Description
Integer overflow in the index_urlfetch function in imap/index.c in Cyrus IMAP 2.3.19, 2.4.18, and 2.5.6 allows remote attackers to have unspecified impact via vectors related to urlfetch range checks and the start_octet variable. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-8076.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | cyrus-imapd-2.4 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | cyrus-imapd | 2.3.18-37.1 | SUSE-SU-2016:1457-1 |
| SLES 12 | cyrus-imapd | 2.3.18-37.1 | SUSE-SU-2016:1457-1 |
| SLES 11 SP4 | cyrus-imapd | 2.3.11-60.65.67.1 | SUSE-SU-2016:1459-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | cyrus-imapd | 2.3.18-37.1 | SUSE-SU-2016:1457-1 |
| SLES for SAP 12 | cyrus-imapd | 2.3.18-37.1 | SUSE-SU-2016:1457-1 |
| SLES for SAP 11 SP4 | cyrus-imapd | 2.3.11-60.65.67.1 | SUSE-SU-2016:1459-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | cyrus-imapd | 2.4.18-3.4 | openSUSE-SU-2024:10015-1 |
Advisories 3
- SUSE-SU-2016:1457-1 Security update for cyrus-imapd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1459-1 Security update for cyrus-imapd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10015-1 cyradm-2.4.18-3.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- [Cyrus-devel] 20151005 Recent security fixes mailing-list
- https://docs.cyrus.foundation/imap/release-notes/2.5/x/2.5.7.html
- [oss-security] 20151104 Re: CVE request: urlfetch range handling flaw in Cyrus IMAP mailing-list
- [oss-security] 20150930 Re: CVE request: urlfetch range handling flaw in Cyrus IMAP mailing-list
- openSUSE-SU-2015:2130 vendor-advisory
- https://cyrus.foundation/cyrus-imapd/commit/?id=745e161c834f1eb6d62fc14477f51dae799e1e08
- SUSE-SU-2016:1459 vendor-advisory
- 1034282 vdb-entry
- SUSE-SU-2016:1457 vendor-advisory
- openSUSE-SU-2015:2200 vendor-advisory