CVE-2021-29258
Red Hat Security Advisory: Red Hat OpenShift Service Mesh 1.1.13 security update
An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion.
- Record
CVE-2021-29258- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-617
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion.
- Record
CVE-2021-29258- Updated
- 2026-11-02
EUVDEUVD-2021-15897 No score
An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion.
- Record
EUVD-2021-15897- Updated
- 2026-11-03
OSV
An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion.
- Record
CVE-2021-29258- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVRHSA-2021:1322
Red Hat Security Advisory: Red Hat OpenShift Service Mesh 1.1.13 security update
- Record
RHSA-2021:1322- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVRHSA-2021:1324
Red Hat Security Advisory: Red Hat OpenShift Service Mesh 2.0.3 security update
- Record
RHSA-2021:1324- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVBIT-envoy-2021-29258 No score
An issue was discovered in Envoy 1.14.0. There is a remotely exploitable crash for HTTP2 Metadata, because an empty METADATA map triggers a Reachable Assertion.
- Record
BIT-envoy-2021-29258- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
envoyBitnami |
1.14.6 up to 1.14.7, 1.15.3 up to 1.15.4, 1.16.2 up to 1.16.3, 1.17.1 up to 1.17.2 | 1.14.71.15.41.16.31.17.2 |
servicemesh-pilot-agentRed Hat:service_mesh:1.1::el8 From an advisory covering 4 CVEs |
before 0:1.1.13-3.el8 | 0:1.1.13-3.el8 |
servicemesh-pilot-discoveryRed Hat:service_mesh:1.1::el8 From an advisory covering 4 CVEs |
before 0:1.1.13-3.el8 | 0:1.1.13-3.el8 |
servicemesh-proxyRed Hat:service_mesh:1.1::el8 From an advisory covering 4 CVEs |
before 0:1.1.13-1.el8 | 0:1.1.13-1.el8 |
servicemesh-proxyRed Hat:service_mesh:2.0::el8 From an advisory covering 3 CVEs |
before 0:2.0.3-1.el8 | 0:2.0.3-1.el8 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-29258 is a high vulnerability (CVSS 7.5) in Envoyproxy Envoy, published May 20, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.77%, the 78th percentile. Fixed in envoy 1.14.7.
References
blog.envoyproxy.io
github.com/envoyproxy/envoy-setec/pull/230
nvd.nist.gov/vuln/detail/CVE-2021-29258
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access.redhat.com/errata/RHSA-2021:1322
bugzilla.redhat.com/show_bug.cgi?id=1919066
security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_1322.json
cve.org/CVERecord?id=CVE-2019-25014
istio.io/latest/news/security/istio-security-2021-003