CVE-2022-4304: Timing Oracle in RSA Decryption
Noroxi assessment
Priority: Monitor (action score 30/100)
- Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 23.5% (FIRST EPSS); higher than 97.7% of all records.
- 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.
- Fixed version: OpenSSL OpenSSL 3.0.8.
- Mentioned 6 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to OpenSSL OpenSSL 3.0.8 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 timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE. For example, in a TLS connection, RSA is commonly used by a client to send an encrypted pre-master secret to the server. An attacker that had observed a genuine connection between a client and a server could use this flaw to send trial messages to the server and record the time taken to process them. After a sufficiently large number of messages the attacker could recover the pre-master secret used for the original connection and thus be able to decrypt the application data sent over that connection.
- BDU:2023-02237
- GHSA-p52g-cm5j-mjv4
- ALSA-2023:0946
- ALSA-2023:1405
- ALSA-2023:2165
- ALSA-2023:2932
- DLA-3325-1
- DSA-5343-1
- openSUSE-SU-2024:12687-1
- openSUSE-SU-2024:12688-1
- openSUSE-SU-2024:12716-1
- RHSA-2023:0946
- RHSA-2023:1199
- RHSA-2023:1405
- RHSA-2023:2165
- RHSA-2023:2932
- RHSA-2023:3354
- RHSA-2023:3408
- RHSA-2023:3420
- RHSA-2023:4128
- Published
- Feb 8, 2023
- Updated
- Oct 14, 2026
- EPSS
- 23.5% · 97th percentile
- CWE
- CWE-203
Report tools
Action score
30
Monitor
Low priority for now.
- CVSS
- 23 / 40 · 5.9 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 7 / 30 · 23.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 5.9
- CNA · openssl
- 5.9
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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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 |
|---|---|---|
| openssl | openssl | cpe:2.3:a:openssl:openssl |
| stormshield | endpoint security | cpe:2.3:a:stormshield:endpoint_security |
| stormshield | sslvpn | cpe:2.3:a:stormshield:sslvpn |
| stormshield | stormshield network security | cpe:2.3:a:stormshield:stormshield_network_security |
Check your server's TLS configuration
The OpenSSL version can't be seen from outside; the free SSL checker tests your certificate, enabled TLS versions and weak ciphers. Confirm the version on your server with the package manager.
Run the SSL checkAffected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- openssl openssl1.0.2 and later · before 1.0.2zg
- openssl openssl1.1.1 and later · before 1.1.1t
- openssl openssl3.0.0 and later · before 3.0.8
- stormshield endpoint securitybefore 7.2.40
- stormshield sslvpnbefore 3.2.1
- stormshield stormshield network security2.7.0 and later · before 2.7.11
- stormshield stormshield network security2.8.0 and later · before 3.7.34
- stormshield stormshield network security3.8.0 and later · before 3.11.22
- stormshield stormshield network security4.0.0 and later · before 4.3.16
- stormshield stormshield network security4.4.0 and later · before 4.6.3
Versions reported by the vendor
Affected version ranges reported by the assigning authority (openssl). Independent of NVD's CPE analysis and usually ahead of it.
