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CVE mentions, exploit signals, and PoC evidence in one fast public view.

CVE detail

CVE-2018-15453

A vulnerability in the Secure/Multipurpose Internet Mail Extensions (S/MIME) Decryption and Verification or S/MIME Public Key Harvesting features of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause an affected device to corrupt system memory. A successful exploit could cause the filtering process to unexpectedly reload, resulting in a denial of service (DoS) condition on the device. The vulnerability is due to improper input validation of S/MIME-signed emails. An attacker could exploit this vulnerability by sending a malicious S/MIME-signed email through a targeted device. If Decryption and Verification or Public Key Harvesting is configured, the filtering process could crash due to memory corruption and restart, resulting in a DoS condition. The software could then resume processing the same S/MIME-signed email, causing the filtering process to crash and restart again. A successful exploit could allow the attacker to cause a permanent DoS condition. This vulnerability may require manual intervention to recover the ESA.

CVSS 8.6 · HighBuzz score 21.9

Buzz score

Why this CVE is surfacing

Buzz score total 21.9

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 13.9 · diversity 8.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
13.9
3 evidence mentions in the snapshot
Diversity score
8.0
3 sources across 1 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
3 source links · newest first
  • CISCO addresses DoS bugs in CISCO ESA productsSecurity Affairs

    Cisco addressed two DoS vulnerabilities in CISCO ESA products that can be exploited by remote unauthenticated attacker. Cisco fixed two denial-of-service (DoS) flaws in Email Security Appliance (ESA) products that can be exploited by a remote unauthenticated attacker. The first flaw tracked as CVE-2018-15453 has been rated as “critical,” it is a memory corruption bug caused […]

    newssecurityaffairs.comJan 10, 2019, 8:55 PM
  • Cisco Patches Serious DoS Flaws in Email Security ApplianceSecurityWeek

    Cisco this week patched two serious denial-of-service (DoS) vulnerabilities that can be exploited remotely without authentication in its Email Security Appliance (ESA) products.

    newswww.securityweek.comJan 10, 2019, 1:51 PM
  • Cisco fixes serious DoS flaws in its email security appliancesHelp Net Security

    Cisco has plugged a heap of security holes in many of its products, including two vulnerabilities (one critical) that open its email security appliances to denial of service attacks. About the vulnerabilities Both vulnerabilities affect the Cisco AsyncOS Software for Cisco Email Security Appliances, and can be exploited remotely by unauthenticated attackers. CVE-2018-15453 can be exploited by sending a malicious S/MIME-signed email through a targeted device. “If Decryption and Verification or Public Key Harvesting is … More →

    newswww.helpnetsecurity.comJan 10, 2019, 10:09 AM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars
No public PoC repositories have been matched yet.

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