Fedora 41 update for mbedtls3.6



Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2024-45157
CVE-2024-45158
CVE-2024-45159
CWE-ID CWE-1059
CWE-121
CWE-287
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Fedora
Operating systems & Components / Operating system

mbedtls3.6
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Insufficient Technical Documentation

EUVDB-ID: #VU96647

Risk: Medium

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

CVE-ID: CVE-2024-45157

CWE-ID: CWE-1059 - Insufficient Technical Documentation

Exploit availability: No

Description

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

The vulnerability exists due to an error in product documentation. Unlike previously documented, enabling MBEDTLS_PSA_HMAC_DRBG_MD_TYPE does not cause the PSA subsystem to use HMAC_DRBG: it uses HMAC_DRBG only when MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG and  MBEDTLS_CTR_DRBG_C are disabled.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 41

mbedtls3.6: before 3.6.1-1.fc41

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2024-9a87127dd0


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) Stack-based buffer overflow

EUVDB-ID: #VU96650

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-2024-45158

CWE-ID: CWE-121 - Stack-based 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 within the mbedtls_ecdsa_der_to_raw() and
mbedtls_ecdsa_raw_to_der() functions when the bits parameter is larger than the
largest supported curve and PSA is disabled. A remote attacker can send specially crafted packets to the application, trigger a stack-based buffer overflow and perform a denial of service (DoS) attack.

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

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 41

mbedtls3.6: before 3.6.1-1.fc41

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2024-9a87127dd0


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) Improper Authentication

EUVDB-ID: #VU96651

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-45159

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to authenticate with a wrong certificate.

The vulnerability exists due to an error when a server enables optional authentication of the client and TLS 1.3 is used. if the client-provided certificate does not have appropriate values in keyUsage or extKeyUsage extensions, then the return value of mbedtls_ssl_get_verify_result() would incorrectly have the MBEDTLS_X509_BADCERT_KEY_USAGE and  MBEDTLS_X509_BADCERT_EXT_KEY_USAGE bits
clear. As a result, an attacker that had a certificate valid for uses other than TLS client authentication could be able to use it for TLS client authentication anyway.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 41

mbedtls3.6: before 3.6.1-1.fc41

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2024-9a87127dd0


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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