Amazon Linux AMI update for gnutls



Published: 2024-08-06
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2024-28834
CVE-2024-28835
CWE-ID CWE-310
CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Amazon Linux AMI
Operating systems & Components / Operating system

gnutls
Operating systems & Components / Operating system package or component

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Cryptographic issues

EUVDB-ID: #VU87671

Risk: Medium

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-28834

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to a side-channel attack when using the gnutls_privkey_sign_data2 API function with the "GNUTLS_PRIVKEY_FLAG_REPRODUCIBLE" flag. A remote attacker can launch Minerva attack and gain access to sensitive information.

Mitigation

Update the affected packages:

aarch64:
    gnutls-c++-debuginfo-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-utils-debuginfo-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-dane-debuginfo-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-debuginfo-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-dane-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-debugsource-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-c++-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-utils-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-devel-3.8.0-380.amzn2023.0.6.aarch64

src:
    gnutls-3.8.0-380.amzn2023.0.6.src

x86_64:
    gnutls-utils-debuginfo-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-c++-debuginfo-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-utils-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-debuginfo-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-dane-debuginfo-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-dane-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-c++-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-debugsource-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-devel-3.8.0-380.amzn2023.0.6.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

gnutls: before 3.8.0-380

CPE2.3 External links

http://alas.aws.amazon.com/AL2023/ALAS-2024-591.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) Input validation error

EUVDB-ID: #VU87672

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-28835

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 when parsing the cert_list_size parameter in the gnutls_x509_trust_list_verify_crt2() function in certtool. A remote attacker can pass specially crafted PEM encoded certificate chain that contains more than 16 certificates to the certtool and crash it.

Mitigation

Update the affected packages:

aarch64:
    gnutls-c++-debuginfo-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-utils-debuginfo-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-dane-debuginfo-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-debuginfo-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-dane-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-debugsource-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-c++-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-utils-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-3.8.0-380.amzn2023.0.6.aarch64
    gnutls-devel-3.8.0-380.amzn2023.0.6.aarch64

src:
    gnutls-3.8.0-380.amzn2023.0.6.src

x86_64:
    gnutls-utils-debuginfo-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-c++-debuginfo-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-utils-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-debuginfo-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-dane-debuginfo-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-dane-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-c++-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-debugsource-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-3.8.0-380.amzn2023.0.6.x86_64
    gnutls-devel-3.8.0-380.amzn2023.0.6.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

gnutls: before 3.8.0-380

CPE2.3 External links

http://alas.aws.amazon.com/AL2023/ALAS-2024-591.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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