CVE-2015-1793

mediumpriority · attend · 56EPSS 0.582 · 99 %ileexploit · functionalDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · functional

Likely / severe?

58.2% (99th) EPSS

CVSS 6.4 · medium

Is it mine?

31 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

The X509_verify_cert function in crypto/x509/x509_vfy.c in OpenSSL 1.0.1n, 1.0.1o, 1.0.2b, and 1.0.2c does not properly process X.509 Basic Constraints cA values during identification of alternative certificate chains, which allows remote attackers to spoof a Certification Authority role and trigger unintended certificate verifications via a valid leaf certificate.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.06.4mediumAV:N/AC:L/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 4.9

v3.06.5mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 2.5

v2.06.4mediumAV:N/AC:L/Au:N/C:P/I:P/A:Nsecondary · FSTEC (BDU) RU

v3.06.5mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-254USprimaryCWE-254US

exploits (2)

Public proof-of-concept and weaponised exploit code.

auxiliary/server/openssl_altchainsforgery_mitm_proxyOpenSSL Alternative Chains Certificate Forgery MITM Proxyfunctional · metasploit
EDB-38640OpenSSL - Alternative Chains Certificate ForgeryPoC · exploit_db

affected products (31)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
F5 BIG-IPall versionscert_bundDEcpe:/a:f5:big-ip:-
F5 Enterprise Managerall versionscert_bundDEcpe:/a:f5:enterprise_manager:-
Oracle MySQL <=5.5.44all versionscert_bundDE
Oracle MySQL <=5.6.25all versionscert_bundDE
Oracle MySQL Enterprise Monitor <=2.3.20all versionscert_bundDE
Oracle MySQL Enterprise Monitor <=3.0.22all versionscert_bundDE
Red Hat Enterprise Linux 6all versionscert_bundDEcpe:/o:redhat:enterprise_linux:6
Red Hat Enterprise Linux 7all versionscert_bundDEcpe:/o:redhat:enterprise_linux:7
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Oracle MySQL≤ 5.5.44cert_bundDE
Oracle MySQL≤ 5.6.25cert_bundDE
Oracle MySQL Enterprise Monitor≤ 2.3.20cert_bundDE
Oracle MySQL Enterprise Monitor≤ 3.0.22cert_bundDE
n/a n/a≤ n/aenisa_euvdEU
OpenSSL Software Foundation OpenSSL≤ 1.0.2cfstec_bduRU
OpenSSL Software Foundation OpenSSL≤ 1.0.2bfstec_bduRU
OpenSSL Software Foundation OpenSSL≤ 1.0.1ofstec_bduRU

showing 20 of 31

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-1483Oracle MySQL: Mehrere Schwachstellen gefährden die Integrität, Vertraulichkeit und VerfügbarkeitDeutsch2015-10-20csaf · cert_bundDE
Ein entfernter, authentisierter, entfernter, anonymer oder lokaler Angreifer kann mehrere Schwachstellen in Oracle MySQL ausnutzen, um dadurch die Integrität, Vertraulichkeit und Verfügbarkeit zu gefährden.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2015-07-09modified 2026-06-17

related (800)

Related entries.

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+795 more

references (64)

External citations — patches, advisories, analysis.

scry

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