Detections
Analytics

Azure Linux 3.0 Security Update: edk2 / hvloader / openssl (CVE-2024-4741)

high Nessus Plugin ID 234630

Synopsis

The remote Azure Linux host is missing one or more security updates.

Description

The version of edk2 / hvloader / openssl installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-4741 advisory.

 - Issue summary: Calling the OpenSSL API function SSL_free_buffers May cause memory to be accessed that was previously freed in some situations Impact summary: A use after free can have a range of potential consequences such as the corruption of valid data, crashes or execution of arbitrary code. However, only applications that directly call the SSL_free_buffers function are affected by this issue. Applications that do not call this function are not vulnerable. Our investigations indicate that this function is rarely used by applications. The SSL_free_buffers function is used to free the internal OpenSSL buffer used when processing an incoming record from the network. The call is only expected to succeed if the buffer is not currently in use. However, two scenarios have been identified where the buffer is freed even when still in use. The first scenario occurs where a record header has been received from the network and processed by OpenSSL, but the full record body has not yet arrived. In this case calling SSL_free_buffers will succeed even though a record has only been partially processed and the buffer is still in use. The second scenario occurs where a full record containing application data has been received and processed by OpenSSL but the application has only read part of this data. Again a call to SSL_free_buffers will succeed even though the buffer is still in use. While these scenarios could occur accidentally during normal operation a malicious attacker could attempt to engineer a stituation where this occurs. We are not aware of this issue being actively exploited. The FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue. (CVE-2024-4741)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://nvd.nist.gov/vuln/detail/CVE-2024-4741

Plugin Details

Severity: High

ID: 234630

File Name: azure_linux_CVE-2024-4741.nasl

Version: 1.1

Type: local

Published: 4/19/2025

Updated: 4/19/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:C

CVSS Score Source: CVE-2024-4741

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:microsoft:azure_linux:edk2-tools, p-cpe:/a:microsoft:azure_linux:edk2-ovmf, p-cpe:/a:microsoft:azure_linux:edk2-experimental, p-cpe:/a:microsoft:azure_linux:hvloader, p-cpe:/a:microsoft:azure_linux:openssl, p-cpe:/a:microsoft:azure_linux:openssl-devel, p-cpe:/a:microsoft:azure_linux:edk2-ovmf-xen, p-cpe:/a:microsoft:azure_linux:edk2-hvloader, x-cpe:/o:microsoft:azure_linux, p-cpe:/a:microsoft:azure_linux:edk2-tools-python, p-cpe:/a:microsoft:azure_linux:openssl-static, p-cpe:/a:microsoft:azure_linux:openssl-libs, p-cpe:/a:microsoft:azure_linux:edk2-ext4, p-cpe:/a:microsoft:azure_linux:edk2-debuginfo, p-cpe:/a:microsoft:azure_linux:edk2-tools-doc, p-cpe:/a:microsoft:azure_linux:openssl-perl, p-cpe:/a:microsoft:azure_linux:edk2-ovmf-ia32

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AzureLinux/release, Host/AzureLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 4/8/2025

Vulnerability Publication Date: 5/16/2024

Reference Information

CVE: CVE-2024-4741

IAVA: 2024-A-0321-S