CVE-2017-5461

Mozilla Network Security Services (NSS) before 3.21.4, 3.22.x through 3.28.x before 3.28.4, 3.29.x before 3.29.5, and 3.30.x before 3.30.1 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly have unspecified other impact by leveraging incorrect base64 operations.

Published: 2017-05-11 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-5461 is rated Moderate Risk (63.4/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.61%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-5461

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 2026-05-21 0.92% 0.61% -0.32%
2 2026-01-18 1.24% 0.92% -0.31%
3 2025-11-21 — 1.24% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-5461

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2017-5461

OS Trackers for CVE-2017-5461

vendor priority summary link
debian not yet assigned CVE-2017-5461 not yet assigned priority: Debian including 3 source packages (firefox, firefox-esr, nss), 11 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 11. https://security-tracker.debian.org/tracker/CVE-2017-5461
gentoo high CVE-2017-5461: 2 GLSA(s) (201705-04, 201802-03), 3 atom(s) (dev-libs/nss, www-client/firefox, www-client/firefox-bin); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-5461
redhat critical — https://access.redhat.com/security/cve/CVE-2017-5461
suse high CVE-2017-5461 severity important: SUSE including 168 source package names (MozillaFirefox, MozillaFirefox-102.11.0-150200.152.87.1, …), 546 product×package rows across 87 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-Basic-On-Demand, … (87 product lines)): Fixed 512, Known Not Affected 34. https://www.suse.com/security/cve/CVE-2017-5461/
ubuntu medium CVE-2017-5461 medium priority: Ubuntu including 3 source packages (firefox, nss, thunderbird), 18 status rows across 6 suites (precise, trusty, upstream, xenial, yakkety, zesty): released 15, ignored 3. https://ubuntu.com/security/CVE-2017-5461

Affected software / configurations for CVE-2017-5461

Vendor Product Version Raw CPE
mozilla network_security_services < 3.21.4 cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*
mozilla network_security_services > 3.22, < 3.28.4 cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*
mozilla network_security_services >= 3.29, < 3.29.5 cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*
mozilla network_security_services >= 3.30, < 3.30.1 cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*

References for CVE-2017-5461

URL Tags
http://www.debian.org/security/2017/dsa-3831 Patch
http://www.debian.org/security/2017/dsa-3872 Patch
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html Patch
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html Patch
http://www.securityfocus.com/bid/98050 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1038320 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2017:1100 Patch
https://access.redhat.com/errata/RHSA-2017:1101 Patch
https://access.redhat.com/errata/RHSA-2017:1102 Patch
https://access.redhat.com/errata/RHSA-2017:1103 Patch
https://bugzilla.mozilla.org/show_bug.cgi?id=1344380 Issue Tracking Permissions Required
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21.4_release_notes Release Notes Vendor Advisory
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.28.4_release_notes Release Notes Vendor Advisory
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.29.5_release_notes Release Notes Vendor Advisory
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.30.1_release_notes Release Notes Vendor Advisory
https://security.gentoo.org/glsa/201705-04 Third Party Advisory
https://www.mozilla.org/en-US/security/advisories/mfsa2017-10/#CVE-2017-5461 Vendor Advisory
https://www.mozilla.org/en-US/security/advisories/mfsa2017-11/#CVE-2017-5461 Vendor Advisory
https://www.mozilla.org/en-US/security/advisories/mfsa2017-12/#CVE-2017-5461 Vendor Advisory
https://www.mozilla.org/en-US/security/advisories/mfsa2017-13/#CVE-2017-5461 Vendor Advisory
https://www.oracle.com//security-alerts/cpujul2021.html
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