The (1) S_reghop3, (2) S_reghop4, and (3) S_reghopmaybe3 functions in regexec.c in Perl before 5.24.0 allow context-dependent attackers to cause a denial of service (infinite loop) via crafted utf-8 data, as demonstrated by "a\x80."
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2015-8853 from the MITRE CVE dictionary dictionary and NIST NVD.
Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 5.4 |
|---|---|
| Base Metrics | AV:N/AC:H/Au:N/C:N/I:N/A:C |
| Access Vector | Network |
| Access Complexity | High |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Complete |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux | perl516-perl | Will not fix |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-perl520-perl | Will not fix |
| Red Hat Enterprise Linux 7 | perl | Will not fix |
| Red Hat Enterprise Linux 6 | perl | Will not fix |
| Red Hat Enterprise Linux 5 | perl | Will not fix |
| Red Hat Directory Server 8 | perl | Will not fix |
Vulmon