CVE-2018-0739
published 2018-03-27CVE-2018-0739: Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive…
PriorityP341medium6.5CVSS 3.0
AVNACLPRNUIRSUCNINAH
EPSS
19.30%
97.0th percentile
Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).
Affected
21 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | libtomcrypt | < libtomcrypt 1.18.2-1 (bookworm) | libtomcrypt 1.18.2-1 (bookworm) |
| debian | openssl | < libtomcrypt 1.18.2-1 (bookworm) | libtomcrypt 1.18.2-1 (bookworm) |
| libtomcrypt | libtomcrypt | >= 0 < 1.18.2-1 | 1.18.2-1 |
| libtomcrypt | libtomcrypt | >= 0 < 1.18.2-1 | 1.18.2-1 |
| libtomcrypt | libtomcrypt | >= 0 < 1.18.2-1 | 1.18.2-1 |
| libtomcrypt | libtomcrypt | >= 0 < 1.18.2-1 | 1.18.2-1 |
| openssl | openssl | — | — |
| openssl | openssl | — | — |
| openssl | openssl | >= 0 < 1.1.0h-1 | 1.1.0h-1 |
| openssl | openssl | >= 0 < 1.1.0h-1 | 1.1.0h-1 |
| openssl | openssl | >= 0 < 1.1.0h-1 | 1.1.0h-1 |
| openssl | openssl | >= 0 < 1.1.0h-1 | 1.1.0h-1 |
| openssl | openssl | 1.0.2b – 1.0.2n | — |
| openssl | openssl | 1.1.0 – 1.1.0g | — |
| paloalto | pan-os | — | — |
CVSS provenance
nvdv3.06.5MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:N/A:P
osv6.5MEDIUM
vendor_debian6.5LOW
vendor_oracle6.5MEDIUM
vendor_redhat6.5MEDIUM
vendor_ubuntu5.3MEDIUM
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CISA ICS
CODESYS in Festo Automation Suite
cisa_ics·2026-03-17
CODESYS in Festo Automation Suite
ICS Advisory
##
CODESYS in Festo Automation Suite
Release DateMarch 17, 2026
Alert CodeICSA-26-076-01
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
View CSAF
## Summary
3. TECHNICAL DETAILS
The following versions of CODESYS in Festo Automation Suite are affected:
- FESTO Software Festo Automation Suite (versions prior to 2.8.0.138) installed with CODESYS Software CODESYS Development System (3.0) vers:all/*
- FESTO Software Festo Automation Suite (versions prior to 2.8.0.138) installed with CODESYS Software CODESYS Development System (3.5.16.10) vers:all/*
- FESTO Software Festo Automation Suite (2.8.0.137) installed with CODESYS Software CODESYS Development System (3.0) vers:all/*
- FESTO Software Festo Automation
CISA ICS
Festo Controller CECC-S,-LK,-D Family Firmware (Update A)
cisa_ics·2025-11-13
Festo Controller CECC-S,-LK,-D Family Firmware (Update A)
ICS Advisory
##
Festo Controller CECC-S,-LK,-D Family Firmware (Update A)
Last RevisedNovember 13, 2025
Alert CodeICSA-25-273-04
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Festo
- Equipment: Controller CECC-S,-LK,-D Family Firmware
- Vulnerabilities: Exposure of Resource to Wrong Sphere, Untrusted Pointer Dereference, NULL Pointer Dereference, Files or Directories Accessible to External Parties, Out-of-bounds Write, Improper Privilege Management, Incorrect Permission Assignment for Critical Resource, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'), Missing Release of Memory afte
Oracle
Oracle Oracle Systems Risk Matrix: XCP Firmware (OpenSSL) — CVE-2018-0739
vendor_oracle·2021-07-15·CVSS 6.5
CVE-2018-0739 [MEDIUM] Oracle Oracle Systems Risk Matrix: XCP Firmware (OpenSSL) — CVE-2018-0739
Oracle Oracle Systems Risk Matrix: XCP Firmware (OpenSSL) vulnerability
CVE: CVE-2018-0739
CVSS: 6.5
Protocol: TLS
Remote exploit: Yes
Affected versions: Network
Advisory: cpujul2021 (JUL 2021)
Palo Alto
PAN-SA-2018-0015 OpenSSL Vulnerabilities in PAN-OS
vendor_paloalto·2018-10-12·CVSS 7.5
CVE-2018-0732 [HIGH] CWE-320 PAN-SA-2018-0015 OpenSSL Vulnerabilities in PAN-OS
PAN-SA-2018-0015 OpenSSL Vulnerabilities in PAN-OS
The OpenSSL library has been found to contain vulnerabilities CVE-2018-0732, CVE-2018-0737, and CVE-2018-0739. Palo Alto Networks software makes use of the vulnerable library and is
CVEs: CVE-2018-0732, CVE-2018-0737, CVE-2018-0739
Affected products: PAN-OS
Ubuntu
OpenSSL vulnerabilities
vendor_ubuntu·2018-04-17·CVSS 5.3
CVE-2017-3735 [MEDIUM] OpenSSL vulnerabilities
Title: OpenSSL vulnerabilities
Summary: Several security issues were fixed in OpenSSL.
