SB2025120211 - Ubuntu update for edk2
Published: December 2, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 31 secuirty vulnerabilities.
1) Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) (CVE-ID: CVE-2023-45236)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a predictable TCP Initial Sequence Number. A remote attacker on the local network can gain unauthorized access to sensitive information on the system.
2) Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) (CVE-ID: CVE-2023-45237)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a predictable TCP Initial Sequence Number. A remote attacker can gain unauthorized access to sensitive information on the system.
3) Division by zero (CVE-ID: CVE-2024-1298)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a divide by zero error when S3 sleep is activated in MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTablePei/FirmwarePerformancePei.c. A local user can perform a denial of service (DoS) attack.
4) Integer overflow (CVE-ID: CVE-2024-38796)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow in PeCoffLoaderRelocateImage. A remote user on the local network can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
5) Out-of-bounds read (CVE-ID: CVE-2024-38797)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the HashPeImageByType() function when reading PE files. A remote attacker can create a specially crafted PE file, trick the victim into opening it, trigger an out-of-bounds read error and read contents of memory on the system.
6) Integer overflow (CVE-ID: CVE-2024-38805)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to integer overflow within the iSCSI initiator. A remote user can send specially crafted data to the system, trigger an integer overflow and perform a denial of service (DoS) attack.
7) Out-of-bounds read (CVE-ID: CVE-2025-2295)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition. A malicious iSCSI target can cause a remote BIOS to reveal its memory contents with a specially crafted R2T message.
8) Uncaught exception (CVE-ID: CVE-2025-3770)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to unsafe handling of IDT register on SMM entry. A local user can trigger unexpected exceptions can execute arbitrary code with System Management Mode (SMM) privileges.
9) Out-of-bounds read (CVE-ID: CVE-2021-3712)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when processing ASN.1 strings related to a confusion with NULL termination of strings in array. A remote attacker can pass specially crafted data to the application to trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.
10) Infinite loop (CVE-ID: CVE-2022-0778)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop within the BN_mod_sqrt() function when processing an ASN.1 certificate that contains elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. A remote attacker can supply a specially crafted certificate to the TLS server or client, consume all available system resources and cause denial of service conditions.
11) Information Exposure Through Timing Discrepancy (CVE-ID: CVE-2022-4304)
The vulnerability allows a remote attacker to obtain sensitive information.
The vulnerability exists due to a timing based side channel exists in the OpenSSL RSA Decryption implementation. A remote attacker can perform a Bleichenbacher style attack and decrypt data sent over the network.
To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE.
12) Double Free (CVE-ID: CVE-2022-4450)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error within the PEM_read_bio_ex() function. A remote attacker can pass specially crafted PEM file to the application, trigger a double free error and perform a denial of service (DoS) attack.
13) Use-after-free (CVE-ID: CVE-2023-0215)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error within the BIO_new_NDEF function. A remote attacker can trigger a use-after-free error and perform a denial of service (DoS) attack.
14) Type Confusion (CVE-ID: CVE-2023-0286)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a type confusion error related to X.400 address processing inside an X.509 GeneralName. A remote attacker can pass specially crafted data to the application, trigger a type confusion error and perform a denial of service (DoS) attack or read memory contents.
In most cases, the attack requires the attacker to provide both the certificate chain and CRL, neither of which need to have a valid signature. If the attacker only controls one of these inputs, the other input must already contain an X.400 address as a CRL distribution point, which is uncommon. As such, this vulnerability is most likely to only affect applications which have implemented their own functionality for retrieving CRLs over a network.
15) Resource exhaustion (CVE-ID: CVE-2023-0464)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources when verifying X.509 certificate chains that include policy constraints. A remote attacker can create a specially crafted certificate to trigger resource exhaustion and perform a denial of service (DoS) attack.
16) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2023-0465)
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to an error when validating certificate policies in leaf certificates. A remote attacker that controls a malicious CA server can issue a certificate that will be validated by the application.
17) Security features bypass (CVE-ID: CVE-2023-0466)
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to an error within the X509_VERIFY_PARAM_add0_policy() function, which does not perform the certificate policy check despite being implicitly enabled. A remote attacker can bypass expected security restrictions and perform MitM attack.
18) Resource management error (CVE-ID: CVE-2023-2650)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the application when processing OCSP, PKCS7/SMIME, CMS, CMP/CRMF or TS subsystems with no message size limit. A remote attacker can send specially crafted data to the application and perform a denial of service (DoS) attack.
19) Resource management error (CVE-ID: CVE-2023-3446)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the DH_check(), DH_check_ex() and EVP_PKEY_param_check() function when processing a DH key or DH parameters. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
20) Resource management error (CVE-ID: CVE-2023-3817)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the application when checking the long DH keys. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
21) Resource management error (CVE-ID: CVE-2023-5678)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within DH_generate_key() and DH_check_pub_key() functions. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
22) Resource management error (CVE-ID: CVE-2023-6237)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the way the EVP_PKEY_public_check() function handles RSA public keys. A remote attacker can supply an RSA key obtained from an untrusted source and perform a denial of service (DoS) attack.
23) NULL pointer dereference (CVE-ID: CVE-2024-0727)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error when processing fields in the PKCS12 certificate. A remote attacker can pass specially crafted certificate to the server and perform a denial of service (DoS) attack.
24) Covert Timing Channel (CVE-ID: CVE-2024-13176)
The vulnerability allows a remote attacker to recover a private key.
The vulnerability exists due to a timing side-channel in ECDSA signature computations. A remote attacker can recover the private key and decrypt data.
Successful exploitation of the vulnerability requires that the attacker's process must either be located in the same physical computer or must have a very fast network connection with low latency.
25) Resource exhaustion (CVE-ID: CVE-2024-2511)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to unbounded memory growth when processing TLSv1.3 sessions. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
Successful exploitation of the vulnerability requires that the non-default SSL_OP_NO_TICKET option is being used in TLSv1.3.
26) Resource exhaustion (CVE-ID: CVE-2024-41996)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to unnecessary validation of the public keys in the Diffie-Hellman Key Agreement Protocol when an approved safe prime is used. A remote attacker from the client side can trigger unnecessarily expensive server-side DHE modular-exponentiation calculations and cause asymmetric resource consumption, resulting in a denial of service (DoS) attack.
27) Use-after-free (CVE-ID: CVE-2024-4741)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error within the SSL_free_buffers() function. A remote attacker can trigger a use-after-free error and perform a denial of service (DoS) attack.
Note, the vulnerability affects only applications that call the vulnerable function.
28) Out-of-bounds read (CVE-ID: CVE-2024-5535)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition within the SSL_select_next_proto() function when using NPN. A remote attacker can send specially crafted data to the application, trigger an out-of-bounds read and perform a denial of service (DoS) attack.
29) Type Confusion (CVE-ID: CVE-2024-6119)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a type confusion error when performing certificate name checks. A remote attacker can supply a specially crafted X.509 certificate to the server, trigger a type confusion error and perform a denial of service (DoS) attack.
30) Out-of-bounds write (CVE-ID: CVE-2024-9143)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error when using the low-level GF(2^m) elliptic curve APIs with untrusted explicit values for the field polynomial. A remote attacker can send specially crafted input to the server, trigger an out-of-bounds write and perform a denial of service (DoS) attack.
Note, the vulnerability can be exploited against the application in rare cases only that involve "exotic" curve encoding.
31) Out-of-bounds read (CVE-ID: CVE-2025-9232)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition in OpenSSL HTTP client API functions if the "no_proxy" environment variable is set and the host portion of the authority component of the HTTP URL is an IPv6 address. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.