CVE-2015-2721
NSS: incorrectly permited skipping of ServerKeyExchange (MFSA 2015-71)
Severity Score
4.3
*CVSS v2
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
Mozilla Network Security Services (NSS) before 3.19, as used in Mozilla Firefox before 39.0, Firefox ESR 31.x before 31.8 and 38.x before 38.1, Thunderbird before 38.1, and other products, does not properly determine state transitions for the TLS state machine, which allows man-in-the-middle attackers to defeat cryptographic protection mechanisms by blocking messages, as demonstrated by removing a forward-secrecy property by blocking a ServerKeyExchange message, aka a "SMACK SKIP-TLS" issue.
Mozilla Network Security Services (NSS) anterior a 3.19, utilizado en Mozilla Firefox anterior a 39.0, Firefox ESR 31.x anterior a 31.8 y 38.x anterior a 38.1, Thunderbird anterior a 38.1, y otros productos, no determina correctamente las transiciones de estado para la máquina de estados TLS, lo que permite a atacantes man-in-the-middle derrotar los mecanismos de protección criptográfica mediante el bloqueo de mensajes, tal y como fue demostrado mediante la eliminación de una propiedad de confidencialidad adelantada mediante el bloqueo de un mensaje ServerKeyExchange, también conocido como un problema de 'SMACK SKIP-TLS' .
It was found that NSS permitted skipping of the ServerKeyExchange packet during a handshake involving ECDHE (Elliptic Curve Diffie-Hellman key Exchange). A remote attacker could use this flaw to bypass the forward-secrecy of a TLS/SSL connection.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2015-03-25 CVE Reserved
- 2015-07-06 CVE Published
- 2024-03-12 EPSS Updated
- 2024-08-06 CVE Updated
- 2024-08-06 First Exploit
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-310: Cryptographic Issues
- CWE-358: Improperly Implemented Security Check for Standard
CAPEC
References (31)
| URL | Tag | Source |
|---|---|---|
| http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html | Third Party Advisory |
|
| http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html | Third Party Advisory |
|
| http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html | Third Party Advisory |
|
| http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html | Third Party Advisory |
|
| http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html | Third Party Advisory |
|
| http://www.securityfocus.com/bid/75541 | Vdb Entry | |
| http://www.securityfocus.com/bid/83398 | Vdb Entry | |
| http://www.securityfocus.com/bid/91787 | Third Party Advisory | |
| http://www.securitytracker.com/id/1032783 | Vdb Entry | |
| http://www.securitytracker.com/id/1032784 | Vdb Entry | |
| https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.19_release_notes | Release Notes | |
| https://smacktls.com | Technical Description |
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1086145 | 2024-08-06 |
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Search vendor "Mozilla" for product "Firefox" | <= 38.1.0 Search vendor "Mozilla" for product "Firefox" and version " <= 38.1.0" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.0 Search vendor "Mozilla" for product "Firefox Esr" and version "31.0" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.1 Search vendor "Mozilla" for product "Firefox Esr" and version "31.1" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.1.0 Search vendor "Mozilla" for product "Firefox Esr" and version "31.1.0" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.1.1 Search vendor "Mozilla" for product "Firefox Esr" and version "31.1.1" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.2 Search vendor "Mozilla" for product "Firefox Esr" and version "31.2" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.3 Search vendor "Mozilla" for product "Firefox Esr" and version "31.3" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.3.0 Search vendor "Mozilla" for product "Firefox Esr" and version "31.3.0" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.4 Search vendor "Mozilla" for product "Firefox Esr" and version "31.4" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.5 Search vendor "Mozilla" for product "Firefox Esr" and version "31.5" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.5.1 Search vendor "Mozilla" for product "Firefox Esr" and version "31.5.1" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.5.2 Search vendor "Mozilla" for product "Firefox Esr" and version "31.5.2" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.5.3 Search vendor "Mozilla" for product "Firefox Esr" and version "31.5.3" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.6.0 Search vendor "Mozilla" for product "Firefox Esr" and version "31.6.0" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 31.7.0 Search vendor "Mozilla" for product "Firefox Esr" and version "31.7.0" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | 38.0 Search vendor "Mozilla" for product "Firefox Esr" and version "38.0" | - |
Safe
|
| Mozilla Search vendor "Mozilla" | Network Security Services Search vendor "Mozilla" for product "Network Security Services" | 3.19 Search vendor "Mozilla" for product "Network Security Services" and version "3.19" | - |
Affected
| in | Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | <= 38.0.1 Search vendor "Mozilla" for product "Thunderbird" and version " <= 38.0.1" | - |
Safe
|
| Novell Search vendor "Novell" | Suse Linux Enterprise Software Development Kit Search vendor "Novell" for product "Suse Linux Enterprise Software Development Kit" | 12.0 Search vendor "Novell" for product "Suse Linux Enterprise Software Development Kit" and version "12.0" | - |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 14.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.10" | - |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 15.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "15.04" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0" | - |
Affected
| ||||||
| Novell Search vendor "Novell" | Suse Linux Enterprise Desktop Search vendor "Novell" for product "Suse Linux Enterprise Desktop" | 12.0 Search vendor "Novell" for product "Suse Linux Enterprise Desktop" and version "12.0" | - |
Affected
| ||||||
| Novell Search vendor "Novell" | Suse Linux Enterprise Server Search vendor "Novell" for product "Suse Linux Enterprise Server" | 11 Search vendor "Novell" for product "Suse Linux Enterprise Server" and version "11" | sp4 |
Affected
| ||||||
| Novell Search vendor "Novell" | Suse Linux Enterprise Server Search vendor "Novell" for product "Suse Linux Enterprise Server" | 12.0 Search vendor "Novell" for product "Suse Linux Enterprise Server" and version "12.0" | - |
Affected
| ||||||
| Oracle Search vendor "Oracle" | Solaris Search vendor "Oracle" for product "Solaris" | 11.3 Search vendor "Oracle" for product "Solaris" and version "11.3" | - |
Affected
| ||||||
| Oracle Search vendor "Oracle" | Vm Server Search vendor "Oracle" for product "Vm Server" | 3.2 Search vendor "Oracle" for product "Vm Server" and version "3.2" | - |
Affected
| ||||||