VulnerabilityModified
CVE-2023-35784
A double free or use after free could occur after SSL_clear in OpenBSD 7.2 before errata 026 and 7.3 before errata 004, and in LibreSSL before 3.6.3 and 3.7.x before 3.7.3.
CRITICAL 9.8EPSS 0.95%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.95%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A double free or use after free could occur after SSL_clear in OpenBSD 7.2 before errata 026 and 7.3 before errata 004, and in LibreSSL before 3.6.3 and 3.7.x before 3.7.3. NOTE: OpenSSL is not affected.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.95% probability · 59th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415, CWE-416
- Affected
- openbsd/libressl · openbsd/openbsd
- Source
- cve@mitre.org
References
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.6.3-relnotes.txtRelease Notes
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.7.3-relnotes.txtRelease Notes
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/026_ssl.patch.sigPatch
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/004_ssl.patch.sigPatch
- https://github.com/libressl/openbsd/commit/e42d8f4b21a8a498e2eabbffe4c7b7d4ef7cec54
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.6.3-relnotes.txtRelease Notes
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.7.3-relnotes.txtRelease Notes
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/026_ssl.patch.sigPatch
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/004_ssl.patch.sigPatch
- https://github.com/libressl/openbsd/commit/e42d8f4b21a8a498e2eabbffe4c7b7d4ef7cec54
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.