CVE-2018-8741 — A directory traversal flaw in SquirrelMail 1

A directory traversal flaw in SquirrelMail 1.4.22 allows an authenticated attacker to exfiltrate (or potentially delete) files from the hosting server, related to ../ in the att_local_name field in Deliver.class.php.

01What is this vulnerability?

A directory traversal flaw in SquirrelMail 1.4.22 allows an authenticated attacker to exfiltrate (or potentially delete) files from the hosting server, related to ../ in the att_local_name field in Deliver.class.php.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-03-17T14:00:00.000Z
• Last modified: 2024-08-05T07:02:26.075Z

09References

• www.openwall.com — http://www.openwall.com/lists/oss-security/2018/03/17/2
• gist.github.com — https://gist.github.com/hannob/3c4f86863c418930ad08853c1109364e
• www.securitytracker.com — http://www.securitytracker.com/id/1040554
• www.debian.org — https://www.debian.org/security/2018/dsa-4168
• insinuator.net — https://insinuator.net/2018/03/squirrelmail-full-disclosure-troopers18/
• paste.pound-python.org — https://paste.pound-python.org/show/OjSLiFTxiBrTk63jqEUu/
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2018/04/msg00012.html
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…