CVE-2015-3193: canonical ubuntu_linux
Vulnerability summary
CVE-2015-3193 is a high (CVSS 7.5) vulnerability in canonical ubuntu_linux. EPSS estimates a 25.14% chance of exploitation in the next 30 days, higher than 97.9% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 25% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 3 · Related 3Timeline
- 06-12-2015PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The Montgomery squaring implementation in crypto/bn/asm/x86_64-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x86_64 platform, as used by the BN_mod_exp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key information via an attack against use of a (1) Diffie-Hellman (DH) or (2) Diffie-Hellman Ephemeral (DHE) ciphersuite.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
25.14%
Chance of exploitation in the next 30 days
Percentile
98%
Versus all other CVEs
30-day change
No change 0.00 pp
From 25.14% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 15.04 | 15.10
Debian1 product
- openssl< 1.0.2e-1
Nodejs1 product
- node.js≥ 4.0.0, ≤ 4.1.2 | ≥ 4.2.0, < 4.2.3 | ≥ 5.0.0, < 5.1.1
Openssl1 product
- opensslEOL1.0.2 | 1.0.2a | 1.0.2b | 1.0.2c | 1.0.2d
Ubuntu1 product
- openssl< 1.0.1f-1ubuntu2.15
5 vendors · 5 products
References
27 links- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151204-opensslVendor AdvisoryThird Party Advisory
- kb.isc.org/article/AA-01438Third Party Advisory
- www.fortiguard.com/advisory/openssl-advisory-december-2015Third Party Advisory
- www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.754583Vendor AdvisoryThird Party Advisory
- kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40100Third Party Advisory
- www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.539966Vendor AdvisoryThird Party Advisory
- kb.juniper.net/InfoCenter/index?page=content&id=JSA10761Third Party Advisory
Show all 27 references
- openssl.org/news/secadv/20151203.txtVendor Advisory
- fortiguard.com/advisory/openssl-advisory-december-2015Third Party Advisory
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05398322Third Party Advisory
- kb.juniper.net/InfoCenter/index?page=content&id=JSA10759Third Party Advisory
