Amazon Linux AMI update for squid



Risk Medium
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2023-46724
CVE-2023-46728
CVE-2023-46846
CVE-2023-46848
CWE-ID CWE-295
CWE-120
CWE-476
CWE-444
CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

squid
Operating systems & Components / Operating system package or component

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Improper Certificate Validation

EUVDB-ID: #VU82906

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-46724

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation when processing a specially crafted SSL Certificate in a server certificate chain. A remote attacker can initiate a TLS Handshake with a specially crafted SSL certificate and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

aarch64:
    squid-debuginfo-5.8-1.amzn2023.0.2.aarch64
    squid-5.8-1.amzn2023.0.2.aarch64
    squid-debugsource-5.8-1.amzn2023.0.2.aarch64

src:
    squid-5.8-1.amzn2023.0.2.src

x86_64:
    squid-debuginfo-5.8-1.amzn2023.0.2.x86_64
    squid-5.8-1.amzn2023.0.2.x86_64
    squid-debugsource-5.8-1.amzn2023.0.2.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

squid: before 5.8-1

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-429.html


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) Buffer overflow

EUVDB-ID: #VU80476

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-2023-46724

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error when handling gopher responses. A remote attacker can trick the victim into connecting to a malicious gopher server, trigger a buffer overflow and crash the proxy server.

Mitigation

Update the affected packages:

aarch64:
    squid-debuginfo-5.8-1.amzn2023.0.2.aarch64
    squid-5.8-1.amzn2023.0.2.aarch64
    squid-debugsource-5.8-1.amzn2023.0.2.aarch64

src:
    squid-5.8-1.amzn2023.0.2.src

x86_64:
    squid-debuginfo-5.8-1.amzn2023.0.2.x86_64
    squid-5.8-1.amzn2023.0.2.x86_64
    squid-debugsource-5.8-1.amzn2023.0.2.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

squid: before 5.8-1

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-429.html


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) NULL pointer dereference

EUVDB-ID: #VU83379

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-2023-46728

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 a NULL pointer dereference error in Gopher gateway. A remote attacker can pass specially crafted data to the server and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

aarch64:
    squid-debuginfo-5.8-1.amzn2023.0.2.aarch64
    squid-5.8-1.amzn2023.0.2.aarch64
    squid-debugsource-5.8-1.amzn2023.0.2.aarch64

src:
    squid-5.8-1.amzn2023.0.2.src

x86_64:
    squid-debuginfo-5.8-1.amzn2023.0.2.x86_64
    squid-5.8-1.amzn2023.0.2.x86_64
    squid-debugsource-5.8-1.amzn2023.0.2.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

squid: before 5.8-1

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-429.html


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) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU82315

Risk: Medium

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

CVE-ID: CVE-2023-46846

CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests when parsing HTTP/1.1 and ICAP messages. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.

Mitigation

Update the affected packages:

aarch64:
    squid-debuginfo-5.8-1.amzn2023.0.2.aarch64
    squid-5.8-1.amzn2023.0.2.aarch64
    squid-debugsource-5.8-1.amzn2023.0.2.aarch64

src:
    squid-5.8-1.amzn2023.0.2.src

x86_64:
    squid-debuginfo-5.8-1.amzn2023.0.2.x86_64
    squid-5.8-1.amzn2023.0.2.x86_64
    squid-debugsource-5.8-1.amzn2023.0.2.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

squid: before 5.8-1

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-429.html


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) Input validation error

EUVDB-ID: #VU82907

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-46848

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send ftp:// URLs in HTTP Request messages or construct ftp:// URLs from FTP Native input and crash the proxy server.

Mitigation

Update the affected packages:

aarch64:
    squid-debuginfo-5.8-1.amzn2023.0.2.aarch64
    squid-5.8-1.amzn2023.0.2.aarch64
    squid-debugsource-5.8-1.amzn2023.0.2.aarch64

src:
    squid-5.8-1.amzn2023.0.2.src

x86_64:
    squid-debuginfo-5.8-1.amzn2023.0.2.x86_64
    squid-5.8-1.amzn2023.0.2.x86_64
    squid-debugsource-5.8-1.amzn2023.0.2.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

squid: before 5.8-1

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-429.html


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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