CVE-2007-2173: Eval injection vulnerability in (1) courier-imapd.indirect and (2) courier-pop3d.indirect in Courier-IMAP befo

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HIGH 10.0DOWNGRADE

CVE-2007-2173 is a high-severity flaw (CVSS 10.0) affecting courier-imap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Eval injection vulnerability in (1) courier-imapd.indirect and (2) courier-pop3d.indirect in Courier-IMAP before 4.0.6-r2, and 4.1.x before 4.1.2-r1, on Gentoo Linux allows remote attackers to execute arbitrary commands via the XMAILDIR variable, related to the LOGINRUN variable.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	4.7% (top 8%)
CISA exploited list	No
Published	2007-04-24
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: double precision incorporated

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-04-24 16:19 UTCPublished CVE record published
2026-06-16 22:39 UTCUpdated Record last modified

double precision incorporated courier-imap DOWNGRADE

Affected: 4.0.0 · 4.0.1 · 4.0.2 · 4.0.3 · 4.0.4 · 4.0.5 · 4.1.0 · 4.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.0

1. Check installed version

apt-cache policy courier-imap || rpm -q courier-imap || courier-imap --version

2. No fixed release: DOWNGRADE to a release before 4.0.0 (Debian / Ubuntu)

apt-cache madison courier-imap sudo apt install courier-imap=<VERSION_BEFORE_4.0.0> sudo apt-mark hold courier-imap

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list courier-imap sudo dnf downgrade courier-imap-<VERSION_BEFORE_4.0.0> sudo dnf versionlock add courier-imap

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2007-2173?

courier-imap: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-2173 being exploited?

CVE-2007-2173 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2007-2173 affect?

CVE-2007-2173 affects courier-imap. Severity is high (CVSS 10.0). Eval injection vulnerability in (1) courier-imapd.indirect and (2) courier-pop3d.indirect in Courier-IMAP before 4.0.6-r2, and 4.1.x before 4.1.2-r1, on Gentoo Linux allows remote attackers to execute arbitrary commands via the XMAILDIR var

How urgent is CVE-2007-2173?

Priority 58/100. Critical severity; EPSS top 8%: very likely to be exploited

Related CVEs

CVE-2004-0777 HIGH 7.5 DOWNGRADE Format string vulnerability in the auth_debug function in Courier-IMAP 1.6.0 through 2.2.1 and 3.x through 3.0
CVE-2004-0224 HIGH 7.5 DOWNGRADE DOWNGRADE Multiple buffer overflows in (1) iso2022jp.c or (2) shiftjis.c for Courier-IMAP before 3.0.0, Courier before 0
CVE-2003-0040 HIGH 7.5 DOWNGRADE DOWNGRADE SQL injection vulnerability in the PostgreSQL auth module for courier 0.40 and earlier allows remote attackers

References

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