Description
GnuPG before 1.4.14, and Libgcrypt before 1.5.3 as used in GnuPG 2.0.x and possibly other products, allows local users to obtain private RSA keys via a cache side-channel attack involving the L3 cache, aka Flush+Reload.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | gnupg | 1.4.12-7+deb7u1 | DSA-2730-1 |
| Debian 7 | libgcrypt11 | 1.5.0-5+deb7u1 | DSA-2731-1 |
| Debian 6.0 | gnupg | 1.4.10-4+squeeze2 | DSA-2730-1 |
| Debian 6.0 | libgcrypt11 | 1.4.5-2+squeeze1 | DSA-2731-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | libgcrypt +1 | 1.4.5-11.el6_4 | RHSA-2013:1457 |
| RHEL 5 | gnupg | 1.4.5-18.el5_10 | RHSA-2013:1458 |
| RHEL 5 | libgcrypt +1 | 1.4.4-7.el5_10 | RHSA-2013:1457 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libgcrypt | 1.7.3-1.3 | openSUSE-SU-2024:10037-1 |
Advisories 5
- RHSA-2013:1457 Red Hat Security Advisory: libgcrypt security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2013:1458 Red Hat Security Advisory: gnupg security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2731-1 libgcrypt11 - information leak Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2730-1 gnupg - information leak Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10037-1 libgcrypt-cavs-1.7.3-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- DSA-2731 vendor-advisory
- 54332 third-party-advisory
- 54321 third-party-advisory
- 54375 third-party-advisory
- openSUSE-SU-2013:1294 vendor-advisory
- 61464 vdb-entry
- USN-1923-1 vendor-advisory
- http://eprint.iacr.org/2013/448
- [gnupg-announce] 20130725 [Announce] [security fix] GnuPG 1.4.14 released mailing-list
- VU#976534 third-party-advisory
- DSA-2730 vendor-advisory
- RHSA-2013:1457 vendor-advisory
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=717880
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
- 54318 third-party-advisory