Vulnerability in GNU Gnupg
CVE-2015-0837
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."
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.020 (80.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- GNU Gnupg — versions before 1.4.19
- GNU Libgcrypt — versions before 1.6.3
- Gnupg
- Gnupg Libgcrypt
- Debian Linux — versions 7.0, 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.debian.org/security/2015/dsa-3184 (Third Party Advisory)
- www.debian.org/security/2015/dsa-3185 (Third Party Advisory)
- lists.gnupg.org/pipermail/gnupg-announce/2015q1/000363.html (Mailing List, Vendor Advisory)
- lists.gnupg.org/pipermail/gnupg-announce/2015q1/000364.html (Mailing List, Vendor Advisory)
- ieeexplore.ieee.org/document/7163050 (Third Party Advisory)
Frequently asked questions
- What is CVE-2015-0837?
- CVE-2015-0837 is a medium-severity vulnerability in GNU Gnupg, classified under Observable Discrepancy. CVSS score: 5.9/10. Published 2019-11-29.
- How severe is CVE-2015-0837?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2015-0837 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.