CVE-2017-9109

An issue was discovered in adns before 1.5.2

published June 18, 2020

CVSS
—
EPSS
2%
Percentile
80.4
In the wild
Unconfirmed
What it is

⚠️ This pesky flaw in adns means it can get a bit confused when handling CNAME records — like a waiter misplacing your order while serving multiple tables! Imagine a restaurant where the waiter jumbles together orders from different tables, leading to a mix-up between a burger and a salad. In the digital world, adns is like that waiter, struggling to differentiate CNAME records when answers are interleaved — it can cause major confusion! If an attacker takes advantage of this flaw, they could potentially manipulate the answer data structure on the heap, leading to unexpected behavior. This could allow attackers to execute arbitrary code, potentially compromising the integrity of the system. While no known exploits have surfaced, the risk is as real as a dinner guest mistaking your meal for theirs!

Put simply

Imagine a restaurant where the waiter jumbles together orders from different tables, leading to a mix-up between a burger and a salad. In the digital world, adns is like that waiter, struggling to differentiate CNAME records when answers are interleaved — it can cause major confusion! This vulnerability arises from adns failing to properly ignore ambiguous answers prior to the first Resource Record (RR), causing it to mishandle CNAME responses and risk heap overruns.

What to do

If an attacker takes advantage of this flaw, they could potentially manipulate the answer data structure on the heap, leading to unexpected behavior. This could allow attackers to execute arbitrary code, potentially compromising the integrity of the system. While no known exploits have surfaced, the risk is as real as a dinner guest mistaking your meal for theirs! To mitigate this vulnerability, upgrade adns to version 1.5.2 or later immediately. Review your configurations to ensure proper handling of CNAME records. Regularly audit your DNS implementations for similar issues. You've got this! By taking these steps, you'll ensure your DNS system is running smoothly and securely. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01994 · 80.4th percentile
Published
2020-06-18T13:02Z
EPSS history
Timeline
  • 18 JUN 13:02Z
    An issue was discovered in adns before 1.5.2
    cvelistv5