php: Integer Overflows in mcrypt_generic() and mdecrypt_generic() resulting in heap overflows
Published Aug 7, 2016
9.8
CRITICALCVSS 3.0
EPSS 8.36%
Description
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.
Affected products
No data.
- ≤ 5.5.36
- 5.6.0
- 5.6.0
- 5.6.0
- 5.6.0
- 5.6.0
- 5.6.0
- 5.6.0
- 5.6.0
- 5.6.0
- 5.6.1
- 5.6.2
- 5.6.3
- 5.6.4
- 5.6.5
- 5.6.6
- 5.6.7
- 5.6.8
- 5.6.9
- 5.6.10
- 5.6.11
- 5.6.12
- 5.6.13
- 5.6.14
- 5.6.15
- 5.6.16
- 5.6.17
- 5.6.18
- 5.6.19
- 5.6.20
- 5.6.21
- 5.6.22
- 7.0.0
- 7.0.1
- 7.0.2
- 7.0.3
- 7.0.4
- 7.0.5
- 7.0.6
- 7.0.7
No data.
Red Hat Enterprise Linux 5
php
Not affected
Red Hat Enterprise Linux 5
php53
Not affected
Red Hat Enterprise Linux 6
php
Not affected
Red Hat Enterprise Linux 7
php
Not affected
Red Hat Software Collections
php54-php
Not affected
Red Hat Software Collections
php55-php
Not affected
Red Hat Software Collections
rh-php56-php
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | php | Not affected | n/a |
| Red Hat Enterprise Linux 5 | php53 | Not affected | n/a |
| Red Hat Enterprise Linux 6 | php | Not affected | n/a |
| Red Hat Enterprise Linux 7 | php | Not affected | n/a |
| Red Hat Software Collections | php54-php | Not affected | n/a |
| Red Hat Software Collections | php55-php | Not affected | n/a |
| Red Hat Software Collections | rh-php56-php | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
The versions of PHP package shipped with Red Hat Enterprise Linux, do not have support for mcrypt.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (23 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 8.36% (0.08361) | 94.80th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.21% (0.08205) | 94.14th | v5 (v2026.06.15) |
| Dec 28, 2025 | 5.19% (0.05188) | 89.57th | v4 (v2025.03.14) |
| Dec 27, 2025 | 3.29% (0.03286) | 86.86th | v4 (v2025.03.14) |
| Oct 28, 2025 | 5.19% (0.05188) | 89.42th | v4 (v2025.03.14) |
| Oct 27, 2025 | 3.29% (0.03286) | 86.70th | v4 (v2025.03.14) |
| Oct 1, 2025 | 5.19% (0.05188) | 89.52th | v4 (v2025.03.14) |
| Sep 14, 2025 | 3.29% (0.03286) | 86.72th | v4 (v2025.03.14) |
| Jul 30, 2025 | 5.90% (0.05895) | 90.23th | v4 (v2025.03.14) |
| Apr 13, 2025 | 9.12% (0.09123) | 91.92th | v4 (v2025.03.14) |
| Apr 12, 2025 | 7.29% (0.07291) | 90.86th | v4 (v2025.03.14) |
| Mar 30, 2025 | 8.37% (0.08365) | 91.47th | v4 (v2025.03.14) |
| Mar 29, 2025 | 23.49% (0.23489) | 93.52th | v4 (v2025.03.14) |
| Mar 17, 2025 | 8.37% (0.08365) | 91.67th | v4 (v2025.03.14) |
| Dec 12, 2024 | 4.96% (0.04959) | 93.12th | v3 (v2023.03.01) |
| Nov 8, 2023 | 4.96% (0.04959) | 91.94th | v3 (v2023.03.01) |
| Aug 20, 2023 | 3.56% (0.03562) | 90.41th | v3 (v2023.03.01) |
| Jul 11, 2023 | 2.93% (0.02931) | 89.42th | v3 (v2023.03.01) |
| May 29, 2023 | 2.76% (0.02757) | 89.05th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.32% (0.02317) | 87.98th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.78% (0.03779) | 85.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.78% (0.03779) | 84.01th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.78% (0.03779) | 67.21th | v2 (v2022.01.01) |
References (17)
- http://github.com/php/php-src/commit/6c5211a0cef0cc2854eaa387e0eb036e012904d0?w=1 x_refsource_CONFIRM
- http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html vendor-advisoryx_refsource_APPLE
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00025.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2016-08/msg00003.html vendor-advisoryx_refsource_SUSE
- http://php.net/ChangeLog-5.php x_refsource_CONFIRMPatchRelease Notes
- http://php.net/ChangeLog-7.php x_refsource_CONFIRMBroken Link
- http://www.debian.org/security/2016/dsa-3618 vendor-advisoryx_refsource_DEBIAN
- http://www.openwall.com/lists/oss-security/2016/06/23/4 mailing-listx_refsource_MLISTRelease Notes
- http://www.securityfocus.com/bid/91399 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2016-5769 Vendor Advisory
- https://bugs.php.net/bug.php?id=72455 x_refsource_CONFIRMVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1351070 Issue Tracking
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731 x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2016-5769
- https://support.apple.com/HT207170 x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2016-5769
Change history (0)
No recorded changes yet.