Test ID:	1.3.6.1.4.1.25623.1.0.703565
Category:	Debian Local Security Checks
Title:	Debian Security Advisory DSA 3565-1 (botan1.10 - security update)
Summary:	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-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.
Description:	Summary: 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-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. Affected Software/OS: botan1.10 on Debian Linux Solution: For the stable distribution (jessie), these problems have been fixed in version 1.10.8-2+deb8u1. We recommend that you upgrade your botan1.10 packages. CVSS Score: 10.0 CVSS Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2015-5726 Debian Security Information: DSA-3565 (Google Search) http://www.debian.org/security/2016/dsa-3565 Common Vulnerability Exposure (CVE) ID: CVE-2015-5727 Common Vulnerability Exposure (CVE) ID: CVE-2015-7827 http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183669.html http://marc.info/?l=botan-devel&m=146185420505943&w=2 Common Vulnerability Exposure (CVE) ID: CVE-2016-2194 https://security.gentoo.org/glsa/201612-38 http://marc.info/?l=botan-devel&m=145435148602911&w=2 http://marc.info/?l=botan-devel&m=145449001708138&w=2 Common Vulnerability Exposure (CVE) ID: CVE-2016-2195 Common Vulnerability Exposure (CVE) ID: CVE-2016-2849 https://security.gentoo.org/glsa/201701-23
Copyright	Copyright (C) 2016 Greenbone Networks GmbH

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