CVE-2022-3620 — Improper Restriction of Operations within the Bounds of a Memory Buffer in Exim

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory BufferCWE-416 — Use After Free6 documents6 sources
Severity
9.8CRITICALNVD
CNA5.6
EPSS
1.2%
top 20.84%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
EximFedoraproject Fedora
Timeline
PublishedOct 20
Latest updateOct 21

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages1 packages

▶NVDexim/exim4.95 — 4.97

Also affects: Fedora 35, 36, 37

Patches

Patch: git.exim.org ↗Patch: git.exim.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-jcq6-47h7-2c66: A vulnerability was found in Exim and classified as problematic↗2022-10-21
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CVEList
Exim DMARC dmarc.c dmarc_dns_lookup use after free↗2022-10-20
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OSV
CVE-2022-3620: A vulnerability was found in Exim and classified as problematic↗2022-10-20
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📋Vendor Advisories

1
Debian
CVE-2022-3620: exim4 - A vulnerability was found in Exim and classified as problematic. This issue affe...↗2022
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💬Community

1
HackerOne
CVE-2022-27779: cookie for trailing dot TLD↗2022-05-11
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