org/Versions/v4/changesets/squid-4-b3a0719affab099c684f1cd62b79ab02816fa962.patch
http://www.squid-cache.org/Versions/v4/changesets/squid-4-d8e4715992d0e530871519549add5519cbac0598.patch

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

3) Out-of-bounds read

Risk: Medium

CVSSv3: 5.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-12528

CWE-ID: CWE-125 - Out-of-bounds Read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when translating FTP server listing into HTTP responses. A remote attacker can trick the victim into vising a specially crafted FTP server, trigger out-of-bounds read and gain access to memory contents of the heap.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Squid: 2.0.patch1, 2.0.patch2, 2.0.pre1, 2.0.release, 2.0_patch2, 2.1.patch1, 2.1.patch2, 2.1.pre1, 2.1.pre3, 2.1.pre4, 2.1.release, 2.1_patch2, 2.2.devel3, 2.2.devel4, 2.2.pre1, 2.2.pre2, 2.2.stable1, 2.2.stable2, 2.2.stable3, 2.2.stable4, 2.2.stable5, 2.3.devel2, 2.3.devel3, 2.3.stable1, 2.3.stable2, 2.3.stable3, 2.3.stable4, 2.3.stable5, 2.3_.stable4, 2.3_.stable5, 2.3_stable5, 2.4, 2.4.stable1, 2.4.stable2, 2.4.stable3, 2.4.stable4, 2.4.stable6, 2.4.stable7, 2.4_.stable2, 2.4_.stable6, 2.4_.stable7, 2.4_9, 2.4_stable7, 2.4_stable_2, 2.4_stable_3, 2.5.6, 2.5.9, 2.5.stable1, 2.5.stable2, 2.5.stable3, 2.5.stable4, 2.5.stable5, 2.5.stable6, 2.5.stable7, 2.5.stable8, 2.5.stable9, 2.5.stable10, 2.5.stable11, 2.5_.stable1, 2.5_.stable3, 2.5_.stable4, 2.5_.stable5, 2.5_.stable6, 2.5_stable3, 2.5_stable4, 2.5_stable9, 2.6.stable1, 2.6.stable2, 2.6.stable3, 2.6.stable4, 2.6.stable5, 2.6.stable6, 2.7.RC2, 2.7.stable1, 2.7.stable2, 2.7.stable3, 2.7.stable4, 2.7.stable5, 2.7.STABLE6, 2.7.STABLE7, 2.7.STABLE8, 2.7.STABLE9, 3.0, 3.0.stable1, 3.0.stable2, 3.0.stable3, 3.0.stable4, 3.0.stable5, 3.0.stable6, 3.0.stable7, 3.0.stable8, 3.0.stable9, 3.0.stable10, 3.0.stable11, 3.0.stable12, 3.1, 3.1.0.1, 3.1.0.2, 3.1.0.3, 3.1.0.4, 3.2.0.1, 3.2.0.2, 3.2.0.3, 3.2.0.4, 3.2.0.5, 3.2.0.6, 3.2.0.7, 3.2.0.8, 3.2.0.9, 3.2.0.10, 3.2.0.11, 3.2.0.12, 3.2.0.13, 3.2.0.14, 3.2.0.15, 3.2.0.16, 3.2.0.17, 3.2.0.18, 3.2.0.19, 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 3.2.10, 3.2.11, 3.2.12, 3.2.13, 3.3.0, 3.3.0.1, 3.3.0.2, 3.3.0.3, 3.3.1, 3.3.2, 3.3.3, 3.3.4, 3.3.5, 3.3.6, 3.3.7, 3.3.8, 3.3.9, 3.3.10, 3.3.11, 3.3.12, 3.3.13, 3.4.0.1, 3.4.0.2, 3.4.0.3, 3.4.1, 3.4.2, 3.4.3, 3.4.4, 3.4.5, 3.4.6, 3.4.7, 3.4.8, 3.4.9, 3.4.10, 3.4.11, 3.4.12, 3.5.0.1, 3.5.0.2, 3.5.0.3, 3.5.0.4, 3.5.1, 3.5.2, 3.5.3, 3.5.4, 3.5.5, 3.5.6, 3.5.7, 3.5.8, 3.5.9, 3.5.10, 3.5.11, 3.5.12, 3.5.13, 3.5.14, 3.5.15, 3.5.16, 3.5.17, 3.5.18, 3.5.19, 3.5.20, 3.5.21, 3.5.22, 3.5.23, 3.5.24, 3.5.25, 3.5.26, 3.5.27, 3.5.28, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6, 4.0.7, 4.0.8, 4.0.9, 4.0.10, 4.0.11, 4.0.12, 4.0.13, 4.0.14, 4.0.15, 4.0.16, 4.0.17, 4.0.18, 4.0.19, 4.0.20, 4.0.21, 4.0.22, 4.0.23, 4.0.24, 4.0.25, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9

