Amazon Linux AMI update for squid



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-46784
CVE-2022-41318
CWE-ID CWE-617
CWE-125
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 2 vulnerabilities.

1) Reachable Assertion

EUVDB-ID: #VU64484

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-2021-46784

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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

The vulnerability exists due to a reachable assertion when processing Gopher server responses. A remote attacker can send a specially crafted response to the proxy server and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    squid-3.5.20-17.43.amzn1.i686
    squid-migration-script-3.5.20-17.43.amzn1.i686
    squid-debuginfo-3.5.20-17.43.amzn1.i686

src:
    squid-3.5.20-17.43.amzn1.src

x86_64:
    squid-3.5.20-17.43.amzn1.x86_64
    squid-migration-script-3.5.20-17.43.amzn1.x86_64
    squid-debuginfo-3.5.20-17.43.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

squid: before 3.5.20-17.43

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2023-1677.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) Out-of-bounds read

EUVDB-ID: #VU67609

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-41318

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 or crash the server.

The vulnerability exists due to a boundary condition within SSPI and SMB authentication helpers. A remote attacker can trigger an out-of-bounds read error and read contents of memory on the system or crash the server.

Successful exploitation of the vulnerability requires that Squid is configured to use NTLM or Negotiate authentication with one of the vulnerable helpers.

Mitigation

Update the affected packages:

i686:
    squid-3.5.20-17.43.amzn1.i686
    squid-migration-script-3.5.20-17.43.amzn1.i686
    squid-debuginfo-3.5.20-17.43.amzn1.i686

src:
    squid-3.5.20-17.43.amzn1.src

x86_64:
    squid-3.5.20-17.43.amzn1.x86_64
    squid-migration-script-3.5.20-17.43.amzn1.x86_64
    squid-debuginfo-3.5.20-17.43.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

squid: before 3.5.20-17.43

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2023-1677.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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