CVE-2021-22948 Weak cryptography in https://github.com/revive-adserver/revive-adserver
Attackers can brute force session IDs due to insecure generation, potentially taking over user accounts in Revive Ad Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-22948?
CVE-2021-22948 is a high-severity vulnerability in Revive-Adserver Revive Adserver, published on 23 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Vulnerability in the generation of session IDs in revive-adserver < 5.3.0, based on the cryptographically insecure uniqid() PHP function. Under some circumstances, an attacker could theoretically be able to brute force session IDs in order to take over a specific account.
Which versions are affected by CVE-2021-22948?
It affects 1 product.
Products include Revive-Adserver Revive Adserver.
How do I fix CVE-2021-22948?
No fix has been published for CVE-2021-22948 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-22948 being exploited?
There is no known exploitation of CVE-2021-22948 in the wild and no public exploit code.
Other vulnerabilities in Revive-Adserver Revive Adserver
- CVE-2016-9124 Security feature bypass in Revive Adserver All versions before 3.2.3
- CVE-2016-9125 Auth bypass in Revive Adserver All versions before 3.2.3
- CVE-2017-5830 Deserialization in n/a
- CVE-2016-9470 Other in Revive Adserver All versions before 3.2.5 and 4.0.0
- CVE-2026-50741 Code injection in Adserver
Sources
Also known as GHSA-27g5-f3jp-4f93.