Apple macOS 10.10 privilege escalation via DYLD_PRINT_TO_FILE
Free public brief. The indicators, the detections with Splunk and KQL already written, and a Slack alert the next time this touches a vendor you run are in the app — free account, no card.
Environment variable overflow in macOS 10.10.0–10.10.4 allows local privilege escalation through arbitrary file write.
A local privilege escalation vulnerability exists in Apple macOS 10.10 (Yosemite) versions 10.10.0 through 10.10.4. The flaw involves improper handling of the DYLD_PRINT_TO_FILE environment variable, which is used to direct system error logging to a specified file. An attacker can exploit this by overflowing or manipulating the variable to achieve arbitrary file write with elevated privileges, leading to privilege escalation. This vulnerability is specific to macOS 10.10 and does not affect earlier versions. The affected environment variable functionality was introduced in version 10.10, making prior releases unaffected. Patches are available from Apple and defenders should apply them immediately to affected systems.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/alerte/CERTFR-2015-ALE-009
What this brief leaves out
This page is the free tier: the write-up, the severity, the names. In the app the same report carries its extracted indicators, its detections with the Splunk SPL and Microsoft KQL already written, the actors and CVEs it names as live profiles, and the vendor research on the same campaign — the primary source the news paraphrased, cited and read directly.
It sits in a corpus of 9,789 reports from 155 sources, 1,534 of them written in the last seven days, and it grows through the day.
A new account starts with three days of all of it, no card, then keeps the government and CERT reporting free. Name the vendors you run and Slack hears about the reports that touch them — about forty a week that are yours, not the four hundred that are not.
Create a free account What it costs