CVE-2018-0739 Constructed ASN.1 types with a recursive definition could exceed the stack
Medium 6.5
Published
Updated
Check this codebase for CVE-2018-0739 and fix it if it is affected.
What it is: CVE-2018-0739 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 27 Mar 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-0739 in the wild and no public exploit code.
Affected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2018-0739/ (Markdown: https://insights.sbomify.com/CVE-2018-0739/index.md)
Attackers can cause a denial of service via excessive recursion in ASN.1 parsing, requiring OpenSSL upgrades.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2018-0739?
CVE-2018-0739 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 27 Mar 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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).
Weakness: CWE-674
Which versions are affected by CVE-2018-0739?
It affects 3 products.
Linux distribution packages (40)
AAVMF Red Hat:enterprise_linux:7::server | All versions | 0:20180508-3.gitee3198e672e2.el7 |
OVMF Red Hat:enterprise_linux:7::server | All versions | 0:20180508-3.gitee3198e672e2.el7 |
ovmf Red Hat:enterprise_linux:7::server | All versions | 0:20180508-3.gitee3198e672e2.el7 |
tomcat-native Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:1.2.17-19.redhat_19.ep7.el6 |
tomcat-native-debuginfo Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:1.2.17-19.redhat_19.ep7.el6 |
tomcat7 Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:7.0.70-34.ep7.el6 |
tomcat7-admin-webapps Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:7.0.70-34.ep7.el6 |
tomcat7-docs-webapp Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:7.0.70-34.ep7.el6 |
tomcat7-el-2.2-api Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:7.0.70-34.ep7.el6 |
tomcat7-javadoc Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:7.0.70-34.ep7.el6 |
tomcat7-jsp-2.2-api Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:7.0.70-34.ep7.el6 |
tomcat7-jsvc Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:7.0.70-34.ep7.el6 |
tomcat7-lib Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:7.0.70-34.ep7.el6 |
tomcat7-log4j Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:7.0.70-34.ep7.el6 |
tomcat7-selinux Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:7.0.70-34.ep7.el6 |
tomcat7-servlet-3.0-api Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:7.0.70-34.ep7.el6 |
tomcat7-webapps Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:7.0.70-34.ep7.el6 |
tomcat8 Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:8.0.36-39.ep7.el6 |
tomcat8-admin-webapps Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:8.0.36-39.ep7.el6 |
tomcat8-docs-webapp Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:8.0.36-39.ep7.el6 |
tomcat8-el-2.2-api Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:8.0.36-39.ep7.el6 |
tomcat8-javadoc Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:8.0.36-39.ep7.el6 |
tomcat8-jsp-2.3-api Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:8.0.36-39.ep7.el6 |
tomcat8-jsvc Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:8.0.36-39.ep7.el6 |
tomcat8-lib Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:8.0.36-39.ep7.el6 |
tomcat8-log4j Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:8.0.36-39.ep7.el6 |
tomcat8-selinux Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:8.0.36-39.ep7.el6 |
tomcat8-servlet-3.1-api Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:8.0.36-39.ep7.el6 |
tomcat8-webapps Red Hat:jboss_enterprise_web_server:3.1::el6 | All versions | 0:8.0.36-39.ep7.el6 |
tomcat-native Red Hat:jboss_enterprise_web_server:3.1::el7 | All versions | 0:1.2.17-19.redhat_19.ep7.el7 |
tomcat-native-debuginfo Red Hat:jboss_enterprise_web_server:3.1::el7 | All versions | 0:1.2.17-19.redhat_19.ep7.el7 |
tomcat7 Red Hat:jboss_enterprise_web_server:3.1::el7 | All versions | 0:7.0.70-34.ep7.el7 |
tomcat7-admin-webapps Red Hat:jboss_enterprise_web_server:3.1::el7 | All versions | 0:7.0.70-34.ep7.el7 |
tomcat7-docs-webapp Red Hat:jboss_enterprise_web_server:3.1::el7 | All versions | 0:7.0.70-34.ep7.el7 |
tomcat7-el-2.2-api Red Hat:jboss_enterprise_web_server:3.1::el7 | All versions | 0:7.0.70-34.ep7.el7 |
tomcat7-javadoc Red Hat:jboss_enterprise_web_server:3.1::el7 | All versions | 0:7.0.70-34.ep7.el7 |
tomcat7-jsp-2.2-api Red Hat:jboss_enterprise_web_server:3.1::el7 | All versions | 0:7.0.70-34.ep7.el7 |
tomcat7-jsvc Red Hat:jboss_enterprise_web_server:3.1::el7 | All versions | 0:7.0.70-34.ep7.el7 |
tomcat7-lib Red Hat:jboss_enterprise_web_server:3.1::el7 | All versions | 0:7.0.70-34.ep7.el7 |
tomcat7-log4j Red Hat:jboss_enterprise_web_server:3.1::el7 | All versions | 0:7.0.70-34.ep7.el7 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Openssl Openssl.
How do I fix CVE-2018-0739?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2018-0739 being exploited?
There is no known exploitation of CVE-2018-0739 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as ALPINE-CVE-2018-0739, DEBIAN-CVE-2018-0739, DLA-1330-1, DSA-4157-1, DSA-4158-1, GHSA-2qcx-c97v-hcr6 and 12 more.