Timing side-channel in SM2 algorithm on 64 bit ARM
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| OpenSSL | OpenSSL | unaffected |
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| Openssl | Openssl | — |
| Source | ID | Title |
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Debian DSA |
DSA-6015-1 | openssl security update |
EUVD |
EUVD-2025-31728 | Issue summary: A timing side-channel which could potentially allow remote recovery of the private key exists in the SM2 algorithm implementation on 64 bit ARM platforms. Impact summary: A timing side-channel in SM2 signature computations on 64 bit ARM platforms could allow recovering the private key by an attacker.. While remote key recovery over a network was not attempted by the reporter, timing measurements revealed a timing signal which may allow such an attack. OpenSSL does not directly support certificates with SM2 keys in TLS, and so this CVE is not relevant in most TLS contexts. However, given that it is possible to add support for such certificates via a custom provider, coupled with the fact that in such a custom provider context the private key may be recoverable via remote timing measurements, we consider this to be a Moderate severity issue. The FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this issue, as SM2 is not an approved algorithm. |
Ubuntu USN |
USN-7786-1 | OpenSSL vulnerabilities |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: 1.6% (1.598% probability within 30 days)
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Siemens
Siemens ruggedcom Rst2428p Siemens ruggedcom Rst2428p Firmware Siemens scalance Xc316-8 Siemens scalance Xc319-4 Siemens scalance Xc324-4 Siemens scalance Xc324-4eec Siemens scalance Xc332 Siemens scalance Xc416-8 Siemens scalance Xc419-4 Siemens scalance Xc424-4 Siemens scalance Xc432 Siemens scalance Xch328 Siemens scalance Xcm324 Siemens scalance Xcm328 Siemens scalance Xcm332 Siemens scalance Xr302-32 Siemens scalance Xr322-12 Siemens scalance Xr326-8 Siemens scalance Xr326-8eec Siemens scalance Xr502-32 Siemens scalance Xr522-12 Siemens scalance Xr524-8c Siemens scalance Xr524-8wg Siemens scalance Xr526-8 Siemens scalance Xr526-8c Siemens scalance Xr528-6m Siemens scalance Xr552-12m Siemens scalance Xrh334 Siemens scalance Xrm334 Siemens sidis Secured Smartplug Siemens sidis Secured Smartplug Firmware Siemens simatic Cn 4100 Siemens simatic Cn 4100 Firmware Siemens sinec Os |
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| CPEs | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* cpe:2.3:h:siemens:ruggedcom_rst2428p:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xc316-8:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xc319-4:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xc324-4:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xc324-4eec:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xc332:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xc416-8:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xc419-4:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xc424-4:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xc432:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xch328:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xcm324:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xcm328:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xcm332:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xr302-32:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xr322-12:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xr326-8:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xr326-8eec:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xr502-32:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xr522-12:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xr524-8c:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xr524-8wg:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xr526-8:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xr526-8c:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xr528-6m:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xr552-12m:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xrh334:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:scalance_xrm334:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:sidis_secured_smartplug:-:*:*:*:*:*:*:* cpe:2.3:h:siemens:simatic_cn_4100:-:*:*:*:*:*:*:* cpe:2.3:o:siemens:ruggedcom_rst2428p_firmware:*:*:*:*:*:*:*:* cpe:2.3:o:siemens:sidis_secured_smartplug_firmware:*:*:*:*:*:*:*:* cpe:2.3:o:siemens:simatic_cn_4100_firmware:*:*:*:*:*:*:*:* cpe:2.3:o:siemens:sinec_os:*:*:*:*:*:*:*:* |
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| Vendors & Products |
Siemens
Siemens ruggedcom Rst2428p Siemens ruggedcom Rst2428p Firmware Siemens scalance Xc316-8 Siemens scalance Xc319-4 Siemens scalance Xc324-4 Siemens scalance Xc324-4eec Siemens scalance Xc332 Siemens scalance Xc416-8 Siemens scalance Xc419-4 Siemens scalance Xc424-4 Siemens scalance Xc432 Siemens scalance Xch328 Siemens scalance Xcm324 Siemens scalance Xcm328 Siemens scalance Xcm332 Siemens scalance Xr302-32 Siemens scalance Xr322-12 Siemens scalance Xr326-8 Siemens scalance Xr326-8eec Siemens scalance Xr502-32 Siemens scalance Xr522-12 Siemens scalance Xr524-8c Siemens scalance Xr524-8wg Siemens scalance Xr526-8 Siemens scalance Xr526-8c Siemens scalance Xr528-6m Siemens scalance Xr552-12m Siemens scalance Xrh334 Siemens scalance Xrm334 Siemens sidis Secured Smartplug Siemens sidis Secured Smartplug Firmware Siemens simatic Cn 4100 Siemens simatic Cn 4100 Firmware Siemens sinec Os |
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cvssV3_1
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Openssl
Openssl openssl |
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Openssl
Openssl openssl |
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| Weaknesses | CWE-208 | |
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threat_severity
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cvssV3_1
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| Description | Issue summary: A timing side-channel which could potentially allow remote recovery of the private key exists in the SM2 algorithm implementation on 64 bit ARM platforms. Impact summary: A timing side-channel in SM2 signature computations on 64 bit ARM platforms could allow recovering the private key by an attacker.. While remote key recovery over a network was not attempted by the reporter, timing measurements revealed a timing signal which may allow such an attack. OpenSSL does not directly support certificates with SM2 keys in TLS, and so this CVE is not relevant in most TLS contexts. However, given that it is possible to add support for such certificates via a custom provider, coupled with the fact that in such a custom provider context the private key may be recoverable via remote timing measurements, we consider this to be a Moderate severity issue. The FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this issue, as SM2 is not an approved algorithm. | |
| Title | Timing side-channel in SM2 algorithm on 64 bit ARM | |
| Weaknesses | CWE-385 | |
| References |
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