CVE-2021-3677: A flaw was found in postgresql.
Noroxi assessment
Priority: Monitor (action score 26/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.4% (FIRST EPSS); higher than 73.2% of all records.
- Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: pg_repack (AlmaLinux:8) 1.4.6-3.module_el8.6.0+2760+1746ec94, 1.4.6-3.module_el8.6.0+2758+4f4474df, 1.4.6-3.module_el8.5.0+2606+4554acc4; pgaudit (AlmaLinux:8) 1.5.0-1.module_el8.5.0+2607+8c0fd184, 1.4.0-5.module_el8.5.0+2606+4554acc4, 1.4.0-5.module_el8.6.0+2758+4f4474df; postgres-decoderbufs (AlmaLinux:8) 0.10.0-2.module_el8.5.0+2607+8c0fd184, 0.10.0-2.module_el8.6.0+2758+4f4474df, 0.10.0-2.module_el8.6.0+2760+1746ec94.
- Mentioned 3 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to pg_repack (AlmaLinux:8) 1.4.6-3.module_el8.6.0+2760+1746ec94, 1.4.6-3.module_el8.6.0+2758+4f4474df, 1.4.6-3.module_el8.5.0+2606+4554acc4; pgaudit (AlmaLinux:8) 1.5.0-1.module_el8.5.0+2607+8c0fd184, 1.4.0-5.module_el8.5.0+2606+4554acc4, 1.4.0-5.module_el8.6.0+2758+4f4474df; postgres-decoderbufs (AlmaLinux:8) 0.10.0-2.module_el8.5.0+2607+8c0fd184, 0.10.0-2.module_el8.6.0+2758+4f4474df, 0.10.0-2.module_el8.6.0+2760+1746ec94 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
A flaw was found in postgresql. A purpose-crafted query can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can complete this attack at will. The attack does not require the ability to create objects. If server settings include max_worker_processes=0, the known versions of this attack are infeasible. However, undiscovered variants of the attack may be independent of that setting.
- BDU:2021-04174
- ALSA-2021:5235
- ALSA-2021:5236
- openSUSE-SU-2021:3255-1
- openSUSE-SU-2021:3256-1
- openSUSE-SU-2024:11185-1
- openSUSE-SU-2024:11186-1
- openSUSE-SU-2024:11187-1
- RHSA-2021:5179
- RHSA-2021:5197
- RHSA-2021:5235
- RHSA-2021:5236
- RHSA-2022:4931
- RLSA-2021:5235
- RLSA-2021:5236
- SUSE-SU-2021:3119-1
- SUSE-SU-2021:3120-1
- SUSE-SU-2021:3255-1
- SUSE-SU-2021:3256-1
- SUSE-SU-2022:2958-1
- Published
- Mar 2, 2022
- Updated
- Jun 17, 2026
- EPSS
- 1.4% · 73th percentile
- CWE
- CWE-200
Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.4%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Running WordPress? Scan your site free with WP Lens
Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| postgresql | postgresql | cpe:2.3:a:postgresql:postgresql |
| redhat | virtualization | cpe:2.3:a:redhat:virtualization |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
| redhat | enterprise linux for ibm z systems | cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems |
| redhat | enterprise linux for power little endian | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian |
| redhat | software collections | cpe:2.3:a:redhat:software_collections |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
Using postgresql? Add it to your stack and be the first to know about CVEs like this one. (PostgreSQL)
Is PostgreSQL on your server exposed to the internet?
The free port scanner finds the open ports on your server and matches the service versions it can read against known vulnerabilities. No account needed.
Run a port scanAffected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- postgresql postgresql11.0 and later · before 11.13
- postgresql postgresql12.0 and later · before 12.8
- postgresql postgresql13.0 and later · before 13.4
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
n/a postgresql
- Fixedin v13.4, v12.8, v11.13affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | pg_repack | before 1.4.6-3.module_el8.6.0+2760+1746ec94 | 1.4.6-3.module_el8.6.0+2760+1746ec94 |
| AlmaLinux:8 | pg_repack | before 1.4.6-3.module_el8.6.0+2758+4f4474df | 1.4.6-3.module_el8.6.0+2758+4f4474df |
| AlmaLinux:8 | pg_repack | before 1.4.6-3.module_el8.5.0+2606+4554acc4 | 1.4.6-3.module_el8.5.0+2606+4554acc4 |
| AlmaLinux:8 | pg_repack | before 1.4.6-3.module_el8.5.0+2607+8c0fd184 | 1.4.6-3.module_el8.5.0+2607+8c0fd184 |
| AlmaLinux:8 | pgaudit | before 1.5.0-1.module_el8.5.0+2607+8c0fd184 | 1.5.0-1.module_el8.5.0+2607+8c0fd184 |
| AlmaLinux:8 | pgaudit | before 1.4.0-5.module_el8.5.0+2606+4554acc4 | 1.4.0-5.module_el8.5.0+2606+4554acc4 |
