APR Lax Permissions Expose SHM Data on Unix (pre-1.7.5)
CVE-2023-49582 Published on August 26, 2024
Apache Portable Runtime (APR): Unexpected lax shared memory permissions
Lax permissions set by the Apache Portable Runtime library on Unix platforms would allow local users read access to named shared memory segments, potentially revealing sensitive application data.
This issue does not affect non-Unix platforms, or builds with APR_USE_SHMEM_SHMGET=1 (apr.h)
Users are recommended to upgrade to APR version 1.7.5, which fixes this issue.
Vulnerability Analysis
CVE-2023-49582 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Timeline
Discussion on public mailing list https://lists.apache.org/thread/h5f1c2dqm8bf5yfosw3rg85927p612l0
Reported to security team 280 days later.
fixed by r1920083 in 1.7.x. r1920062 is encouraged for functional reasons. 279 days later.
Weakness Type
Incorrect Permission Assignment for Critical Resource
The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. When a resource is given a permissions setting that provides access to a wider range of actors than required, it could lead to the exposure of sensitive information, or the modification of that resource by unintended parties. This is especially dangerous when the resource is related to program configuration, execution or sensitive user data.
Products Associated with CVE-2023-49582
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Affected Versions
Apache Software Foundation Apache Portable Runtime (APR):- Version 0.9.0, <= 1.7.4 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.