CPE External links

http://www.squid-cache.org/Advisories/SQUID-2020_2.txt

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

4) Buffer overflow

Risk: Medium

CVSSv3: 6.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-8517

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in the NTLM authentication credentials parser in ext_lm_group_acl. A remote attacker can send a specially crafted HTTP request to the affected proxy server, trigger memory corruption and perform a denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Squid: 2.0.patch1, 2.0.patch2, 2.0.pre1, 2.0.release, 2.0_patch2, 2.1.patch1, 2.1.patch2, 2.1.pre1, 2.1.pre3, 2.1.pre4, 2.1.release, 2.1_patch2, 2.2.devel3, 2.2.devel4, 2.2.pre1, 2.2.pre2, 2.2.stable1, 2.2.stable2, 2.2.stable3, 2.2.stable4, 2.2.stable5, 2.3.devel2, 2.3.devel3, 2.3.stable1, 2.3.stable2, 2.3.stable3, 2.3.stable4, 2.3.stable5, 2.3_.stable4, 2.3_.stable5, 2.3_stable5, 2.4, 2.4.stable1, 2.4.stable2, 2.4.stable3, 2.4.stable4, 2.4.stable6, 2.4.stable7, 2.4_.stable2, 2.4_.stable6, 2.4_.stable7, 2.4_9, 2.4_stable7, 2.4_stable_2, 2.4_stable_3, 2.5.6, 2.5.9, 2.5.stable1, 2.5.stable2, 2.5.stable3, 2.5.stable4, 2.5.stable5, 2.5.stable6, 2.5.stable7, 2.5.stable8, 2.5.stable9, 2.5.stable10, 2.5.stable11, 2.5_.stable1, 2.5_.stable3, 2.5_.stable4, 2.5_.stable5, 2.5_.stable6, 2.5_stable3, 2.5_stable4, 2.5_stable9, 2.6.stable1, 2.6.stable2, 2.6.stable3, 2.6.stable4, 2.6.stable5, 2.6.stable6, 2.7.RC2, 2.7.stable1, 2.7.stable2, 2.7.stable3, 2.7.stable4, 2.7.stable5, 2.7.STABLE6, 2.7.STABLE7, 2.7.STABLE8, 2.7.STABLE9, 3.0, 3.0.stable1, 3.0.stable2, 3.0.stable3, 3.0.stable4, 3.0.stable5, 3.0.stable6, 3.0.stable7, 3.0.stable8, 3.0.stable9, 3.0.stable10, 3.0.stable11, 3.0.stable12, 3.1, 3.1.0.1, 3.1.0.2, 3.1.0.3, 3.1.0.4, 3.2.0.1, 3.2.0.2, 3.2.0.3, 3.2.0.4, 3.2.0.5, 3.2.0.6, 3.2.0.7, 3.2.0.8, 3.2.0.9, 3.2.0.10, 3.2.0.11, 3.2.0.12, 3.2.0.13, 3.2.0.14, 3.2.0.15, 3.2.0.16, 3.2.0.17, 3.2.0.18, 3.2.0.19, 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 3.2.10, 3.2.11, 3.2.12, 3.2.13, 3.3.0, 3.3.0.1, 3.3.0.2, 3.3.0.3, 3.3.1, 3.3.2, 3.3.3, 3.3.4, 3.3.5, 3.3.6, 3.3.7, 3.3.8, 3.3.9, 3.3.10, 3.3.11, 3.3.12, 3.3.13, 3.4.0.1, 3.4.0.2, 3.4.0.3, 3.4.1, 3.4.2, 3.4.3, 3.4.4, 3.4.5, 3.4.6, 3.4.7, 3.4.8, 3.4.9, 3.4.10, 3.4.11, 3.4.12, 3.5.0.1, 3.5.0.2, 3.5.0.3, 3.5.0.4, 3.5.1, 3.5.2, 3.5.3, 3.5.4, 3.5.5, 3.5.6, 3.5.7, 3.5.8, 3.5.9, 3.5.10, 3.5.11, 3.5.12, 3.5.13, 3.5.14, 3.5.15, 3.5.16, 3.5.17, 3.5.18, 3.5.19, 3.5.20, 3.5.21, 3.5.22, 3.5.23, 3.5.24, 3.5.25, 3.5.26, 3.5.27, 3.5.28, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6, 4.0.7, 4.0.8, 4.0.9, 4.0.10, 4.0.11, 4.0.12, 4.0.13, 4.0.14, 4.0.15, 4.0.16, 4.0.17, 4.0.18, 4.0.19, 4.0.20, 4.0.21, 4.0.22, 4.0.23, 4.0.24, 4.0.25, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9

CPE External links

http://www.squid-cache.org/Advisories/SQUID-2020_3.txt

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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