CVE-2020-28007 — Link Following in Exim

CWE-59 — Link Following8 documents7 sources
Severity
7.8HIGHNVD
EPSS
0.2%
top 60.93%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Exim
Timeline
PublishedMay 6
Latest updateMay 24

Description

Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges. Because Exim operates as root in the log directory (owned by a non-root user), a symlink or hard link attack allows overwriting critical root-owned files anywhere on the filesystem.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages1 packages

▶NVDexim/exim4.00 — 4.94.2

🔴Vulnerability Details

3
GHSA
GHSA-x5m4-62f7-c437: Exim 4 before 4↗2022-05-24
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CVEList
CVE-2020-28007: Exim 4 before 4↗2021-05-06
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OSV
CVE-2020-28007: Exim 4 before 4↗2021-05-06
▶

📋Vendor Advisories

3
Ubuntu
Exim vulnerabilities↗2021-05-06
▶
Ubuntu
Exim vulnerabilities↗2021-05-04
▶
Debian
CVE-2020-28007: exim4 - Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges. Because Exim ...↗2020
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🕵️Threat Intelligence

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