Detections
Analytics
Azure Linux 3.0 Security Update: cloud-hypervisor / edk2 / hvloader / openssl / rust (CVE-2022-4450)
critical Nessus Plugin ID 215573
Synopsis
The remote Azure Linux host is missing one or more security updates.Description
The version of cloud-hypervisor / edk2 / hvloader / openssl / rust 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-2022-4450 advisory.- The function PEM_read_bio_ex() reads a PEM file from a BIO and parses and decodes the name (e.g.
CERTIFICATE), any header data and the payload data. If the function succeeds then the name_out, header and data arguments are populated with pointers to buffers containing the relevant decoded data.
The caller is responsible for freeing those buffers. It is possible to construct a PEM file that results in 0 bytes of payload data. In this case PEM_read_bio_ex() will return a failure code but will populate the header argument with a pointer to a buffer that has already been freed. If the caller also frees this buffer then a double free will occur. This will most likely lead to a crash. This could be exploited by an attacker who has the ability to supply malicious PEM files for parsing to achieve a denial of service attack. The functions PEM_read_bio() and PEM_read() are simple wrappers around PEM_read_bio_ex() and therefore these functions are also directly affected. These functions are also called indirectly by a number of other OpenSSL functions including PEM_X509_INFO_read_bio_ex() and SSL_CTX_use_serverinfo_file() which are also vulnerable. Some OpenSSL internal uses of these functions are not vulnerable because the caller does not free the header argument if PEM_read_bio_ex() returns a failure code. These locations include the PEM_read_bio_TYPE() functions as well as the decoders introduced in OpenSSL 3.0. The OpenSSL asn1parse command line application is also impacted by this issue. (CVE-2022-4450)
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
Plugin Details
Severity: Critical
ID: 215573
File Name: azure_linux_CVE-2022-4450.nasl
Version: 1.1
Type: local
Published: 2/10/2025
Updated: 2/10/2025
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2022-4450
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
CVSS v4
Risk Factor: Critical
Base Score: 9.3
Threat Score: 8.1
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Vulnerability Information
CPE: p-cpe:/a:microsoft:azure_linux:edk2-tools, p-cpe:/a:microsoft:azure_linux:rust, p-cpe:/a:microsoft:azure_linux:hvloader, p-cpe:/a:microsoft:azure_linux:rust-debuginfo, p-cpe:/a:microsoft:azure_linux:edk2-ovmf-xen, x-cpe:/o:microsoft:azure_linux, p-cpe:/a:microsoft:azure_linux:openssl-static, p-cpe:/a:microsoft:azure_linux:edk2-experimental, p-cpe:/a:microsoft:azure_linux:edk2-ext4, p-cpe:/a:microsoft:azure_linux:edk2-ovmf-ia32, p-cpe:/a:microsoft:azure_linux:openssl, p-cpe:/a:microsoft:azure_linux:openssl-devel, p-cpe:/a:microsoft:azure_linux:edk2-tools-python, p-cpe:/a:microsoft:azure_linux:openssl-libs, p-cpe:/a:microsoft:azure_linux:openssl-debuginfo, p-cpe:/a:microsoft:azure_linux:openssl-perl, p-cpe:/a:microsoft:azure_linux:edk2-ovmf, p-cpe:/a:microsoft:azure_linux:cloud-hypervisor, p-cpe:/a:microsoft:azure_linux:edk2-tools-doc, p-cpe:/a:microsoft:azure_linux:rust-doc
Required KB Items: Host/local_checks_enabled, Host/AzureLinux/release, Host/AzureLinux/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 8/13/2024
Vulnerability Publication Date: 2/7/2023
Reference Information
CVE: CVE-2022-4450
IAVA: 2022-A-0518-S, 2023-A-0462-S