Security
Security
OpenSSL fails to properly validate PKCS #1 v1.5 signatures.
| Package | dev-libs/openssl on all architectures |
|---|---|
| Affected versions | < 0.9.7k |
| Unaffected versions | >= 0.9.7k |
| Package | app-emulation/emul-linux-x86-baselibs on the amd64 architecture |
|---|---|
| Affected versions | < 2.5.2 |
| Unaffected versions | >= 2.5.2 |
OpenSSL is a toolkit implementing the Secure Sockets Layer, Transport Layer Security protocols and a general-purpose cryptography library. The x86 emulation base libraries for AMD64 contain a vulnerable version of OpenSSL.
Daniel Bleichenbacher discovered that it might be possible to forge signatures signed by RSA keys with the exponent of 3.
Since several CAs are using an exponent of 3 it might be possible for an attacker to create a key with a false CA signature.
There is no known workaround at this time.
All OpenSSL users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.7k"
All AMD64 x86 emulation base libraries users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-emulation/emul-linux-x86-baselibs-2.5.2"