CVE-2017-7526 (GCVE-0-2017-7526)
Vulnerability from cvelistv5 – Published: 2018-07-26 13:00 – Updated: 2025-12-17 22:06
VLAI
EPSS
VEX
Summary
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.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-17 22:06 UTC
CWE
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://usn.ubuntu.com/3733-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| http://www.securitytracker.com/id/1038915 | vdb-entryx_refsource_SECTRACK |
| https://www.debian.org/security/2017/dsa-3960 | vendor-advisoryx_refsource_DEBIAN |
| https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcr… | x_refsource_CONFIRM |
| https://www.debian.org/security/2017/dsa-3901 | vendor-advisoryx_refsource_DEBIAN |
| https://usn.ubuntu.com/3733-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://eprint.iacr.org/2017/627 | x_refsource_MISC |
| http://www.securityfocus.com/bid/99338 | vdb-entryx_refsource_BID |
| https://lists.gnupg.org/pipermail/gnupg-announce/… | mailing-listx_refsource_MLIST |
| https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcr… | x_refsource_CONFIRM |
| https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcr… | x_refsource_CONFIRM |
Impacted products
Date Public
2017-06-29 00:00
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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-30T11:30:07+00:00",
"cve": "CVE-2017-7526",
"id": "CVE-2017-7526",
"initial_release_date": "2017-06-29T00:00:00+00:00",
"product_status:known_affected": "10",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "libgcrypt: Use of left-to-right sliding window method allows full RSA key recovery",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2017/cve-2017-7526.json",
"version": "3"
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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