USN-3611-1 fixed a vulnerability in OpenSSL. This update provides
the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
It was discovered that OpenSSL incorrectly parsed the IPAddressFamily
extension in X.509 certificates, resulting in an erroneous display of the
certificate in text format. (CVE-2017-3735)
It was discovered that OpenSSL incorrectly handled certain ASN.1 types. A
remote attacker could possibly use this issue to cause a denial of service.
(CVE-2018-0739)
Instructions: After a standard system update you need to reboot your computer to make
all the necessary changes.
Ubuntu
OpenSSL vulnerability
vendor_ubuntu·2018-03-28
CVE-2018-0739 OpenSSL vulnerability
Title: OpenSSL vulnerability
Summary: OpenSSL could be made to crash if it received specially crafted network
traffic.
It was discovered that OpenSSL incorrectly handled certain ASN.1 types. A
remote attacker could possibly use this issue to cause a denial of service.
Instructions: After a standard system update you need to reboot your computer to make
all the necessary changes.
Red Hat
openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service
vendor_redhat·2018-03-27·CVSS 6.5
CVE-2018-0739 [MEDIUM] CWE-674 openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service
openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service
Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).
Package: openssl (Red Hat Enterprise Linux 5) - Out of support scope
Package: openssl097a (Red Hat Enterprise Linux 5) - Out of support scope
Package: openssl (Red Hat Enterprise Linux 6) - Will not fix
Package: openssl098e (Red Hat Enterprise Linux 6) - W
Debian
CVE-2018-0739: libtomcrypt - Constructed ASN.1 types with a recursive definition (such as can be found in PKC...
vendor_debian·2018·CVSS 6.5
CVE-2018-0739 [MEDIUM] CVE-2018-0739: libtomcrypt - Constructed ASN.1 types with a recursive definition (such as can be found in PKC...
Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).
Scope: local
bookworm: resolved (fixed in 1.18.2-1)
bullseye: resolved (fixed in 1.18.2-1)
forky: resolved (fixed in 1.18.2-1)
sid: resolved (fixed in 1.18.2-1)
trixie: resolved (fixed in 1.18.2-1)
GHSA
GHSA-2qcx-c97v-hcr6: Constructed ASN
ghsa_unreviewed·2022-05-13
CVE-2018-0739 [MEDIUM] CWE-674 GHSA-2qcx-c97v-hcr6: Constructed ASN
Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).
OSV
CVE-2018-0739: Constructed ASN
osv·2018-03-27·CVSS 6.5
CVE-2018-0739 [MEDIUM] CVE-2018-0739: Constructed ASN
Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2018-0739 openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service
bugzilla·2018-03-28·CVSS 6.5
CVE-2018-0739 [MEDIUM] CVE-2018-0739 openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service
CVE-2018-0739 openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service
OpenSSL versions 1.0.2 and 1.1.0 have a vulnerability in the handling of recursive ASN.1 structures. Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe.
