A stack consumption vulnerability in the regcomp implementation in the GNU C Library allows an attacker to cause a denial of service (resource exhaustion) via a regular expression containing adjacent repetition operators or adjacent bounded repetitions. Junos uses regular expressions in several places within the CLI. Exploitation of this vulnerability can cause the RE to crash and rpd application leading to a partial denial of service. Repeated exploitation can result in an extended partial outage of services provided by rpd.
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This class of issue has been assigned
CVE-2010-4051 and
CVE-2010-4052.
The following software releases have been updated to resolve this specific issue:
- All Junos OS software releases built on or after 2013-12-12, or
- Junos OS 10.4S15, 10.4R16, 11.4R9-S1, 11.4R10, 12.1R8, 12.1X44-D25, 12.1X45-D15, 12.1X46-D10, 12.2R6, 12.3R4, 13.1R3-S1, 13.2R2, 13.3R1, and all subsequent releases (i.e. all releases built after 13.3R1).
Customers can confirm the build date of any Junos OS release by issuing the command '
show version detail
'.
This issue is being tracked as PR 705445 and is visible on the Customer Support website.
KB16765 - "In which releases are vulnerabilities fixed?" describes which release vulnerabilities are fixed as per our End of Engineering and End of Life support policies.
Use access lists or firewall filters to limit access to the router CLI only from trusted hosts.
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."