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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2015-8077 from the MITRE CVE dictionary dictionary and NIST NVD.
Not vulnerable. This issue did not affect the versions of cyrus-imapd as shipped with Red Hat Enterprise Linux 5, 6 and 7, as they did not include the patch to fix CVE-2015-8076, which introduced the CVE-2015-8077 issue.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 5.8 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:N/C:N/I:P/A:P |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | Partial |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | cyrus-imapd | Not affected |
| Red Hat Enterprise Linux 6 | cyrus-imapd | Not affected |
| Red Hat Enterprise Linux 5 | cyrus-imapd | Not affected |
Vulmon