What’s Vulnerable › Vulnerabilities

CVE-2020-7845: Jiransecurity Spamsniper Stack-based Buffer Overflow Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-12-27 · updated 2026-06-17
• Weakness: CWE-121

Description

Spamsniper 5.0 ~ 5.2.7 contain a stack-based buffer overflow vulnerability caused by improper boundary checks when parsing MAIL FROM command. It leads remote attacker to execute arbitrary code via crafted packet.

Affected products

• Jiransecurity Spamsniper: from 5.0.2 before 5.7.6 — fixed in 5.7.6

How to fix

Upgrade to a fixed version: Jiransecurity Spamsniper 5.7.6. Check the vendor advisory for mitigations.

References

• https://www.jiransecurity.com/
• https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=35855
• https://www.jiransecurity.com/
• https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=35855

Get alerted when CVE-2020-7845 or the next vulnerability affects your stack