Buffer overflow in Exim
CVE-2022-37452
Exim before 4.95 has a heap-based buffer overflow for the alias list in host_name_lookup in host.c when sender_host_name is set.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.038 (89.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.038 · newest: 0.038 · change: -0.000
Affected products
- Exim
- Debian Linux — versions 10.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/Exim/exim/wiki/EximSecurity (Third Party Advisory, Release Notes)
- www.exim.org/static/doc/security/ (Vendor Advisory)
- github.com/ivd38/exim_overflow (Exploit, Patch, Third Party Advisory)
- www.openwall.com/lists/oss-security/2022/08/06/8 (Mailing List, Third Party Advisory)
- github.com/Exim/exim/compare/exim-4.94...exim-4.95 (Patch, Third Party Advisory, Release Notes)
- github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743 (Patch, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/08/msg00014.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-37452?
- CVE-2022-37452 is a critical-severity vulnerability in Exim, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-08-07.
- How severe is CVE-2022-37452?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2022-37452 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.