CVE-2022-3620: Exim DMARC dmarc.c dmarc_dns_lookup use after free
First published: Thu Oct 20 2022(Updated: )
A vulnerability was found in Exim and classified as problematic. This issue affects the function dmarc_dns_lookup of the file dmarc.c of the component DMARC Handler. The manipulation leads to use after free. The attack may be initiated remotely. The name of the patch is 12fb3842f81bcbd4a4519d5728f2d7e0e3ca1445. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-211919.
Credit: cna@vuldb.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Exim Exim | =2022-10-18 | |
| Fedoraproject Fedora | =35 | |
| Fedoraproject Fedora | =36 | |
| Fedoraproject Fedora | =37 |
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Reference Links
- https://git.exim.org/exim.git/commit/12fb3842f81bcbd4a4519d5728f2d7e0e3ca1445
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/667V3ADXQ2MHUJMSXA3VZZEWLVSCIBEU/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XV2K2AWF62FSJ64B5CUZPFT4COK7P5PM/
- https://vuldb.com/?id.211919
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XV2K2AWF62FSJ64B5CUZPFT4COK7P5PM/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/667V3ADXQ2MHUJMSXA3VZZEWLVSCIBEU/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/
Frequently Asked Questions
What is vulnerability CVE-2022-3620?
Vulnerability CVE-2022-3620 is a problematic vulnerability found in Exim that affects the dmarc_dns_lookup function in the DMARC Handler component, leading to use after free.
How severe is CVE-2022-3620 vulnerability?
The severity of vulnerability CVE-2022-3620 is rated as critical with a severity value of 9.8.
Is remote exploitation possible with CVE-2022-3620 vulnerability?
Yes, remote exploitation is possible with CVE-2022-3620 vulnerability.
Which software versions are affected by CVE-2022-3620 vulnerability?
CVE-2022-3620 affects Exim versions 2022-10-18, Fedora 35, Fedora 36, and Fedora 37.
How can I fix CVE-2022-3620 vulnerability?
To fix CVE-2022-3620 vulnerability, it is recommended to apply the patch available at the provided reference links.
- collector/nvd-index
- agent/weakness
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/remedy
- agent/references
- agent/author
- agent/last-modified-date
- agent/title
- agent/description
- agent/first-publish-date
- agent/tags
- agent/event
- vendor/exim
- canonical/exim exim
- version/exim exim/2022-10-18
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/35
- version/fedoraproject fedora/36
- version/fedoraproject fedora/37