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CVE-2017-14648: Bladeenc: Buffer overflow

CVE-2017-14648 is rated critical with a CVSS v3.1 base score of 9.8 and affects Bladeenc. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

A global buffer overflow was discovered in the iteration_loop function in loop.c in BladeEnc version 0.94.2. The vulnerability causes an out-of-bounds write, which leads to remote denial of service or possibly code execution.

Severity breakdown

CVSS v3.1 9.8: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

• Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
• Attack complexity: Low. No special conditions; the attack can be repeated reliably.
• Privileges required: None. No account or prior access is needed.
• User interaction: None. No action from any user is needed.
• Scope: Unchanged. Impact stays within the vulnerable component.
• Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
• Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
• Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-787: Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Affected products

• Bladeenc: 0.94.2

References

• https://blogs.gentoo.org/ago/2017/09/19/bladeenc-global-buffer-overflow-in-iteration_loop-loop-c/
• https://security.gentoo.org/glsa/202107-18