Improper Certificate Validation Affecting polarssl package, versions <1.3.9-2.1+deb8u2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN8-POLARSSL-344576
- published20 Apr 2017
- disclosed20 Apr 2017
Introduced: 20 Apr 2017
CVE-2017-2784 (opens in a new tab)How to fix?
Upgrade Debian:8 polarssl to version 1.3.9-2.1+deb8u2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream polarssl package and not the polarssl package as distributed by Debian.
See How to fix? for Debian:8 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2017-2784
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-2784
- https://security.gentoo.org/glsa/201706-18
- https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2017-01
- http://www.talosintelligence.com/reports/TALOS-2017-0274/
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-2784