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DebianDEBIAN:DLA-1015-1:A2F8B

HistoryJul 06, 2017 - 8:51 a.m.

[SECURITY] [DLA 1015-1] libgcrypt11 security update

2017-07-0608:51:30

lists.debian.org

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS3

6.8

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

AI Score

6.6

Confidence

High

EPSS

0.004

Percentile

73.2%

JSON

Package : libgcrypt11
Version : 1.5.0-5+deb7u6
CVE ID : CVE-2017-7526

It was discovered that there was a key disclosure vulnerability in libgcrypt11
a library of cryptographic routines:

It is well known that constant-time implementations of modular exponentiation
cannot use sliding windows. However, software libraries such as Libgcrypt,
used by GnuPG, continue to use sliding windows. It is widely believed that,
even if the complete pattern of squarings and multiplications is observed
through a side-channel attack, the number of exponent bits leaked is not
sufficient to carry out a full key-recovery attack against RSA.
Specifically, 4-bit sliding windows leak only 40% of the bits, and 5-bit
sliding windows leak only 33% of the bits.

-- Sliding right into disaster: Left-to-right sliding windows leak
   &lt;https://eprint.iacr.org/2017/627&gt;

For Debian 7 "Wheezy", this issue has been fixed in libgcrypt11 version
1.5.0-5+deb7u6.

We recommend that you upgrade your libgcrypt11 packages.

Regards,

  ,&#x27;&#x27;`.
 : :&#x27;  :     Chris Lamb
 `. `&#x27;`      [email protected] / chris-lamb.co.uk
   `-

OSVersionArchitecturePackageVersionFilename
Debian8mipsellibgcrypt20-udeb< 1.6.3-2+deb8u4libgcrypt20-udeb_1.6.3-2+deb8u4_mipsel.deb
Debian9amd64libgcrypt20-dbgsym< 1.7.6-2+deb9u1libgcrypt20-dbgsym_1.7.6-2+deb9u1_amd64.deb
Debian7i386gnupg< 1.4.12-7+deb7u9gnupg_1.4.12-7+deb7u9_i386.deb
Debian8armhflibgcrypt20-udeb< 1.6.3-2+deb8u4libgcrypt20-udeb_1.6.3-2+deb8u4_armhf.deb
Debian7i386gnupg-curl< 1.4.12-7+deb7u9gnupg-curl_1.4.12-7+deb7u9_i386.deb
Debian8arm64libgcrypt20-dbg< 1.6.3-2+deb8u4libgcrypt20-dbg_1.6.3-2+deb8u4_arm64.deb
Debian8armellibgcrypt20-dbg< 1.6.3-2+deb8u4libgcrypt20-dbg_1.6.3-2+deb8u4_armel.deb
Debian8kfreebsd-i386gnupg< 1.4.18-7+deb8u4gnupg_1.4.18-7+deb8u4_kfreebsd-i386.deb
Debian9arm64libgcrypt20-udeb< 1.7.6-2+deb9u1libgcrypt20-udeb_1.7.6-2+deb9u1_arm64.deb
Debian8kfreebsd-i386gpgv-udeb< 1.4.18-7+deb8u4gpgv-udeb_1.4.18-7+deb8u4_kfreebsd-i386.deb

OS	Version	Architecture	Package	Version	Filename
Debian	8	mipsel	libgcrypt20-udeb	< 1.6.3-2+deb8u4	libgcrypt20-udeb_1.6.3-2+deb8u4_mipsel.deb
Debian	9	amd64	libgcrypt20-dbgsym	< 1.7.6-2+deb9u1	libgcrypt20-dbgsym_1.7.6-2+deb9u1_amd64.deb
Debian	7	i386	gnupg	< 1.4.12-7+deb7u9	gnupg_1.4.12-7+deb7u9_i386.deb
Debian	8	armhf	libgcrypt20-udeb	< 1.6.3-2+deb8u4	libgcrypt20-udeb_1.6.3-2+deb8u4_armhf.deb
Debian	7	i386	gnupg-curl	< 1.4.12-7+deb7u9	gnupg-curl_1.4.12-7+deb7u9_i386.deb
Debian	8	arm64	libgcrypt20-dbg	< 1.6.3-2+deb8u4	libgcrypt20-dbg_1.6.3-2+deb8u4_arm64.deb
Debian	8	armel	libgcrypt20-dbg	< 1.6.3-2+deb8u4	libgcrypt20-dbg_1.6.3-2+deb8u4_armel.deb
Debian	8	kfreebsd-i386	gnupg	< 1.4.18-7+deb8u4	gnupg_1.4.18-7+deb8u4_kfreebsd-i386.deb
Debian	9	arm64	libgcrypt20-udeb	< 1.7.6-2+deb9u1	libgcrypt20-udeb_1.7.6-2+deb9u1_arm64.deb
Debian	8	kfreebsd-i386	gpgv-udeb	< 1.4.18-7+deb8u4	gpgv-udeb_1.4.18-7+deb8u4_kfreebsd-i386.deb