uw-imap — security advisory
University of Washington IMAP Toolkit 2007f on UNIX, as used in imap_open() in PHP and other products, launches an rsh command (by means of the imap_rimap function in c-client/imap4r1.c and the tcp_aopen function in osdep/unix/tcp_unix.c) without preventing argument injection, which might allow remote attackers to execute arbitrary OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics. For example, if rsh is a link to ssh (as seen on Debian and Ubuntu systems), then the attack can use an IMAP server name containing a "-oProxyCommand" argument.
- Products
- uw-imap
- Affected versions
- Not specified
- Fixed versions
- 8:2007f~dfsg-6
- CVEs
- CVE-2018-19518
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 00:10 UTC · Revision 1
Source evidence
University of Washington IMAP Toolkit 2007f on UNIX, as used in imap_open() in PHP and other products, launches an rsh command (by means of the imap_rimap function in c-client/imap4r1.c and the tcp_aopen function in osdep/unix/tcp_unix.c) without preventing argument injection, which might allow remote attackers to execute arbitrary OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics. For example, if rsh is a link to ssh (as seen on Debian and Ubuntu systems), then the attack can use an IMAP server name containing a "-oProxyCommand" argument.
osv:DEBIAN-CVE-2018-19518
uw-imap
Fixed versions: 8:2007f~dfsg-6
Complete source record
{
"id": "19917044f05ebf1e578342256be4d6bb8fd7f07bb9073683e2f5ec7979785e6f",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2018-19518",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2018-19518",
"summary": "University of Washington IMAP Toolkit 2007f on UNIX, as used in imap_open() in PHP and other products, launches an rsh command (by means of the imap_rimap function in c-client/imap4r1.c and the tcp_aopen function in osdep/unix/tcp_unix.c) without preventing argument injection, which might allow remote attackers to execute arbitrary OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics. For example, if rsh is a link to ssh (as seen on Debian and Ubuntu systems), then the attack can use an IMAP server name containing a \"-oProxyCommand\" argument.",
"evidence": "osv:DEBIAN-CVE-2018-19518",
"products": [
{
"name": {
"value": "uw-imap",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8:2007f~dfsg-6",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2018-19518",
"aliases": [
"DEBIAN-CVE-2018-19518"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8:2007f~dfsg-6"
}
]
}
],
"package": {
"name": "uw-imap",
"purl": "pkg:deb/debian/uw-imap?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-19518.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:03:03.427846023Z",
"provider": "osv",
"upstream": [
"CVE-2018-19518"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2018-19518"
]
},
"related_cves": [
{
"value": "CVE-2018-19518",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 420258,
"published_at": "2018-11-25T10:29:00.25+00:00"
}