Description
Because of an implementation bug the PA-RISC CRYPTO_memcmp function is effectively reduced to only comparing the least significant bit of each byte. This allows an attacker to forge messages that would be considered as authenticated in an amount of tries lower than that guaranteed by the security claims of the scheme. The module can only be compiled by the HP-UX assembler, so that only HP-UX PA-RISC targets are affected. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenSSL | OpenSSL | Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g) | — |
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 | 1.1.0h-1 | — |
| Debian 13 | openssl | 1.1.0h-1 | — |
| Debian 12 | openssl | 1.1.0h-1 | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.8 | openssl | 1.0.2o-r0 | — |
| Alpine v3.7 | openssl | 1.0.2o-r0 | — |
| Alpine v3.6 | openssl | 1.0.2o-r0 | — |
| Alpine v3.5 | openssl | 1.0.2o-r0 | — |
| Alpine v3.4 | openssl | 1.0.2o-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.3 | openssl | 1.0.2o-r0 | — |
Advisories 2
- WID-SEC-2023-2048 OpenSSL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 20, 2025
- WID-SEC-2025-1212 Oracle Communications Applications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 2, 2025
References
- https://www.tenable.com/security/tns-2018-07
- https://www.tenable.com/security/tns-2018-04
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
- GLSA-201811-21 vendor-advisory
- 103517 vdb-entry
- https://www.tenable.com/security/tns-2018-06
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- https://security.netapp.com/advisory/ntap-20180330-0002/
- 1040576 vdb-entry
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56d5a4bfcaf37fa420aef2bb881aa55e61cf5f2f
- https://www.openssl.org/news/secadv/20180327.txt
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html