CVE-2022-4304Timing Oracle in RSA Decryption
Updated under an hour ago ()
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It affects OpenSSL and 10 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.9 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-203
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- openssl
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
OpenSSL OpenSSL openssl:openssl (from the name) | from 3.0.0 before 3.0.8; from 1.1.1 before 1.1.1t; from 1.0.2 before 1.0.2zg | CNA record |
Siemens SCALANCE W1750D (JP) siemens:scalance_w1750d_jp (from the name) | before V8.10.0.9 | CISA ADP |
Siemens SCALANCE W1750D (ROW) siemens:scalance_w1750d_row (from the name) | before V8.10.0.9 | CISA ADP |
Siemens SCALANCE W1750D (USA) siemens:scalance_w1750d_usa (from the name) | before V8.10.0.9 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
openssl openssl openssl:openssl | from 1.0.2 before 1.0.2zg; from 1.1.1 before 1.1.1t; from 3.0.0 before 3.0.8 | NVD |
stormshield endpoint_security stormshield:endpoint_security | before 7.2.40 | NVD |
stormshield sslvpn stormshield:sslvpn | before 3.2.1 | NVD |
stormshield stormshield_network_security stormshield:stormshield_network_security | from 2.7.0 before 2.7.11; from 2.8.0 before 3.7.34; from 3.8.0 before 3.11.22; from 4.0.0 before 4.3.16; from 4.4.0 before 4.6.3 | NVD |
References
- https://www.openssl.org/news/secadv/20230207.txtvendor-advisory
- https://security.gentoo.org/glsa/202402-08
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0003
- https://cert-portal.siemens.com/productcert/html/ssa-203374.html
- https://cert-portal.siemens.com/productcert/html/ssa-264814.html
- https://cert-portal.siemens.com/productcert/html/ssa-337522.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-556635.html
- https://cert-portal.siemens.com/productcert/html/ssa-561322.html
- https://cert-portal.siemens.com/productcert/html/ssa-625862.html
- https://cert-portal.siemens.com/productcert/html/ssa-699386.html
- https://cert-portal.siemens.com/productcert/html/ssa-769027.html
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html
- https://cert-portal.siemens.com/productcert/html/ssa-879734.html
- https://cert-portal.siemens.com/productcert/html/ssa-943925.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.