Debian Security Advisory

DLA-449-1 botan1.10 -- LTS security update

Date Reported:

30 Apr 2016

Affected Packages:

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2014-9742, CVE-2015-5726, CVE-2015-5727, CVE-2015-7827, CVE-2016-2194, CVE-2016-2195, CVE-2016-2849.

More information:

Several security vulnerabilities were found in botan1.10, a C++ library which provides support for many common cryptographic operations, including encryption, authentication, X.509v3 certificates and CRLs.

CVE-2014-9742
A bug in Miller-Rabin primality testing was responsible for insufficient randomness.
CVE-2015-5726
The BER decoder would crash due to reading from offset 0 of an empty vector if it encountered a BIT STRING which did not contain any data at all. This can be used to easily crash applications reading untrusted ASN.1 data, but does not seem exploitable for code execution.
CVE-2015-5727
The BER decoder would allocate a fairly arbitrary amount of memory in a length field, even if there was no chance the read request would succeed. This might cause the process to run out of memory or invoke the OOM killer.
CVE-2015-7827
Use constant time PKCS #1 unpadding to avoid possible side channel attack against RSA decryption
CVE-2016-2194
Infinite loop in modular square root algorithm. The ressol function implementing the Tonelli-Shanks algorithm for finding square roots could be sent into a nearly infinite loop due to a misplaced conditional check. This could occur if a composite modulus is provided, as this algorithm is only defined for primes. This function is exposed to attacker controlled input via the OS2ECP function during ECC point decompression.
CVE-2016-2195
Fix Heap overflow on invalid ECC point.
CVE-2016-2849
Use constant time modular inverse algorithm to avoid possible side channel attack against ECDSA

For Debian 7 Wheezy, these problems have been fixed in version 1.10.5-1+deb7u1.

We recommend that you upgrade your botan1.10 packages.