Vulnerability in Mozilla Firefox
CVE-2015-2721
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.
Vulnerability class: POODLE (CVE-2014-3566)
Published · last modified .
CVSS v2 metric
CVSS v2 base score 4.3 (Medium). Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.033 (88.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000
Affected products
- Mozilla Firefox — versions 31.0, 31.1.0, 31.1.1
- Mozilla Firefox Esr — versions 31.1, 31.2, 31.3
- Mozilla Network Security Services — versions 3.19
- Mozilla Thunderbird
- Novell SUSE Linux Enterprise Desktop — versions 12.0
- Novell SUSE Linux Enterprise Server — versions 11, 12.0
- Novell SUSE Linux Enterprise Software Development Kit — versions 12.0
- Oracle Solaris — versions 11.3
- Oracle Vm Server — versions 3.2
- Canonical Ubuntu Linux — versions 12.04, 14.04, 14.10
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html (Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2015-07/msg00025.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2015-07/msg00033.html (vendor-advisory, Third Party Advisory)
- developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.19_release_notes (Release Notes)
- www.securityfocus.com/bid/83398 (vdb-entry)
- security.gentoo.org/glsa/201512-10 (vendor-advisory)
- security.gentoo.org/glsa/201701-46 (vendor-advisory)
- www.debian.org/security/2015/dsa-3336 (vendor-advisory, Third Party Advisory)
- www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html (Third Party Advisory)
- www.securityfocus.com/bid/75541 (vdb-entry)
Frequently asked questions
- What is CVE-2015-2721?
- CVE-2015-2721 is a vulnerability in Mozilla Firefox, classified under Cryptographic Issues. Published 2015-07-06.
- Is CVE-2015-2721 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.