Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) Affecting wordpress package, versions <4.7.1+dfsg-1
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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- published15 Jan 2017
- disclosed15 Jan 2017
Introduced: 15 Jan 2017
CVE-2017-5493 (opens in a new tab)How to fix?
Upgrade Debian:12 wordpress to version 4.7.1+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream wordpress package and not the wordpress package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
wp-includes/ms-functions.php in the Multisite WordPress API in WordPress before 4.7.1 does not properly choose random numbers for keys, which makes it easier for remote attackers to bypass intended access restrictions via a crafted (1) site signup or (2) user signup.
References
- https://security-tracker.debian.org/tracker/CVE-2017-5493
- https://codex.wordpress.org/Version_4.7.1
- https://wordpress.org/news/2017/01/wordpress-4-7-1-security-and-maintenance-release/
- http://www.debian.org/security/2017/dsa-3779
- https://github.com/WordPress/WordPress/commit/cea9e2dc62abf777e06b12ec4ad9d1aaa49b29f4
- https://wpvulndb.com/vulnerabilities/8721
- http://www.openwall.com/lists/oss-security/2017/01/14/6
- http://www.securityfocus.com/bid/95401
- http://www.securitytracker.com/id/1037591
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-5493