OpenSSL OpenSSL
- 3.0.0 and later · before 3.0.8affected · semver
- 1.1.1 and later · before 1.1.1taffected
- 1.0.2 and later · before 1.0.2zgaffected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | edk2-aarch64 | before 20220126gitbb1bba3d77-4.el8 | 20220126gitbb1bba3d77-4.el8 |
| AlmaLinux:8 | edk2-ovmf | before 20220126gitbb1bba3d77-4.el8 | 20220126gitbb1bba3d77-4.el8 |
| AlmaLinux:8 | openssl | before 1:1.1.1k-9.el8_7 | 1:1.1.1k-9.el8_7 |
| AlmaLinux:8 | openssl-devel | before 1:1.1.1k-9.el8_7 | 1:1.1.1k-9.el8_7 |
| AlmaLinux:8 | openssl-libs | before 1:1.1.1k-9.el8_7 | 1:1.1.1k-9.el8_7 |
| AlmaLinux:8 | openssl-perl | before 1:1.1.1k-9.el8_7 | 1:1.1.1k-9.el8_7 |
| AlmaLinux:9 | edk2-aarch64 | before 20221207gitfff6d81270b5-9.el9_2 | 20221207gitfff6d81270b5-9.el9_2 |
| AlmaLinux:9 | edk2-ovmf | before 20221207gitfff6d81270b5-9.el9_2 | 20221207gitfff6d81270b5-9.el9_2 |
| AlmaLinux:9 | edk2-tools | before 20221207gitfff6d81270b5-9.el9_2 | 20221207gitfff6d81270b5-9.el9_2 |
| AlmaLinux:9 | edk2-tools-doc | before 20221207gitfff6d81270b5-9.el9_2 | 20221207gitfff6d81270b5-9.el9_2 |
| AlmaLinux:9 | openssl | before 1:3.0.1-47.el9_1 | 1:3.0.1-47.el9_1 |
| AlmaLinux:9 | openssl-devel | before 1:3.0.1-47.el9_1 | 1:3.0.1-47.el9_1 |
| AlmaLinux:9 | openssl-libs | before 1:3.0.1-47.el9_1 | 1:3.0.1-47.el9_1 |
| AlmaLinux:9 | openssl-perl | before 1:3.0.1-47.el9_1 | 1:3.0.1-47.el9_1 |
| Alpine:v3.14 | openssl | from 1.0.2 · before 1.1.1t-r0 | 1.1.1t-r0 |
| Alpine:v3.15 | openssl3 | before 3.0.8-r0 | 3.0.8-r0 |
| Alpine:v3.17 | openssl | from 1.0.2 · before 3.0.8-r0 | 3.0.8-r0 |
| crates.io | openssl-src | from 0.0.0-0 · before 111.25.0 | 111.25.0 |
| crates.io | openssl-src | from 300.0.0 · before 300.0.12 | 300.0.12 |
| crates.io | openssl-src | before 111.25.0 | 111.25.0 |
| Debian:10 | openssl | before 1.1.1n-0+deb10u4 | 1.1.1n-0+deb10u4 |
| Debian:11 | openssl | before 1.1.1n-0+deb11u4 | 1.1.1n-0+deb11u4 |
| Debian:12 | openssl | before 3.0.8-1 | 3.0.8-1 |
| openSUSE:Leap 15.4 | openssl-1_0_0 | before 1.0.2p-150000.3.65.1 | 1.0.2p-150000.3.65.1 |
+96
Same product
openssl: all recordsOther highest-scoring records for the same primary product.
