USN-2637-1: Linux kernel vulnerabilities
First published: Wed Jun 10 2015(Updated: )
Xiong Zhou discovered a bug in the way the EXT4 filesystem handles fallocate zero range functionality when the page size is greater than the block size. A local attacker could exploit this flaw to cause a denial of service (system crash). (CVE-2015-0275) Wen Xu discovered a use-after-free flaw in the Linux kernel's ipv4 ping support. A local user could exploit this flaw to cause a denial of service (system crash) or gain administrative privileges on the system. (CVE-2015-3636)
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/linux-image-3.16.0-39-lowlatency | <3.16.0-39.53 | 3.16.0-39.53 |
| Ubuntu gir1.2-packagekitglib-1.0 | =14.10 | |
| All of | ||
| ubuntu/linux-image-3.16.0-39-powerpc64-smp | <3.16.0-39.53 | 3.16.0-39.53 |
| Ubuntu gir1.2-packagekitglib-1.0 | =14.10 | |
| All of | ||
| ubuntu/linux-image-3.16.0-39-generic | <3.16.0-39.53 | 3.16.0-39.53 |
| Ubuntu gir1.2-packagekitglib-1.0 | =14.10 | |
| All of | ||
| ubuntu/linux-image-3.16.0-39-powerpc-smp | <3.16.0-39.53 | 3.16.0-39.53 |
| Ubuntu gir1.2-packagekitglib-1.0 | =14.10 | |
| All of | ||
| ubuntu/linux-image-3.16.0-39-powerpc-e500mc | <3.16.0-39.53 | 3.16.0-39.53 |
| Ubuntu gir1.2-packagekitglib-1.0 | =14.10 | |
| All of | ||
| ubuntu/linux-image-3.16.0-39-generic-lpae | <3.16.0-39.53 | 3.16.0-39.53 |
| Ubuntu gir1.2-packagekitglib-1.0 | =14.10 | |
| All of | ||
| ubuntu/linux-image-3.16.0-39-powerpc64-emb | <3.16.0-39.53 | 3.16.0-39.53 |
| Ubuntu gir1.2-packagekitglib-1.0 | =14.10 |
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Reference Links
- https://ubuntu.com/security/CVE-2015-0275
- https://ubuntu.com/security/CVE-2015-3636
- https://ubuntu.com/security/notices/USN-2635-1
- https://ubuntu.com/security/notices/USN-2636-1
- https://ubuntu.com/security/notices/USN-2638-1
- https://ubuntu.com/security/notices/USN-2633-1
- https://ubuntu.com/security/notices/USN-2634-1
- https://ubuntu.com/security/notices/USN-2631-1
- https://ubuntu.com/security/notices/USN-2632-1
- https://launchpad.net/ubuntu/+source/linux/3.16.0-39.53
- https://ubuntu.com/security/notices/USN-2637-1 (Advisory)
Frequently Asked Questions
What is the severity of USN-2637-1?
USN-2637-1 has a high severity level due to the potential for denial of service leading to system crashes.
How do I fix USN-2637-1?
To fix USN-2637-1, update your system to the recommended linux-image package version 3.16.0-39.53 or later.
What products are affected by USN-2637-1?
USN-2637-1 affects Ubuntu 14.10 on various linux-image packages including lowlatency, generic, and powerpc.
Can USN-2637-1 be exploited remotely?
No, USN-2637-1 requires local access for exploitation and does not pose a remote attack vector.
What does USN-2637-1 address specifically?
USN-2637-1 addresses a bug in the EXT4 filesystem related to the fallocate zero range functionality.
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