Integer overflow in PHP
CVE-2016-5769
Multiple integer overflows in mcrypt.c in the mcrypt extension in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8 allow remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted length value, related to the (1) mcrypt_generic and (2) mdecrypt_generic functions.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.084 (94.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.084 · newest: 0.084 · change: 0.000
Affected products
- PHP — versions 5.6.0, 5.6.1, 5.6.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apple.com/archives/security-announce/2016/Sep/msg00006.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.html (vendor-advisory)
- lists.opensuse.org/opensuse-updates/2016-08/msg00003.html (vendor-advisory)
- github.com/php/php-src/commit/6c5211a0cef0cc2854eaa387e0eb036e012904d0
- php.net/ChangeLog-5.php (Patch, Release Notes)
- www.openwall.com/lists/oss-security/2016/06/23/4 (mailing-list, Release Notes)
- www.debian.org/security/2016/dsa-3618 (vendor-advisory)
- php.net/ChangeLog-7.php (Broken Link)
- bugs.php.net/bug.php (Vendor Advisory)
- www.securityfocus.com/bid/91399 (vdb-entry)
Frequently asked questions
- What is CVE-2016-5769?
- CVE-2016-5769 is a critical-severity vulnerability in PHP, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2016-08-07.
- How severe is CVE-2016-5769?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2016-5769 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.