CVE-2017-18075
First published: Wed Jan 24 2018(Updated: )
crypto/pcrypt.c in the Linux kernel before 4.14.13 mishandles freeing instances, allowing a local user able to access the AF_ALG-based AEAD interface (CONFIG_CRYPTO_USER_API_AEAD) and pcrypt (CONFIG_CRYPTO_PCRYPT) to cause a denial of service (kfree of an incorrect pointer) or possibly have unspecified other impact by executing a crafted sequence of system calls.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=4.2<4.4.111 | |
| Linux Linux kernel | >=4.5<4.9.76 | |
| Linux Linux kernel | >=4.10<4.14.13 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| redhat/kernel | <4.14.13 | 4.14.13 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d76c68109f37cb85b243a1cf0f40313afd2bae68
- http://www.securityfocus.com/bid/102813
- https://access.redhat.com/errata/RHSA-2018:2948
- https://github.com/torvalds/linux/commit/d76c68109f37cb85b243a1cf0f40313afd2bae68
- https://usn.ubuntu.com/3619-1/
- https://usn.ubuntu.com/3619-2/
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.13
- https://launchpad.net/bugs/cve/CVE-2017-18075
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d76c68109f37cb85b243a1cf0f40313afd2bae68
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1546457
- https://bugzilla.redhat.com/show_bug.cgi?id=1539508
- https://git.kernel.org/linus/d76c68109f37cb85b243a1cf0f40313afd2bae68
- https://security-tracker.debian.org/tracker/CVE-2017-18075
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18075
- https://nvd.nist.gov/vuln/detail/CVE-2017-18075
- https://ubuntu.com/security/CVE-2017-18075
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2017-18075.
What is the severity level of CVE-2017-18075?
CVE-2017-18075 has a severity level of medium.
Which software versions are affected by CVE-2017-18075?
The affected software versions include Linux kernel versions before 4.14.13.
How can a local user exploit this vulnerability?
A local user with access to the AF_ALG-based AEAD interface and pcrypt can exploit this vulnerability to cause a denial of service or possibly have unspecified impact.
Where can I find more information about CVE-2017-18075?
You can find more information about CVE-2017-18075 at the following references: [Git commit link](http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d76c68109f37cb85b243a1cf0f40313afd2bae68), [GitHub commit link](https://github.com/torvalds/linux/commit/d76c68109f37cb85b243a1cf0f40313afd2bae68), [Kernel.org ChangeLog](https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.13).
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