CVE-2023-45287
published 2023-12-05CVE-2023-45287: Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but…
PriorityP340high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
1.25%
65.7th percentile
Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but analysis shows this may not have been fully effective. In particular it appears as if the removal of PKCS#1 padding may leak timing information, which in turn could be used to recover session key bits. In Go 1.20, the crypto/tls library switched to a fully constant time RSA implementation, which we do not believe exhibits any timing side channels.
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | golang-1.15 | — | — |
| debian | golang-1.19 | — | — |
| go_standard_library | crypto_tls | < 1.20.0 | 1.20.0 |
| golang | go | < 1.20.0 | 1.20.0 |
| msrc | azl3_gcc_13.2.0-7_on_azure_linux_3.0 | — | — |
| msrc | azl3_golang_1.20.0-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_golang_1.23.8-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_golang_1.23.9-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_golang_1.24.3-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_python-tensorboard_2.16.2-6_on_azure_linux_3.0 | — | — |
| msrc | azl3_tensorflow_2.16.1-9_on_azure_linux_3.0 | — | — |
| msrc | cbl2_gcc_11.2.0-8_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_golang_1.17.13-2_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_golang_1.18.8-7_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_golang_1.20.0-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_golang_1.21.6-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_msft-golang_1.20.0-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_python-tensorboard_2.11.0-3_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_tensorflow_2.11.1-2_on_cbl_mariner_2.0 | — | — |
| paloalto | pan-os | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
osv7.5HIGH
vendor_debian7.5HIGH
vendor_msrc7.5HIGH
vendor_redhat7.5HIGH
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Palo Alto
PAN-SA-2024-0013 Informational Bulletin: Impact of OSS CVEs in PAN-OS
vendor_paloalto·2024-11-01·CVSS 9.8
CVE-2017-12424 [CRITICAL] PAN-SA-2024-0013 Informational Bulletin: Impact of OSS CVEs in PAN-OS
PAN-SA-2024-0013 Informational Bulletin: Impact of OSS CVEs in PAN-OS
The Palo Alto Networks Product Security Assurance team has evaluated the following open source software (OSS) CVEs as they relate to PAN-OS software. While PAN-OS software may include the
CVEs: CVE-2017-12424, CVE-2021-3114, CVE-2021-31525, CVE-2021-33195, CVE-2021-33197, CVE-2021-33198, CVE-2021-34558, CVE-2021-36221, CVE-2021-4034, CVE-2021-44716, CVE-2021-44717, CVE-2022-1664, CVE-2022-1705, CVE-2022-23772, CVE-2022-24675, CVE-2022-24921, CVE-2022-28327, CVE-2022-2880, CVE-2022-29526, CVE-2022-30629, CVE-2022-30631, CVE-2022-30632, CVE-2022-32148, CVE-2022-32189, CVE-2022-41715, CVE-2022-41717, CVE-2022-41724, CVE-2022-41725, CVE-2023-24534, CVE-2023-24536, CVE-2023-24539, CVE-2023-29406, CVE-2023-29409, CVE-2023-39
Microsoft
Before Go 1.20, the RSA based key exchange methods in crypto/tls may exhibit a timing side channel
vendor_msrc·2023-12-12·CVSS 7.5
CVE-2023-45287 [HIGH] CWE-203 Before Go 1.20, the RSA based key exchange methods in crypto/tls may exhibit a timing side channel
Before Go 1.20, the RSA based key exchange methods in crypto/tls may exhibit a timing side channel
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
Go: Go
Customer Action Required: Yes
Remediation: CBL-Marin
Red Hat
golang: crypto/tls: Timing Side Channel attack in RSA based TLS key exchanges.
vendor_redhat·2023-12-05·CVSS 7.5
CVE-2023-45287 [HIGH] CWE-208 golang: crypto/tls: Timing Side Channel attack in RSA based TLS key exchanges.
golang: crypto/tls: Timing Side Channel attack in RSA based TLS key exchanges.
Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but analysis shows this may not have been fully effective. In particular it appears as if the removal of PKCS#1 padding may leak timing information, which in turn could be used to recover session key bits. In Go 1.20, the crypto/tls library switched to a fully constant time RSA implementation, which we do not believe exhibits any timing side channels.
A flaw was found in the Golang crypto/tls standard library. In previous versions, the package was vulnerable to a Timing Side Channel attack by observing the time it took for RSA-based TLS key exchanges, which
Debian
CVE-2023-45287: golang-1.15 - Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which...
vendor_debian·2023·CVSS 7.5
CVE-2023-45287 [HIGH] CVE-2023-45287: golang-1.15 - Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which...
Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but analysis shows this may not have been fully effective. In particular it appears as if the removal of PKCS#1 padding may leak timing information, which in turn could be used to recover session key bits. In Go 1.20, the crypto/tls library switched to a fully constant time RSA implementation, which we do not believe exhibits any timing side channels.
Scope: local
bullseye: open
GHSA
GHSA-33qr-2xwr-95pw: Before Go 1
ghsa_unreviewed·2023-12-05
CVE-2023-45287 [HIGH] CWE-203 GHSA-33qr-2xwr-95pw: Before Go 1
Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but analysis shows this may not have been fully effective. In particular it appears as if the removal of PKCS#1 padding may leak timing information, which in turn could be used to recover session key bits. In Go 1.20, the crypto/tls library switched to a fully constant time RSA implementation, which we do not believe exhibits any timing side channels.
OSV
CVE-2023-45287: Before Go 1
osv·2023-12-05·CVSS 7.5
CVE-2023-45287 [HIGH] CVE-2023-45287: Before Go 1
Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but analysis shows this may not have been fully effective. In particular it appears as if the removal of PKCS#1 padding may leak timing information, which in turn could be used to recover session key bits. In Go 1.20, the crypto/tls library switched to a fully constant time RSA implementation, which we do not believe exhibits any timing side channels.
OSV
Before Go 1.20, the RSA based key exchange methods in crypto/tls may exhibit a timing side channel
osv·2023-12-05
CVE-2023-45287 Before Go 1.20, the RSA based key exchange methods in crypto/tls may exhibit a timing side channel
Before Go 1.20, the RSA based key exchange methods in crypto/tls may exhibit a timing side channel
Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but analysis shows this may not have been fully effective. In particular it appears as if the removal of PKCS#1 padding may leak timing information, which in turn could be used to recover session key bits.
In Go 1.20, the crypto/tls library switched to a fully constant time RSA implementation, which we do not believe exhibits any timing side channels.
No detection rules found.
No public exploits indexed.
https://go.dev/cl/326012/26https://go.dev/issue/20654https://groups.google.com/g/golang-announce/c/QMK8IQALDvAhttps://people.redhat.com/~hkario/marvin/https://pkg.go.dev/vuln/GO-2023-2375https://security.netapp.com/advisory/ntap-20240112-0005/https://go.dev/cl/326012/26https://go.dev/issue/20654https://groups.google.com/g/golang-announce/c/QMK8IQALDvAhttps://people.redhat.com/~hkario/marvin/https://pkg.go.dev/vuln/GO-2023-2375https://security.netapp.com/advisory/ntap-20240112-0005/
2023-12-05
Published