CVE-2017-7526

Severity

43%

Complexity

86%

Confidentiality

48%

libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware where the private RSA key is used.

libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware where the private RSA key is used.

CVSS 3.0 Base Score 6.8. CVSS Attack Vector: network. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N).

CVSS 2.0 Base Score 4.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N).

Overview

First reported 6 years ago

2018-07-26 13:29:00

Last updated 5 years ago

2019-10-09 23:29:00

Affected Software

Canonical Ubuntu Linux 12.04 ESM (Extended Security Maintenance)

12.04

Canonical Ubuntu Linux 14.04 LTS (Long-Term Support)

14.04

Canonical Ubuntu Linux 16.04 LTS (Long-Term Support)

16.04

Debian Linux 8.0 (Jessie)

8.0

Debian Linux 9.0

9.0

References

99338

Third Party Advisory, VDB Entry

1038915

Third Party Advisory, VDB Entry

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526

Issue Tracking, Patch, Third Party Advisory

https://eprint.iacr.org/2017/627

Third Party Advisory

https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=78130828e9a140a9de4dafadbc844dbb64cb709a

Patch, Vendor Advisory

https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=8725c99ffa41778f382ca97233183bcd687bb0ce

Patch, Vendor Advisory

https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=e6a3dc9900433bbc8ad362a595a3837318c28fa9

Patch, Vendor Advisory

[gnupg-announce] 20170629 Libgcrypt 1.7.8 released to fix CVE-2017-7526

Mailing List, Vendor Advisory

USN-3733-1

Third Party Advisory

USN-3733-2

Third Party Advisory

DSA-3901

Third Party Advisory

DSA-3960

Third Party Advisory

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