SB2025022525 - Denial of service in BIG-IP AFM libssh2 package

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2019-3859)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when processing packets in _libssh2_packet_require() and _libssh2_packet_requirev() functions. A remote attacker can trick the victim to connect to a malicious SSH server, trigger out-of-bounds read error and read contents of memory or crash the affected application.

2) Out-of-bounds read (CVE-ID: CVE-2019-3860)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when processing SFTP packets. A remote attacker can trick the victim to connect to a malicious SSH server, trigger out-of-bounds read error and read contents of memory or crash the affected application.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• https://my.f5.com/manage/s/article/K000149288