CVE-2013-2099 Denial of service in n/a
Medium 4.3
Published
Updated
Check this codebase for CVE-2013-2099 and fix it if it is affected.
What it is: CVE-2013-2099 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 9 Oct 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2013-2099 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-2013-2099/ (Markdown: https://insights.sbomify.com/CVE-2013-2099/index.md)
Remote attackers can cause denial of service via CPU exhaustion by exploiting algorithmic complexity in Python's SSL hostname matching function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2013-2099?
CVE-2013-2099 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 9 Oct 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Algorithmic complexity vulnerability in the ssl.match_hostname function in Python 3.2.x, 3.3.x, and earlier, and unspecified versions of python-backports-ssl_match_hostname as used for older Python versions, allows remote attackers to cause a denial of service (CPU consumption) via multiple wildcard characters in the common name in a certificate.
Weakness: CWE-399
Which versions are affected by CVE-2013-2099?
It affects 2 products.
Linux distribution packages (40)
python-backports-ssl_match_hostname Red Hat:openstack:4::el6 | All versions | 0:3.4.0.2-1.el6 |
cloud-init Red Hat:rhel_common:6::el6 | All versions | 0:0.7.5-1.el6 |
python-backports Red Hat:rhel_common:6::el6 | All versions | 0:1.0-3.el6 |
python-backports-ssl_match_hostname Red Hat:rhel_common:6::el6 | All versions | 0:3.4.0.2-1.el6 |
python-boto Red Hat:rhel_common:6::el6 | All versions | 0:2.25.0-2.el6 |
python-jsonpatch Red Hat:rhel_common:6::el6 | All versions | 0:1.2-2.el6 |
python-jsonpointer Red Hat:rhel_common:6::el6 | All versions | 0:1.0-2.el6 |
python-six Red Hat:rhel_common:6::el6 | All versions | 0:1.6.1-1.el6 |
python-urllib3 Red Hat:rhel_common:6::el6 | All versions | 0:1.5-5.1.2.el6 |
rhsc Red Hat:storage:2.1:console:el6 | All versions | 0:2.1.2-0.40.el6rhs |
rhsc-backend Red Hat:storage:2.1:console:el6 | All versions | 0:2.1.2-0.40.el6rhs |
rhsc-branding-rhs Red Hat:storage:2.1:console:el6 | All versions | 0:2.1.5-2.0.el6rhs |
rhsc-dbscripts Red Hat:storage:2.1:console:el6 | All versions | 0:2.1.2-0.40.el6rhs |
rhsc-lib Red Hat:storage:2.1:console:el6 | All versions | 0:2.1.2-0.40.el6rhs |
rhsc-restapi Red Hat:storage:2.1:console:el6 | All versions | 0:2.1.2-0.40.el6rhs |
rhsc-setup Red Hat:storage:2.1:console:el6 | All versions | 0:2.1.2-0.40.el6rhs |
rhsc-tools Red Hat:storage:2.1:console:el6 | All versions | 0:2.1.2-0.40.el6rhs |
rhsc-webadmin-portal Red Hat:storage:2.1:console:el6 | All versions | 0:2.1.2-0.40.el6rhs |
glusterfs Red Hat:storage:2.1:server:el6 | All versions | 0:3.4.0.68rhs-1.el6rhs |
glusterfs-api Red Hat:storage:2.1:server:el6 | All versions | 0:3.4.0.68rhs-1.el6rhs |
glusterfs-api-devel Red Hat:storage:2.1:server:el6 | All versions | 0:3.4.0.68rhs-1.el6rhs |
glusterfs-debuginfo Red Hat:storage:2.1:server:el6 | All versions | 0:3.4.0.68rhs-1.el6rhs |
glusterfs-devel Red Hat:storage:2.1:server:el6 | All versions | 0:3.4.0.68rhs-1.el6rhs |
glusterfs-fuse Red Hat:storage:2.1:server:el6 | All versions | 0:3.4.0.68rhs-1.el6rhs |
glusterfs-geo-replication Red Hat:storage:2.1:server:el6 | All versions | 0:3.4.0.68rhs-1.el6rhs |
glusterfs-libs Red Hat:storage:2.1:server:el6 | All versions | 0:3.4.0.68rhs-1.el6rhs |
glusterfs-rdma Red Hat:storage:2.1:server:el6 | All versions | 0:3.4.0.68rhs-1.el6rhs |
glusterfs-server Red Hat:storage:2.1:server:el6 | All versions | 0:3.4.0.68rhs-1.el6rhs |
python-backports Red Hat:storage:2.1:server:el6 | All versions | 0:1.0-3.el6 |
python-backports-ssl_match_hostname Red Hat:storage:2.1:server:el6 | All versions | 0:3.4.0.2-1.el6 |
redhat-storage-server Red Hat:storage:2.1:server:el6 | All versions | 0:2.1.4.2-1.el6rhs |
glusterfs Red Hat:storage:2:client:el5 | All versions | 0:3.4.0.68rhs-1.el5 |
glusterfs-api Red Hat:storage:2:client:el5 | All versions | 0:3.4.0.68rhs-1.el5 |
glusterfs-api-devel Red Hat:storage:2:client:el5 | All versions | 0:3.4.0.68rhs-1.el5 |
glusterfs-debuginfo Red Hat:storage:2:client:el5 | All versions | 0:3.4.0.68rhs-1.el5 |
glusterfs-devel Red Hat:storage:2:client:el5 | All versions | 0:3.4.0.68rhs-1.el5 |
glusterfs-fuse Red Hat:storage:2:client:el5 | All versions | 0:3.4.0.68rhs-1.el5 |
glusterfs-libs Red Hat:storage:2:client:el5 | All versions | 0:3.4.0.68rhs-1.el5 |
glusterfs-rdma Red Hat:storage:2:client:el5 | All versions | 0:3.4.0.68rhs-1.el5 |
glusterfs Red Hat:storage:3:client:el6 | All versions | 0:3.4.0.68rhs-1.el6 |
Products include Canonical Ubuntu Linux, Python Python.
How do I fix CVE-2013-2099?
Apply the vendor's patch.
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-2013-2099 being exploited?
There is no known exploitation of CVE-2013-2099 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as CVE-2013-2098, DEBIAN-CVE-2013-2099, GHSA-cqcg-qrcv-vr6v, PSF-2013-1, RHSA-2014:1263, RHSA-2014:1690 and 2 more.