Nss vulnerabilitiesRanked by how likely they are to be used.
Nss is made by Mozilla. We track 6 published vulnerabilities listed under that exact name, across 178 versions. None of them is on the list of flaws known to be exploited today. Mozilla lists newer releases under their own names, such as Nss Esr, so check those pages too.
We keep watching the known-exploited list.
Is Nss listed under other names? Yes.
Mozilla also lists Nss under more specific names, such as Nss Esr. Flaws listed only under those names are counted on their own pages, not here. If you run one of these, open its page for its own exploited flaws.
Which Nss vulnerabilities are being exploited?
This is the list that matters most: flaws criminals are using now.
None of Nss's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.
Which Nss flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 18%CVE-2021-43527Critical
NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures.
- 3.2%CVE-2016-1938Medium
The s_mp_div function in lib/freebl/mpi/mpi.c in Mozilla Network Security Services (NSS) before 3.21, as used in Mozilla Firefox before 44.0, improperly divides numbers, which might make it easier for remote...
- 2.3%CVE-2016-5285High
A Null pointer dereference vulnerability exists in Mozilla Network Security Services due to a missing NULL check in PK11_SignWithSymKey / ssl3_ComputeRecordMACConstantTime, which could let a remote malicious user...
- 1.5%CVE-2020-12403Critical
A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS in versions before 3.55.
- 0.8%CVE-2023-4421Medium
The NSS code used for checking PKCS#1 v1.5 was leaking information useful in mounting Bleichenbacher-like attacks.
Running Nss? We'll keep checking.
Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.
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- Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
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1 new flaw affects software Acme tracks
The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5 and earlier, Mozilla Network Security Services (NSS) 3.12.4 and earlier, multiple Cisco products, and other products, does not properly associate renegotiation handshakes with an existing connection, which allows man-in-the-middle attackers to insert data into HTTPS sessions, and possibly other types of sessions protected by TLS or SSL, by sending an unauthenticated request that is processed retroactively by a server in a post-renegotiation context, related to a "plaintext injection" attack, aka the "Project Mogul" issue.
- Matched to
- Nss on Acme's software list
- What to do
- Plan in the vendor’s update
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 6 published vulnerabilities listed under the name Nss, across 178 versions.
None of Nss's vulnerabilities is on the list of flaws known to be exploited today.
Mozilla also lists Nss under more specific names, such as Nss Esr. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list.
Create a Precursor Intelligence account and track Nss. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.