- CVE-2014-0160The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remKEV90Now
- CVE-2021-3711SM2 Decryption Buffer Overflow65This week
- CVE-2003-0545Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code 65This week
Published before and after this one in the same product
- ← EarlierCVE-2023-0217Feb 8, 2023 · NULL dereference validating DSA public key31Monitor
- ← EarlierCVE-2023-0401Feb 8, 2023 · NULL dereference during PKCS7 data verification31Monitor
- Later →CVE-2022-4450Feb 8, 2023 · Double free after calling PEM_read_bio_ex39Monitor
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 |
|---|---|---|
| OpenSSL OpenSSL | 3.0.8 | Vendor (CNA) |
| almalinux:edk2-aarch64 | 20221207gitfff6d81270b5-9.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:edk2-ovmf | 20221207gitfff6d81270b5-9.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:edk2-tools | 20221207gitfff6d81270b5-9.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:edk2-tools-doc | 20221207gitfff6d81270b5-9.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:openssl | 1:3.0.1-47.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:openssl-devel | 1:3.0.1-47.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:openssl-libs | 1:3.0.1-47.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:openssl-perl | 1:3.0.1-47.el9_1 · AlmaLinux:9 | Package registry (OSV) |
| alpine:openssl | 1.1.1t-r0 · Alpine:v3.14 | Package registry (OSV) |
| alpine:openssl3 | 3.0.8-r0 · Alpine:v3.15 | Package registry (OSV) |
| crates.io:openssl-src | 111.25.0 | Package registry (OSV) |
| crates.io:openssl-src | 300.0.12 | Package registry (OSV) |
| debian:openssl | 3.0.8-1 · Debian:12 | Package registry (OSV) |
| opensuse:openssl-1_0_0 | 1.0.2p-150000.3.65.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| opensuse:openssl-1_1 | 1.1.1d-150200.11.57.1 · openSUSE:Leap Micro 5.2 | Package registry (OSV) |
| opensuse:openssl-3 | 3.0.1-150400.4.17.1 · openSUSE:Leap 15.4 | Package registry (OSV) |
| red hat:edk2 | 0:20221207gitfff6d81270b5-9.el9_2 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:edk2-aarch64 | 0:20221207gitfff6d81270b5-9.el9_2 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:edk2-debugsource | 0:20221207gitfff6d81270b5-9.el9_2 · Red Hat:enterprise_linux:9::crb | Package registry (OSV) |
| red hat:edk2-ovmf | 0:20221207gitfff6d81270b5-9.el9_2 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:edk2-tools | 0:20221207gitfff6d81270b5-9.el9_2 · Red Hat:enterprise_linux:9::crb | Package registry (OSV) |
| red hat:openssl | 1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::baseos | Package registry (OSV) |
| red hat:openssl-debuginfo | 1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:openssl-debugsource | 1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:openssl-devel | 1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:openssl-libs | 1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::baseos | Package registry (OSV) |
| red hat:openssl-libs-debuginfo | 1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:openssl-perl | 1:3.0.1-47.el9_1 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| rocky linux:openssl | 1:3.0.1-47.el9_1 · Rocky Linux:9 | Package registry (OSV) |
+7
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:0 | 2023-04-24 |
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.
- Published
- First PoC+74 d
- TodayNov 2, 2026+1363 d
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.
- Hubert KarioRedHatfinder
- Dmitry BelyavskyRedHatremediation developer
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-24-0015 · Jan 8, 2024( Mitsubishi Electric Zafiyeti)
- TR-23-0437 · Aug 2, 2023(Mozilla Firefox Güvenlik Güncellemesi)
- TR-23-0325 · Jun 6, 2023(Red Hat JBoss Enterprise Application Sunucu Güvenlik Güncellemesi)
- TR-23-0309 · May 31, 2023(IBM Güvenlik Bildirimi)
- TR-23-0300 · May 29, 2023(Dell Güvenlik Bildirimi)
- TR-23-0264 · May 5, 2023(IBM Güvenlik Bildirimi)
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-203 · Observable DiscrepancyCVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
nvd-primary
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
Show all references (14 more)Show less
- www.openssl.org/news/secadv/20230207.txt
- psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0003
- cert-portal.siemens.com/productcert/html/ssa-203374.html
- cert-portal.siemens.com/productcert/html/ssa-264814.html
- cert-portal.siemens.com/productcert/html/ssa-337522.html
- cert-portal.siemens.com/productcert/html/ssa-398330.html
- cert-portal.siemens.com/productcert/html/ssa-556635.html
- cert-portal.siemens.com/productcert/html/ssa-561322.html
- cert-portal.siemens.com/productcert/html/ssa-625862.html
- cert-portal.siemens.com/productcert/html/ssa-699386.html
- cert-portal.siemens.com/productcert/html/ssa-769027.html
- cert-portal.siemens.com/productcert/html/ssa-794697.html
- cert-portal.siemens.com/productcert/html/ssa-879734.html
- cert-portal.siemens.com/productcert/html/ssa-943925.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.