CVE-2020-28020 — Integer Overflow or Wraparound in Exim

CWE-190 — Integer Overflow or Wraparound10 documents8 sources
Severity
9.8CRITICALNVD
EPSS
21.1%
top 4.34%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Exim
Timeline
PublishedMay 6
Latest updateMay 24

Description

Exim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an unauthenticated remote attacker can execute arbitrary code by leveraging the mishandling of continuation lines during header-length restriction.

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/exim4.00 — 4.92

Patches

Patch: www.exim.org ↗Patch: www.exim.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-p795-3xjq-48vx: Exim 4 before 4↗2022-05-24
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CVEList
CVE-2020-28020: Exim 4 before 4↗2021-05-06
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OSV
CVE-2020-28020: Exim 4 before 4↗2021-05-06
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🔍Detection Rules

2
Suricata
ET EXPLOIT Exim receive_msg Integer Overflow Attempt Inbound M1 (CVE-2020-28020)↗2021-05-04
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Suricata
ET EXPLOIT Exim receive_msg Integer Overflow Attempt Inbound M2 (CVE-2020-28020)↗2021-05-04
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📋Vendor Advisories

3
Ubuntu
Exim vulnerabilities↗2021-05-06
▶
Ubuntu
Exim vulnerabilities↗2021-05-04
▶
Debian
CVE-2020-28020: exim4 - Exim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an unaut...↗2020
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🕵️Threat Intelligence

1
Qualys
21Nails: Multiple Critical Vulnerabilities in Exim Mail Server↗2021-05-04
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