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OVAL Definitions
>
OVAL Definition Details
Id
oval:ru.altx-soft.nix:def:26596
[Eng]
Version
2
Class
patch
ALTXid
153871
Language
Russian
Severity
Medium
Title
ALAS-2015-577 -- обновление безопасности для libgcrypt
Description
Fix a side-channel attack on data-dependent timing variations in modular exponentiation, which can potentially lead to an information leak. (CVE-2015-0837)
Fix a side-channel attack which can potentially lead to an information leak. (CVE-2014-3591)
Libgcrypt before 1.5.4, as used in GnuPG and other products, does not properly perform ciphertext normalization and ciphertext randomization, which makes it easier for physically proximate attackers to conduct key-extraction attacks by leveraging the ability to collect voltage data from exposed metal, a different vector than CVE-2013-4576, which was fixed in ALAS-2014-278. (CVE-2014-5270)
Family
unix
Platform
Amazon Linux AMI
Product
libgcrypt
Reference
VENDOR: ALAS-2015-577
VENDOR: ALAS-2015-577
Id:
ALAS-2015-577
Reference:
https://alas.aws.amazon.com/ALAS-2015-577.html
CVE: CVE-2015-0837
CVE: CVE-2015-0837
Id:
CVE-2015-0837
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0837
Comment
: The mpi_powm function in Libgcrypt before 1.6.3 and GnuPG before 1.4.19 allows attackers to obtain sensitive information by leveraging timing differences when accessing a pre-computed table during modular exponentiation, related to a "Last-Level Cache Side-Channel Attack."
CVSSv2 Score:
4.3
Access vector:
NETWORK
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
NONE
Availability impact:
NONE
CVSSv2 Vector:
AV:N/AC:M/Au:N/C:P/I:N/A:N
CVSSv3 Score:
5.9
Attack vector:
NETWORK
Attack complexity:
HIGH
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
NONE
Availability impact:
NONE
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE:
203 (Information Exposure Through Discrepancy)
References:
http://www.debian.org/security/2015/dsa-3184 (MISC)
http://www.debian.org/security/2015/dsa-3185 (MISC)
https://ieeexplore.ieee.org/document/7163050 (MISC)
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000363.html (CONFIRM)
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000364.html (CONFIRM)
CVE: CVE-2014-3591
CVE: CVE-2014-3591
Id:
CVE-2014-3591
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3591
Comment
: Libgcrypt before 1.6.3 and GnuPG before 1.4.19 does not implement ciphertext blinding for Elgamal decryption, which allows physically proximate attackers to obtain the server's private key by determining factors using crafted ciphertext and the fluctuations in the electromagnetic field during multiplication.
CVSSv2 Score:
1.9
Access vector:
LOCAL
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
NONE
Availability impact:
NONE
CVSSv2 Vector:
AV:L/AC:M/Au:N/C:P/I:N/A:N
CVSSv3 Score:
4.2
Attack vector:
PHYSICAL
Attack complexity:
HIGH
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
NONE
Availability impact:
NONE
CVSSv3 Vector:
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE:
200 (Information Exposure)
References:
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000363.html (MISC)
http://www.debian.org/security/2015/dsa-3185 (MISC)
http://www.cs.tau.ac.il/~tromer/radioexp/ (MISC)
https://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000364.html (MISC)
http://www.debian.org/security/2015/dsa-3184 (MISC)
CVE: CVE-2014-5270
CVE: CVE-2014-5270
Id:
CVE-2014-5270
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-5270
Comment
: Libgcrypt before 1.5.4, as used in GnuPG and other products, does not properly perform ciphertext normalization and ciphertext randomization, which makes it easier for physically proximate attackers to conduct key-extraction attacks by leveraging the ability to collect voltage data from exposed metal, a different vector than CVE-2013-4576.
CVSSv2 Score:
2.1
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
NONE
Availability impact:
NONE
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:P/I:N/A:N
CWE:
200 (Information Exposure)
References:
[gnupg-announce] 20140808 [security fix] Libgcrypt and GnuPG (MLIST)
http://www.cs.tau.ac.il/~tromer/handsoff/ (MISC)
[oss-security] 20140816 Re: CVE request: libgcrypt, ELGAMAL side-channel attack (MLIST)
DSA-3073 (DEBIAN)
DSA-3024 (DEBIAN)
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