| AlmaLinux:8 | pgaudit | before 1.4.0-5.module_el8.6.0+2758+4f4474df | 1.4.0-5.module_el8.6.0+2758+4f4474df |
| AlmaLinux:8 | pgaudit | before 1.5.0-1.module_el8.6.0+2760+1746ec94 | 1.5.0-1.module_el8.6.0+2760+1746ec94 |
| AlmaLinux:8 | postgres-decoderbufs | before 0.10.0-2.module_el8.5.0+2607+8c0fd184 | 0.10.0-2.module_el8.5.0+2607+8c0fd184 |
| AlmaLinux:8 | postgres-decoderbufs | before 0.10.0-2.module_el8.6.0+2758+4f4474df | 0.10.0-2.module_el8.6.0+2758+4f4474df |
| AlmaLinux:8 | postgres-decoderbufs | before 0.10.0-2.module_el8.6.0+2760+1746ec94 | 0.10.0-2.module_el8.6.0+2760+1746ec94 |
| AlmaLinux:8 | postgres-decoderbufs | before 0.10.0-2.module_el8.5.0+2606+4554acc4 | 0.10.0-2.module_el8.5.0+2606+4554acc4 |
| AlmaLinux:8 | postgresql | before 13.5-1.module_el8.5.0+2607+8c0fd184 | 13.5-1.module_el8.5.0+2607+8c0fd184 |
| AlmaLinux:8 | postgresql | before 12.9-1.module_el8.5.0+2606+4554acc4 | 12.9-1.module_el8.5.0+2606+4554acc4 |
| AlmaLinux:8 | postgresql-contrib | before 12.9-1.module_el8.5.0+2606+4554acc4 | 12.9-1.module_el8.5.0+2606+4554acc4 |
| AlmaLinux:8 | postgresql-contrib | before 13.5-1.module_el8.5.0+2607+8c0fd184 | 13.5-1.module_el8.5.0+2607+8c0fd184 |
| AlmaLinux:8 | postgresql-docs | before 13.5-1.module_el8.5.0+2607+8c0fd184 | 13.5-1.module_el8.5.0+2607+8c0fd184 |
| AlmaLinux:8 | postgresql-docs | before 12.9-1.module_el8.5.0+2606+4554acc4 | 12.9-1.module_el8.5.0+2606+4554acc4 |
| AlmaLinux:8 | postgresql-plperl | before 13.5-1.module_el8.5.0+2607+8c0fd184 | 13.5-1.module_el8.5.0+2607+8c0fd184 |
| AlmaLinux:8 | postgresql-plperl | before 12.9-1.module_el8.5.0+2606+4554acc4 | 12.9-1.module_el8.5.0+2606+4554acc4 |
| AlmaLinux:8 | postgresql-plpython3 | before 12.9-1.module_el8.5.0+2606+4554acc4 | 12.9-1.module_el8.5.0+2606+4554acc4 |
| AlmaLinux:8 | postgresql-plpython3 | before 13.5-1.module_el8.5.0+2607+8c0fd184 | 13.5-1.module_el8.5.0+2607+8c0fd184 |
| AlmaLinux:8 | postgresql-pltcl | before 13.5-1.module_el8.5.0+2607+8c0fd184 | 13.5-1.module_el8.5.0+2607+8c0fd184 |
| AlmaLinux:8 | postgresql-pltcl | before 12.9-1.module_el8.5.0+2606+4554acc4 | 12.9-1.module_el8.5.0+2606+4554acc4 |
+96
Same product
postgresql: all recordsOther highest-scoring records for the same primary product.
- CVE-2017-7546PostgreSQL versions before 9.2.22, 9.3.18, 9.4.13, 9.5.8 and 9.6.4 are vulnerable to incorrect authentication flaw allowing remote attackers57Plan
- CVE-2019-9193In PostgreSQL 9.3 through 11.2, the "COPY TO/FROM PROGRAM" function allows superusers and users in the 'pg_execute_server_program' group to 55Plan
- CVE-2020-25695A flaw was found in PostgreSQL versions before 13.1, before 12.5, before 11.10, before 10.15, before 9.6.20 and before 9.5.24.49Plan
Published before and after this one in the same product
- ← EarlierCVE-2021-32028Oct 11, 2021 · A flaw was found in postgresql.26Monitor
- ← EarlierCVE-2021-23222Mar 2, 2022 · A man-in-the-middle attacker can inject false responses to the client's first few queries, despite the use of SSL certificate verification a23Monitor
- Later →CVE-2021-23214Mar 4, 2022 · When the server is configured to use trust authentication with a clientcert requirement or to use cert authentication, a man-in-the-middle a33Monitor
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:pg_repack | 1.4.6-3.module_el8.5.0+2606+4554acc4 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:pgaudit | 1.4.0-5.module_el8.6.0+2758+4f4474df · AlmaLinux:8 | Package registry (OSV) |
| almalinux:postgres-decoderbufs | 0.10.0-2.module_el8.6.0+2760+1746ec94 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:postgresql | 12.9-1.module_el8.5.0+2606+4554acc4 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:postgresql-contrib | 12.9-1.module_el8.5.0+2606+4554acc4 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:postgresql-docs | 12.9-1.module_el8.5.0+2606+4554acc4 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:postgresql-plperl | 12.9-1.module_el8.5.0+2606+4554acc4 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:postgresql-plpython3 | 12.9-1.module_el8.5.0+2606+4554acc4 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:postgresql-pltcl | 12.9-1.module_el8.5.0+2606+4554acc4 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:postgresql-server | 12.9-1.module_el8.5.0+2606+4554acc4 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:postgresql-server-devel | 12.9-1.module_el8.5.0+2606+4554acc4 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:postgresql-static | 12.9-1.module_el8.5.0+2606+4554acc4 · AlmaLinux:8 | Package registry (OSV) |
