A vulnerability in the ea_get function of the Linux Kernel could allow a local attacker to execute arbitrary code or cause a denial of service (DoS) condition on a targeted system.
The vulnerability is due to improper memory operations that are performed by the ea_get() function, as defined in the fs/jfs/xattr.c source code file of the affected software, when calling setxattr twice with two different extended attribute names on the same file. An attacker could exploit this vulnerability by creating a file or executing a program that submits malicious input to the targeted system. An exploit could trigger a slab-out-of-bounds condition, which the attacker could use to execute arbitrary code or cause a DoS condition.
Proof-of-concept (PoC) code that demonstrates an exploit of this vulnerability is publicly available.
Kernel.org has not confirmed the vulnerability and software updates are not available.
To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement could reduce the likelihood of a successful exploit.
At the time this alert was first published, a patch was available in the unofficial Linux Kernel Mailing List archive; however, the patch has not been pushed upstream to Linux Kernel distributions.
Administrators are advised to contact the vendor regarding future updates and releases.
Administrators are advised to allow only trusted users to access local systems.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators are advised to monitor critical systems.
At the time this alert was first published, Kernel.org had not released a security announcement.
At the time this alert was first published, Kernel.org had not released software updates.
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.