CVE-2017-2784
An exploitable free of a stack pointer vulnerability exists in the x509 certificate parsing code of ARM mbed TLS before 1.3.19, 2.x before 2.1.7, and 2.4.x before 2.4.2.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.42%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An exploitable free of a stack pointer vulnerability exists in the x509 certificate parsing code of ARM mbed TLS before 1.3.19, 2.x before 2.1.7, and 2.4.x before 2.4.2. A specially crafted x509 certificate, when parsed by mbed TLS library, can cause an invalid free of a stack pointer leading to a potential remote code execution. In order to exploit this vulnerability, an attacker can act as either a client or a server on a network to deliver malicious x509 certificates to vulnerable applications.
- CVSS 3.0
- 8.1 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.42% probability · 89th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- trustedfirmware/mbed tls
- Source
- talos-cna@cisco.com
EPSS 3.4% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.talosintelligence.com/reports/TALOS-2017-0274/Exploit, Technical Description, Third Party Advisory, VDB Entry
- https://security.gentoo.org/glsa/201706-18
- https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2017-01Mitigation, Vendor Advisory
- http://www.talosintelligence.com/reports/TALOS-2017-0274/Exploit, Technical Description, Third Party Advisory, VDB Entry
- https://security.gentoo.org/glsa/201706-18
- https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2017-01Mitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.