CVE-2015-1793
Published: 9 July 2015
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | introduced by the following commit in 1.0.2b and 1.0.1n: https://git.openssl.org/?p=openssl.git;a=commit;h=6281abc79623419eae6a64768c478272d5d3a426 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
openssl Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(1.0.1-4ubuntu5.31)
|
| trusty |
Not vulnerable
(1.0.1f-1ubuntu2.15)
|
|
| upstream |
Needs triage
|
|
| utopic |
Not vulnerable
(1.0.1f-1ubuntu9.8)
|
|
| vivid |
Not vulnerable
(1.0.1f-1ubuntu11.4)
|
|
|
openssl098 Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
|
| trusty |
Does not exist
(trusty was not-affected)
|
|
| upstream |
Needs triage
|
|
| utopic |
Not vulnerable
|
|
| vivid |
Not vulnerable
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |