The definite_length_decoder function in lib/util/quickder.c in Mozilla Network Security Services (NSS) before 3.16.2.4 and 3.17.x before 3.17.3 does not ensure that the DER encoding of an ASN.1 length is properly formed, which allows remote attackers to conduct data-smuggling attacks by using a long byte sequence for an encoding, as demonstrated by the SEC_QuickDERDecodeItem function's improper handling of an arbitrary-length encoding of 0x00.
Conclusion & alert: CVE-2014-1569 is rated High Exploit Risk (74.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.18%). Core evidence: 4 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 3.64% | 3.18% | -0.45% |
| 2 | 2025-12-07 | 2.46% | 3.64% | +1.18% |
| 3 | 2025-12-04 | — | 2.46% | — |
Full EPSS history (12 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2014-1569 not yet assigned priority: Debian including 1 source packages (nss), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2014-1569 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2014-1569 |
suse
|
medium | CVE-2014-1569 severity moderate: SUSE including 523 source package names (MozillaFirefox-31.4.0esr-0.3.1, MozillaFirefox-31.4.0esr-0.8.7, …), 751 product×package rows across 77 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-Basic-On-Demand, … (77 product lines)): Fixed 594, Known Affected 157. | https://www.suse.com/security/cve/CVE-2014-1569/ |
ubuntu
|
medium | CVE-2014-1569 medium priority: Ubuntu including 1 source packages (nss), 5 status rows across 5 suites (lucid, precise, trusty, upstream, utopic): released 5. | https://ubuntu.com/security/CVE-2014-1569 |
: <a href="http://cwe.mitre.org/data/definitions/444.html">CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')</a>
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| mozilla | network_security_services | <= 3.16.2.3 | cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:* |
| mozilla | network_security_services | 3.16.2.0 | cpe:2.3:a:mozilla:network_security_services:3.16.2.0:*:*:*:*:*:*:* |
| mozilla | network_security_services | 3.16.2.1 | cpe:2.3:a:mozilla:network_security_services:3.16.2.1:*:*:*:*:*:*:* |
| mozilla | network_security_services | 3.16.2.2 | cpe:2.3:a:mozilla:network_security_services:3.16.2.2:*:*:*:*:*:*:* |
| mozilla | network_security_services | 3.17.0 | cpe:2.3:a:mozilla:network_security_services:3.17.0:*:*:*:*:*:*:* |
| mozilla | network_security_services | 3.17.1 | cpe:2.3:a:mozilla:network_security_services:3.17.1:*:*:*:*:*:*:* |
| mozilla | network_security_services | 3.17.2 | cpe:2.3:a:mozilla:network_security_services:3.17.2:*:*:*:*:*:*:* |