OpenSSL Vulnerability — Ubuntu Security Update (USN-8625-1)
It was discovered that OpenSSL incorrectly allocated memory buffers in the SSL/TLS state machine when receiving handshake data. A remote attacker could possibly use this issue to cause OpenSSL to consume excessive memory, leading to a denial of service. This issue is known as the "HollowByte" denial of service.
Packages
- openssl – Secure Socket Layer (SSL) cryptographic library and tools
Details
It was discovered that OpenSSL incorrectly allocated memory buffers in the
SSL/TLS state machine when receiving handshake data. A remote attacker
could possibly use this issue to cause OpenSSL to consume excessive memory,
leading to a denial of service. This issue is known as the “HollowByte”
denial of service.
It was discovered that OpenSSL incorrectly allocated memory buffers in the
SSL/TLS state machine when receiving handshake data. A remote attacker
could possibly use this issue to cause OpenSSL to consume excessive memory,
leading to a denial of service. This issue is known as the “HollowByte”
denial of service.
Update instructions
After a standard system update you need to reboot your computer to make all
the necessary changes.
The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
|
26.04
LTS resolute |
libssl3t64 – | ||
| openssl – | |||
|
24.04
LTS noble |
libssl3t64 – | ||
| openssl – | |||
|
22.04
LTS jammy |
libssl3 – | ||
| openssl – | |||
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How to Apply the Fix
Update the affected packages on your server to the patched release, then restart the relevant services.
sudo apt update && sudo apt upgradeCheck your system for vulnerabilities
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