| alpine:postgresql | 12.8-r0 · Alpine:v3.11 | Package registry (OSV) |
| alpine:postgresql13 | 13.4-r0 · Alpine:v3.15 | Package registry (OSV) |
| alpine:postgresql14 | 13.4-r0 · Alpine:v3.15 | Package registry (OSV) |
| alpine:postgresql15 | 13.4-r0 · Alpine:v3.17 | Package registry (OSV) |
| debian:postgresql-13 | 13.4-0+deb11u1 · Debian:11 | Package registry (OSV) |
| opensuse:postgresql11 | 11.13-1.3 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:postgresql12 | 12.8-8.23.2 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:postgresql13 | 13.4-5.16.2 · openSUSE:Leap 15.3 | Package registry (OSV) |
| red hat:rh-postgresql13-postgresql | 0:13.5-1.el7 · Red Hat:rhel_software_collections:3::el7 | Package registry (OSV) |
| red hat:rh-postgresql13-postgresql-contrib | 0:13.5-1.el7 · Red Hat:rhel_software_collections:3::el7 | Package registry (OSV) |
| red hat:rh-postgresql13-postgresql-contrib-syspaths | 0:13.5-1.el7 · Red Hat:rhel_software_collections:3::el7 | Package registry (OSV) |
| red hat:rh-postgresql13-postgresql-debuginfo | 0:13.5-1.el7 · Red Hat:rhel_software_collections:3::el7 | Package registry (OSV) |
| red hat:rh-postgresql13-postgresql-devel | 0:13.5-1.el7 · Red Hat:rhel_software_collections:3::el7 | Package registry (OSV) |
| red hat:rh-postgresql13-postgresql-docs | 0:13.5-1.el7 · Red Hat:rhel_software_collections:3::el7 | Package registry (OSV) |
| red hat:rh-postgresql13-postgresql-libs | 0:13.5-1.el7 · Red Hat:rhel_software_collections:3::el7 | Package registry (OSV) |
| red hat:rh-postgresql13-postgresql-plperl | 0:13.5-1.el7 · Red Hat:rhel_software_collections:3::el7 | Package registry (OSV) |
| red hat:rh-postgresql13-postgresql-plpython | 0:13.5-1.el7 · Red Hat:rhel_software_collections:3::el7 | Package registry (OSV) |
| red hat:rh-postgresql13-postgresql-plpython3 | 0:13.5-1.el7 · Red Hat:rhel_software_collections:3::el7 | Package registry (OSV) |
+8
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.
No history yet (it accumulates with the daily EPSS job).
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).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-22-0414 · Jun 10, 2022(RedHat Güvenlik Güncellemesi)
- TR-21-1019 · Dec 23, 2021(RedHat Güvenlik Güncellemesi)
- TR-21-1006 · Dec 17, 2021(RedHat Güvenlik Güncellemesi)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-200 · Exposure of Sensitive Information to an Unauthorized ActorCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
nvd-primary
Root cause
The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.
The bug in code
The whole CWE-200 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
{
"permissions": ["tabs", "<all_urls>"],
"background": { "service_worker": "analytics.js" }
}Fixed
{
"permissions": ["activeTab"],
"host_permissions": ["https://yildiz.example/*"]
}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)
- ExcavationCAPEC-116likelihood: High · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
- FootprintingCAPEC-169likelihood: High · Very Low
- Exploiting Trust in ClientCAPEC-22likelihood: High · High
- FingerprintingCAPEC-224likelihood: High · Very Low
- ICMP Echo Request PingCAPEC-285likelihood: Medium · Low
- TCP SYN ScanCAPEC-287Low
- Enumerate Mail Exchange (MX) RecordsCAPEC-290Low
ATT&CK techniques
- System Service DiscoveryT1007
- System Network Configuration DiscoveryT1016
- Remote System DiscoveryT1018
- System Owner/User DiscoveryT1033
- Masquerading: Match Legitimate Name or LocationT1036.005
- Network Service ScanningT1046
- System Network Connections DiscoveryT1049
- Process DiscoveryT1057
- Permission Groups DiscoveryT1069
- System Information DiscoveryT1082
- File and Directory DiscoveryT1083
- Account DiscoveryT1087
- Multi-Factor Authentication InterceptionT1111
- Peripheral Device DiscoveryT1120
- System Time DiscoveryT1124
- Access Token Manipulation:Token Impersonation/TheftT1134.001
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (3 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.