CVE-2021-47401
ipack: ipoctal: fix stack information leak
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: ipack: ipoctal: fix stack information leak The tty driver name is used also after registering the driver and must specifically not be allocated on the stack to avoid leaking information to user space (or triggering an oops). Drivers should not try to encode topology information in the tty device name but this one snuck in through staging without anyone noticing and another driver has since copied this malpractice. Fixing the ABI is a separate issue, but this at least plugs the security hole.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
3.5
References 8
git.kernel.org
- stable/c/acb96e782bad427ca4bb1bd94af660acd1462380
- stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0
- stable/c/2725925982dc96a78069cd118ea3d66759bfdad7
- stable/c/829f13d6079cf7a2465522f39acb43033e9b320d
- stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7
- stable/c/5f6a309a699675680df15d9b6d389114515b4426
- stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575
- stable/c/a89936cce87d60766a75732a9e7e25c51164f47c