Описание
Issue summary: The POLY1305 MAC (message authentication code) implementation
contains a bug that might corrupt the internal state of applications running
on PowerPC CPU based platforms if the CPU provides vector instructions.
Impact summary: If an attacker can influence whether the POLY1305 MAC
algorithm is used, the application state might be corrupted with various
application dependent consequences.
The POLY1305 MAC (message authentication code) implementation in OpenSSL for
PowerPC CPUs restores the contents of vector registers in a different order
than they are saved. Thus the contents of some of these vector registers
are corrupted when returning to the caller. The vulnerable code is used only
on newer PowerPC processors supporting the PowerISA 2.07 instructions.
The consequences of this kind of internal application state corruption can
be various - from no consequences, if the calling application does not
depend on the contents of non-volatile XMM registers at all, to the worst
consequences, where the attacker could get complete control of the application
process. However unless the compiler uses the vector registers for storing
pointers, the most likely consequence, if any, would be an incorrect result
of some application dependent calculations or a crash leading to a denial of
service.
The POLY1305 MAC algorithm is most frequently used as part of the
CHACHA20-POLY1305 AEAD (authenticated encryption with associated data)
algorithm. The most common usage of this AEAD cipher is with TLS protocol
versions 1.2 and 1.3. If this cipher is enabled on the server a malicious
client can influence whether this AEAD cipher is used. This implies that
TLS server applications using OpenSSL can be potentially impacted. However
we are currently not aware of any concrete application that would be affected
by this issue therefore we consider this a Low severity security issue.
A flaw was found in in the POLY1305 MAC (message authentication code) implementation in OpenSSL, affecting applications running on PowerPC CPU-based platforms that utilize vector instructions, and has the potential to corrupt the internal state of these applications. If an attacker can manipulate the utilization of the POLY1305 MAC algorithm, it may lead to the corruption of the application state, resulting in various application-dependent consequences, often resulting in a crash and leading to a denial of service.
Отчет
This vulnerability is categorized as having a Low severity due to the limited scope of its potential impact and the specific conditions required for exploitation. The vulnerability arises in the POLY1305 MAC implementation within OpenSSL on PowerPC CPUs, affecting newer processors supporting PowerISA 2.07 instructions. The issue involves the restoration of vector registers in a different order than they are saved, potentially corrupting application state upon return to the caller. The impact varies, contingent on the application's reliance on non-volatile XMM registers, ranging from incorrect calculations to potential denial of service. However, the practical exploitation of this vulnerability requires an attacker to influence the use of the POLY1305 MAC algorithm. Given the specific conditions needed for exploitation and the absence of concrete instances of affected applications, the overall risk is assessed as low. Additionally, the severity is tempered by the assumption that the most likely outcome is limited to incorrect results in application-dependent calculations or crashes, rather than enabling a full compromise of the application process.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | mariadb10.11 | Not affected | ||
| Red Hat Enterprise Linux 10 | mysql8.0 | Fix deferred | ||
| Red Hat Enterprise Linux 6 | mysql | Not affected | ||
| Red Hat Enterprise Linux 6 | openssl | Out of support scope | ||
| Red Hat Enterprise Linux 7 | mariadb | Not affected | ||
| Red Hat Enterprise Linux 7 | openssl | Out of support scope | ||
| Red Hat Enterprise Linux 7 | ovmf | Out of support scope | ||
| Red Hat Enterprise Linux 8 | compat-openssl10 | Not affected | ||
| Red Hat Enterprise Linux 8 | edk2 | Not affected | ||
| Red Hat Enterprise Linux 8 | mariadb:10.11/mariadb | Not affected |
Показывать по
Дополнительная информация
Статус:
EPSS
6.5 Medium
CVSS3
Связанные уязвимости
Issue summary: The POLY1305 MAC (message authentication code) implementation contains a bug that might corrupt the internal state of applications running on PowerPC CPU based platforms if the CPU provides vector instructions. Impact summary: If an attacker can influence whether the POLY1305 MAC algorithm is used, the application state might be corrupted with various application dependent consequences. The POLY1305 MAC (message authentication code) implementation in OpenSSL for PowerPC CPUs restores the contents of vector registers in a different order than they are saved. Thus the contents of some of these vector registers are corrupted when returning to the caller. The vulnerable code is used only on newer PowerPC processors supporting the PowerISA 2.07 instructions. The consequences of this kind of internal application state corruption can be various - from no consequences, if the calling application does not depend on the contents of non-volatile XMM registers at all, to the wors...
Issue summary: The POLY1305 MAC (message authentication code) implementation contains a bug that might corrupt the internal state of applications running on PowerPC CPU based platforms if the CPU provides vector instructions. Impact summary: If an attacker can influence whether the POLY1305 MAC algorithm is used, the application state might be corrupted with various application dependent consequences. The POLY1305 MAC (message authentication code) implementation in OpenSSL for PowerPC CPUs restores the contents of vector registers in a different order than they are saved. Thus the contents of some of these vector registers are corrupted when returning to the caller. The vulnerable code is used only on newer PowerPC processors supporting the PowerISA 2.07 instructions. The consequences of this kind of internal application state corruption can be various - from no consequences, if the calling application does not depend on the contents of non-volatile XMM registers at all, to the wors
Issue summary: The POLY1305 MAC (message authentication code) implemen ...
Issue summary: The POLY1305 MAC (message authentication code) implementation contains a bug that might corrupt the internal state of applications running on PowerPC CPU based platforms if the CPU provides vector instructions. Impact summary: If an attacker can influence whether the POLY1305 MAC algorithm is used, the application state might be corrupted with various application dependent consequences. The POLY1305 MAC (message authentication code) implementation in OpenSSL for PowerPC CPUs restores the contents of vector registers in a different order than they are saved. Thus the contents of some of these vector registers are corrupted when returning to the caller. The vulnerable code is used only on newer PowerPC processors supporting the PowerISA 2.07 instructions. The consequences of this kind of internal application state corruption can be various - from no consequences, if the calling application does not depend on the contents of non-volatile XMM registers at all, to the w...
EPSS
6.5 Medium
CVSS3