CVE-2019-10639
Summary
| CVE | CVE-2019-10639 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2019-07-05 23:15:00 UTC |
| Updated | 2023-11-07 03:02:00 UTC |
| Description | The Linux kernel 4.x (starting from 4.1) and 5.x before 5.0.8 allows Information Exposure (partial kernel address disclosure), leading to a KASLR bypass. Specifically, it is possible to extract the KASLR kernel image offset using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). This key contains enough bits from a kernel address (of a static variable) so when the key is extracted (via enumeration), the offset of the kernel image is exposed. This attack can be carried out remotely, by the attacker forcing the target device to send UDP or ICMP (or certain other) traffic to attacker-controlled IP addresses. Forcing a server to send UDP traffic is trivial if the server is a DNS server. ICMP traffic is trivial if the server answers ICMP Echo requests (ping). For client targets, if the target visits the attacker's web page, then WebRTC or gQUIC can be used to force UDP traffic to attacker-controlled IP addresses. NOTE: this attack against KASLR became viable in 4.1 because IP ID generation was changed to have a dependency on an address associated with a network namespace. |
Risk And Classification
Problem Types: CWE-326
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
| Operating System | Linux | Linux Kernel | All | All | All | All |
| Operating System | Linux | Linux Kernel | All | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| kernel/git/torvalds/linux.git - Linux kernel source tree | MISC | git.kernel.org | Mailing List, Patch, Vendor Advisory |
| July 2019 Linux Kernel Vulnerabilities in NetApp Products | NetApp Product Security | CONFIRM | security.netapp.com | |
| Debian -- Security Information -- DSA-4497-1 linux | DEBIAN | www.debian.org | |
| cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8 | MISC | cdn.kernel.org | Mailing List, Release Notes, Vendor Advisory |
| netns: provide pure entropy for net_hash_mix() · torvalds/linux@355b985 · GitHub | MISC | github.com | Patch, Third Party Advisory |
| support.f5.com/csp/article/K32804955 | CONFIRM | support.f5.com | |
| support.f5.com/csp/article/K32804955 | CONFIRM | support.f5.com | |
| [security-announce] openSUSE-SU-2019:1716-1: important: Security update | SUSE | lists.opensuse.org | |
| USN-4118-1: Linux kernel (AWS) vulnerabilities | Ubuntu security notices | Ubuntu | UBUNTU | usn.ubuntu.com | |
| arxiv.org/pdf/1906.10478.pdf | MISC | arxiv.org | Third Party Advisory |
| myF5 | support.f5.com | ||
| [security-announce] openSUSE-SU-2019:1757-1: important: Security update | SUSE | lists.opensuse.org | |
| USN-4115-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu | UBUNTU | usn.ubuntu.com | |
| Bugtraq: [SECURITY] [DSA 4497-1] linux security update | BUGTRAQ | seclists.org | |
| [SECURITY] [DLA 1885-1] linux-4.9 security update | MLIST | lists.debian.org | |
| [SECURITY] [DLA 1862-1] linux security update | MLIST | lists.debian.org | |
| Oracle Critical Patch Update Advisory - April 2021 | MISC | www.oracle.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.