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CVE-2018-0734

Timing attack against DSA

Medium5.9EPSS 12.2%
Published
Updated
Reserved
Assigned by
openssl

Description

The OpenSSL DSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. Fixed in OpenSSL 1.1.1a (Affected 1.1.1). Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.0.2q (Affected 1.0.2-1.0.2p).

Scores

CVSS scores of CVE-2018-0734, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.1Medium5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (exploitation in 30 days)
12.2% · top 3.8% of all CVEs (3 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: yes · Technical impact: partial

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.

Weakness

Affected products

  • OpenSSL · OpenSSL

    • affected Fixed in OpenSSL 1.1.1a (Affected 1.1.1)
    • affected Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i)
    • affected Fixed in OpenSSL 1.0.2q (Affected 1.0.2-1.0.2p)

References (29)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .