Description
During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenSSL | OpenSSL | openssl-1.1.0, openssl-1.1.0a, openssl-1.1.0b, openssl-1.1.0c, openssl-1.1.0d | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openssl | 1.1.0e-1 | — |
| Debian 13 | openssl | 1.1.0e-1 | — |
| Debian 12 | openssl | 1.1.0e-1 | — |
Advisories 1
- WID-SEC-2025-1212 Oracle Communications Applications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 2, 2025
References
- 96269 vdb-entry
- https://www.openssl.org/news/secadv/20170216.txt
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbgn03728en_us
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- https://github.com/openssl/openssl/commit/4ad93618d26a3ea23d36ad5498ff4f59eff3a4d2
- 1037846 vdb-entry
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html