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.
02 Description
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.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 3.76% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 89.8% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2022-08-07 17:06Z4 YR AGO
- Last updated
- 2024-08-03 10:29Z2 YR AGO
- Reserved
- 2022-08-07
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-787Out-of-bounds WriteBase
- Data version
- 5.1
- Document digest
- d56b977b5396bc9c6bc265ef2f3653bacdee7c26929deefbc858322c58e17848
05 Affected products
06 References
- github.comhttps://github.com/Exim/exim/wiki/EximSecurity
- www.exim.orghttps://www.exim.org/static/doc/security/
- github.comhttps://github.com/ivd38/exim_overflow
- www.openwall.comhttps://www.openwall.com/lists/oss-security/2022/08/06/8
- github.comhttps://github.com/Exim/exim/compare/exim-4.94...exim-4.95
- github.comhttps://github.com/Exim/exim/commit/d4bc023436e4cce7c23c5f8bb5199e178b4cc743
- lists.debian.org[debian-lts-announce] 20220827 [SECURITY] [DLA 3082-1] exim4 security updatehttps://lists.debian.org/debian-lts-announce/2022/08/msg00014.html
07 Fixed in
Debian 12
- exim4 Fixed in 4.94.2-5
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- exim4 Fixed in 4.94.2-5
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- exim4 Fixed in 4.94.2-5
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- exim4 Fixed in 4.90.1-1ubuntu1.9
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- exim4 Fixed in 4.93-13ubuntu1.6
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- exim4 Fixed in 4.82-3ubuntu2.4+esm4Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- exim4 Fixed in 4.86.2-2ubuntu2.6+esm2Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.