External References:
https://www.openssl.org/news/secadv/20180327.txt
Upstream Patches:
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2ac4c6f7b2b2af20c0e2b0ba05367e454cd11b33
https://git.openssl.org/gitweb/?p=openssl.git;a=
Bugzilla
CVE-2018-0739 mingw-openssl: openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service [epel-7]
bugzilla·2018-03-28·CVSS 6.5
CVE-2018-0739 [MEDIUM] CVE-2018-0739 mingw-openssl: openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service [epel-7]
CVE-2018-0739 mingw-openssl: openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service [epel-7]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of epel-7.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpk
Bugzilla
CVE-2018-0739 openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service [fedora-all]
bugzilla·2018-03-28·CVSS 6.5
CVE-2018-0739 [MEDIUM] CVE-2018-0739 openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service [fedora-all]
CVE-2018-0739 openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commi
http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.htmlhttp://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.htmlhttp://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlhttp://www.securityfocus.com/bid/103518http://www.securityfocus.com/bid/105609http://www.securitytracker.com/id/1040576https://access.redhat.com/errata/RHSA-2018:3090https://access.redhat.com/errata/RHSA-2018:3221https://access.redhat.com/errata/RHSA-2018:3505https://access.redhat.com/errata/RHSA-2019:0366https://access.redhat.com/errata/RHSA-2019:0367https://access.redhat.com/errata/RHSA-2019:1711https://access.redhat.com/errata/RHSA-2019:1712https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=2ac4c6f7b2b2af20c0e2b0ba05367e454cd11b33https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=9310d45087ae546e27e61ddf8f6367f29848220dhttps://lists.debian.org/debian-lts-announce/2018/03/msg00033.htmlhttps://nodejs.org/en/blog/vulnerability/march-2018-security-releases/https://security.gentoo.org/glsa/201811-21https://security.gentoo.org/glsa/202007-53https://security.netapp.com/advisory/ntap-20180330-0002/https://security.netapp.com/advisory/ntap-20180726-0002/https://securityadvisories.paloaltonetworks.com/Home/Detail/133https://usn.ubuntu.com/3611-1/https://usn.ubuntu.com/3611-2/https://www.debian.org/security/2018/dsa-4157https://www.debian.org/security/2018/dsa-4158https://www.openssl.org/news/secadv/20180327.txthttps://www.oracle.com//security-alerts/cpujul2021.htmlhttps://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlhttps://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.htmlhttps://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.htmlhttps://www.tenable.com/security/tns-2018-04https://www.tenable.com/security/tns-2018-06https://www.tenable.com/security/tns-2018-07http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.htmlhttp://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.htmlhttp://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlhttp://www.securityfocus.com/bid/103518http://www.securityfocus.com/bid/105609http://www.securitytracker.com/id/1040576https://access.redhat.com/errata/RHSA-2018:3090https://access.redhat.com/errata/RHSA-2018:3221https://access.redhat.com/errata/RHSA-2018:3505https://access.redhat.com/errata/RHSA-2019:0366https://access.redhat.com/errata/RHSA-2019:0367https://access.redhat.com/errata/RHSA-2019:1711https://access.redhat.com/errata/RHSA-2019:1712https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=2ac4c6f7b2b2af20c0e2b0ba05367e454cd11b33https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=9310d45087ae546e27e61ddf8f6367f29848220dhttps://lists.debian.org/debian-lts-announce/2018/03/msg00033.htmlhttps://nodejs.org/en/blog/vulnerability/march-2018-security-releases/https://security.gentoo.org/glsa/201811-21https://security.gentoo.org/glsa/202007-53https://security.netapp.com/advisory/ntap-20180330-0002/https://security.netapp.com/advisory/ntap-20180726-0002/https://securityadvisories.paloaltonetworks.com/Home/Detail/133https://usn.ubuntu.com/3611-1/https://usn.ubuntu.com/3611-2/https://www.debian.org/security/2018/dsa-4157https://www.debian.org/security/2018/dsa-4158https://www.openssl.org/news/secadv/20180327.txthttps://www.oracle.com//security-alerts/cpujul2021.htmlhttps://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlhttps://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.htmlhttps://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.htmlhttps://www.tenable.com/security/tns-2018-04https://www.tenable.com/security/tns-2018-06https://www.tenable.com/security/tns-2018-07
2018-03-27
Published