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CVE-2017-15705

23
FAUCET Score

CVE-2017-15705 is a denial-of-service vulnerability affecting Apache SpamAssassin before version 3.4.2, as well as products from Canonical, Debian, and Red Hat. Maliciously crafted emails with unclosed HTML tags can cause scan timeouts due to incorrect markup handling. This vulnerability has a CVSS score of 5.3 (Medium), indicating a low attack complexity and no user interaction required, leading to a potential loss of availability. While the exploit has been observed in the wild, it is not believed to have been part of a deliberate denial-of-service attempt, and there is no known public exploit code or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.4.2CPE matchmatch criteria
cpe:2.3:a:apache:spamassassin:*:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
7.88%
Probability of exploitation in next 30 days
EPSS Percentile
94.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0788 is in the 92nd percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: spamassassin-0:3.4.0-4.el7_5
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: spamassassin
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: spamassassin

Vendor Advisories (1)

redhatCVE-2017-15705Important

spamassassin: Certain unclosed tags in crafted emails allow for scan timeouts and result in denial of service

Sep 17, 2018

References

lists.opensuse.org / opensuse-security-announce/2019-08/msg00002.html
access.redhat.com / errata/RHSA-2018:2916
Third Party Advisory
lists.apache.org / thread.html/7f6a16bc0fd0fd5e67c7fd95bd655069a2ac7d1f88e42d3c853e601c%40%3Cannounce.apache.org%3E
lists.debian.org / debian-lts-announce/2018/11/msg00016.html
Third Party Advisory
security.gentoo.org / glsa/201812-07
usn.ubuntu.com / 3811-1
Third Party Advisory
usn.ubuntu.com / 3811-2
Third Party Advisory
securityfocus.com / bid/105347
Third Party AdvisoryVDB Entry