Amazon Linux AMI update for amazon-ssm-agent



Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2023-29406
CVE-2023-29409
CVE-2023-3978
CWE-ID CWE-644
CWE-295
CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

amazon-ssm-agent
Operating systems & Components / Operating system package or component

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Improper Neutralization of HTTP Headers for Scripting Syntax

EUVDB-ID: #VU78327

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-2023-29406

CWE-ID: CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to improper input validation in HTTP/1 client when handling HTTP Host header. A remote non-authenticated attacker can send a specially crafted HTTP request with a maliciously crafted Host header and inject additional headers or entire requests.

Successful exploitation of the vulnerability may allow an attacker to perform cross-site scripting, cache poisoning or session hijacking attacks.

Mitigation

Update the affected packages:

aarch64:
    amazon-ssm-agent-debuginfo-3.2.1630.0-1.amzn2023.aarch64
    amazon-ssm-agent-3.2.1630.0-1.amzn2023.aarch64
    amazon-ssm-agent-debugsource-3.2.1630.0-1.amzn2023.aarch64

src:
    amazon-ssm-agent-3.2.1630.0-1.amzn2023.src

x86_64:
    amazon-ssm-agent-debuginfo-3.2.1630.0-1.amzn2023.x86_64
    amazon-ssm-agent-3.2.1630.0-1.amzn2023.x86_64
    amazon-ssm-agent-debugsource-3.2.1630.0-1.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

amazon-ssm-agent: All versions

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-373.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) Improper Certificate Validation

EUVDB-ID: #VU78913

Risk: Medium

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

CVE-ID: CVE-2023-29409

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to verifying certificate chains containing large RSA keys is slow. A remote attacker can cause a client/server to expend significant CPU time verifying signatures.

Mitigation

Update the affected packages:

aarch64:
    amazon-ssm-agent-debuginfo-3.2.1630.0-1.amzn2023.aarch64
    amazon-ssm-agent-3.2.1630.0-1.amzn2023.aarch64
    amazon-ssm-agent-debugsource-3.2.1630.0-1.amzn2023.aarch64

src:
    amazon-ssm-agent-3.2.1630.0-1.amzn2023.src

x86_64:
    amazon-ssm-agent-debuginfo-3.2.1630.0-1.amzn2023.x86_64
    amazon-ssm-agent-3.2.1630.0-1.amzn2023.x86_64
    amazon-ssm-agent-debugsource-3.2.1630.0-1.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

amazon-ssm-agent: All versions

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-373.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) Cross-site scripting

EUVDB-ID: #VU79294

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-3978

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Update the affected packages:

aarch64:
    amazon-ssm-agent-debuginfo-3.2.1630.0-1.amzn2023.aarch64
    amazon-ssm-agent-3.2.1630.0-1.amzn2023.aarch64
    amazon-ssm-agent-debugsource-3.2.1630.0-1.amzn2023.aarch64

src:
    amazon-ssm-agent-3.2.1630.0-1.amzn2023.src

x86_64:
    amazon-ssm-agent-debuginfo-3.2.1630.0-1.amzn2023.x86_64
    amazon-ssm-agent-3.2.1630.0-1.amzn2023.x86_64
    amazon-ssm-agent-debugsource-3.2.1630.0-1.amzn2023.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

amazon-ssm-agent: All versions

CPE2.3 External links

https://alas.aws.amazon.com/AL2023/ALAS-2023-373.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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