CVE-2015-8708: Stack-based buffer overflow in the conv_euctojis function in codeconv.c in Claws Mail 3.13.1 allows remote att

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HIGH 7.3REMOTEWATCHLISTDOWNGRADE

CVE-2015-8708 is a high-severity flaw (CVSS 7.3) affecting claws-mail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in the conv_euctojis function in codeconv.c in Claws Mail 3.13.1 allows remote attackers to have unspecified impact via a crafted email, involving Japanese character set conversion. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-8614.

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

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

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Weakness	CWE-119
Published	2016-04-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: claws-mail

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2016-04-11 21:59 UTCPublished CVE record published
2026-06-17 00:35 UTCUpdated Record last modified

claws-mail claws-mail DOWNGRADE

Affected: 3.13.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.13.1

1. Check installed version

apt-cache policy claws-mail || rpm -q claws-mail || claws-mail --version

2. No fixed release: DOWNGRADE to a release before 3.13.1 (Debian / Ubuntu)

apt-cache madison claws-mail sudo apt install claws-mail=<VERSION_BEFORE_3.13.1> sudo apt-mark hold claws-mail

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

dnf --showduplicates list claws-mail sudo dnf downgrade claws-mail-<VERSION_BEFORE_3.13.1> sudo dnf versionlock add claws-mail

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-2015-8708?

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

Is CVE-2015-8708 being exploited?

CVE-2015-8708 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-2015-8708 affect?

CVE-2015-8708 affects claws-mail. Severity is high (CVSS 7.3). Stack-based buffer overflow in the conv_euctojis function in codeconv.c in Claws Mail 3.13.1 allows remote attackers to have unspecified impact via a crafted email, involving Japanese character set conversion. NOTE: this vulnerability exis

How urgent is CVE-2015-8708?

Priority 54/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2021-37746 MEDIUM 6.1 UPGRADE UPGRADE textview_uri_security_check in textview.c in Claws Mail before 3.18.0, and Sylpheed through 3.7.0, does not ha
CVE-2020-16094 HIGH 7.5 UPGRADE MITIGATE In imap_scan_tree_recursive in Claws Mail through 3.17.6, a malicious IMAP server can trigger stack consumptio
CVE-2020-15917 CRITICAL 9.8 UPGRADE MITIGATE common/session.c in Claws Mail before 3.17.6 has a protocol violation because suffix data after STARTTLS is mi
CVE-2015-8614 HIGH 7.3 UPGRADE MITIGATE Multiple stack-based buffer overflows in the (1) conv_jistoeuc, (2) conv_euctojis, and (3) conv_sjistoeuc func
CVE-2014-2576 MEDIUM 6.8 UPGRADE MITIGATE plugins/rssyl/feed.c in Claws Mail before 3.10.0 disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host

References

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