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CVE
CVE-2023-4058
Memory safety bugs present in Firefox 115. Some of these bugs showed evidence of memory corruption and we presume that w
Memory safety bugs present in Firefox 115. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 116.
CRITICAL · CVSS 9.8
EPSS 0.00313
EPSS exploitation odds0.31% · top 45%
Schedule remediation
- CVSS base score ≥ 7.0
Sigma rules1
YARA rules0
Look this up elsewhere - one-click external pivots
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How to read a CVE - triage first, then detect and patch
This page is every public fact about CVE-2023-4058, cross-linked. Its job is to answer one question fast - does this need my attention now? - and then hand you the two things you do about it. Here is how an analyst reads it.
Triage: should I act now? Four signals, and they are not interchangeable:
CVSSseverity - how bad it is IF exploited, 0-10. A high CVSS alone is not urgency; a flaw can be a perfect 10 and never actually be attacked.
EPSSprobability - a model’s estimate of the chance it is exploited in the next 30 days, 0-1. This is the “will it actually happen” signal.
CISA KEVconfirmed - it is being exploited in the wild right now. The strongest signal on the page; KEV beats any score.
Weaponisedavailability - public exploits / PoCs, and especially Metasploit modules rated Excellent / Great. Reliable, packaged exploit code means low-skill attackers can use it today.
How they combine: KEV, or a dependable Metasploit module, means patch now regardless of CVSS. High CVSS + low EPSS + no exploit is real but not an emergency - schedule it. Low CVSS but KEV-listed still gets patched now. The verdict above already weighed these for you; this is how it got there.
Then what - two workflows:
Detectwhen you cannot patch today, follow this CVE to the ATT&CK techniques it enables, then Build a SIEM detection (the green button) - author a rule, test it in Atomic, deploy it. That buys visibility while the patch waits.
PatchAffected products / packages tell you if you are exposed; Fixed versions by distribution and Vendor advisories give the exact version that closes it.
Reading order for the panels below: verdict + badges, then Public exploits / Metasploit (is it weaponised), then ATT&CK techniques + Sigma / IDS rules (can I detect it), then Affected products / packages + Fixed versions (am I exposed, what patches it), then Threat actors / IOCs (who uses it), then Scoring & timeline / references (the evidence).
EPSS exploitation probability
0.31%
Top 45%odds of exploitation in the next 30 days
CVSS metric silhouette
shape grows toward worst-case
CVSS vector breakdown
Exploitability - how they get in
Attack Vector
Network
Adjacent
Local
Physical
Attack Complexity
Low
High
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Impact - what breaks
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLifecycle
- 01 Aug 2023Published to NVD
- 21 Nov 2024Last modified
Every entry is a recorded date - NVD publish/modify, CISA KEV add, public exploit disclosure. No inferred events.
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ATT&CK techniques
1Techniques this CVE enables - linked via CWE → CAPEC → ATT&CK. Pills with a solid outline are named directly in ATT&CK or Nuclei templates (high confidence); the others are linked through weakness mappings.
▤ Build a SIEM detection for these techniques⬡
Weakness Classification
CWE-787Out-of-bounds Write
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Affected Products & Versions
1mozilla firefox< 116.0
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Related CVEs
8CVEs linked to this one by a shared weakness (CWE) or affected product - joins on data already in the engine, with the reason shown per row. Not a guess.
CVE-2002-2227
Buffer underflow in ssldump 0.9b2 and earlier allows remote attackers to cause a...
same CWE-787
CVE-2003-0870
Heap-based buffer overflow in Opera 7.11 and 7.20 allows remote attackers to exe...
same CWE-787
CVE-2003-1396
Heap-based buffer overflow in Opera 6.05 through 7.10 allows remote attackers to...
same CWE-787
CVE-2004-0398
Heap-based buffer overflow in the ne_rfc1036_parse date parsing function for the...
same CWE-787
CVE-2002-2436
The Cascading Style Sheets (CSS) implementation in Mozilla Firefox before 4.0, T...
same product
CVE-2002-2437
The JavaScript implementation in Mozilla Firefox before 4.0, Thunderbird before ...
same product
CVE-2003-1492
Netscape Navigator 7.0.2 and Mozilla allows remote attackers to access cookie in...
same product
CVE-2004-0648
Mozilla (Suite) before 1.7.1, Firefox before 0.9.2, and Thunderbird before 0.7.2...
same product
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Sigma Hunt Rules
1Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSQLite Firefox Profile Data DB Access
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Vendor Advisories
4suse-csafopenSUSE-SU-2024:14572-1
suse-csafopenSUSE-SU-2024:13124-1
usnUSN-6267-1
mozilla-mfsaMFSA2023-29
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References & Sources
3Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.