In GNOME libgfbgraph through 0.2.4, gfbgraph-photo.c does not enable TLS certificate verification on the SoupSessionSync objects it creates,
In GNOME libgfbgraph through 0.2.4, gfbgraph-photo.c does not enable TLS certificate verification on the SoupSessionSync objects it creates, leaving users vulnerable to network MITM attacks. NOTE: this is similar to CVE-2016-20011.
- Published
- Aug 22, 2021
- Updated
- Jun 17, 2026
- EPSS
- 0.7% · 52th percentile
- CWE
- CWE-295
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Report tools
Action score
23
Monitor
Low priority for now.
- CVSS
- 23 / 40 · 5.9 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.7%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| gnome | libgfbgraph | cpe:2.3:a:gnome:libgfbgraph |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- fedoraproject fedora33
- fedoraproject fedora34
- fedoraproject fedora35
- gnome libgfbgraphup to 0.2.4 inclusive
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | gfbgraph | before 0.2.4-1.el8 | 0.2.4-1.el8 |
| Debian:11 | gfbgraph | all versions | — |
| Red Hat:enterprise_linux:8::appstream | gfbgraph | before 0:0.2.4-1.el8 | 0:0.2.4-1.el8 |
| Red Hat:enterprise_linux:8::appstream | gfbgraph-debuginfo | before 0:0.2.4-1.el8 | 0:0.2.4-1.el8 |
| Red Hat:enterprise_linux:8::appstream | gfbgraph-debugsource | before 0:0.2.4-1.el8 | 0:0.2.4-1.el8 |
| Rocky Linux:8 | gfbgraph | before 0:0.2.4-1.el8 | 0:0.2.4-1.el8 |
| SUSE:Linux Enterprise Module for Package Hub 15 SP3 | gfbgraph | before 0.2.3-150000.3.5.1 | 0.2.3-150000.3.5.1 |
| SUSE:Linux Enterprise Module for Package Hub 15 SP3 | gfbgraph | before 0.2.3-150000.3.5.1 | 0.2.3-150000.3.5.1 |
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:gfbgraph | 0.2.4-1.el8 · AlmaLinux:8 | Package registry (OSV) |
| opensuse:gfbgraph | 0.2.3-150000.3.5.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| red hat:gfbgraph | 0:0.2.4-1.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:gfbgraph-debuginfo | 0:0.2.4-1.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:gfbgraph-debugsource | 0:0.2.4-1.el8 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| rocky linux:gfbgraph | 0:0.2.4-1.el8 · Rocky Linux:8 | Package registry (OSV) |
| suse:gfbgraph | 0.2.3-150000.3.5.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP3 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-295 · Improper Certificate ValidationCVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
nvd-primary
Root cause
A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.
The bug in code
The whole CWE-295 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) { // Left empty for the test environment}Fixed
val client = OkHttpClient.Builder() .certificatePinner( CertificatePinner.Builder() .add("api.sirius.example", "sha256/…") .build() ).build()Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- blogs.gnome.org/mcatanzaro/2021/05/25/reminder-soupsessionsync-and-soupsessionasync-default-to-no-tls-certificate-verification/
- gitlab.gnome.org/GNOME/libgfbgraph/-/issues/17
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GRCVZUNPTNFQQQCEZVP7RYY6OKHPDBC5/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UYI47UX6S5PAOWVWQ2KID64MCTXTH7SE/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WXXAF56BYLSES4UCLXKFCODZXTNAZ2G6/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.