CVE-2015-7547 Glibc DNS Resolver Vulnerability
Description
A vulnerability in the GNU libc (glibc) DNS resolver allows remote code execution (CVE-2015-7547). However, this issue can be exploited only from a DNS server that is under the control of an attacker. (Ref # 91886).
This glibc issue is only exploitable by an attacker controlling the DNS server configured for the device. Furthermore, the attacker must overcome additional anti-exploitation mitigations, such as ASLR, to mount a successful attack.
This issue affects PAN-OS 5.0.19 and earlier; PAN-OS 5.1.12 and earlier; PAN-OS 6.0.14 and earlier; PAN-OS 6.1.12 and earlier; PAN-OS 7.0.7 and earlier; PAN-OS 7.1.3 and earlier
Product Status
| Versions | Affected | Unaffected |
|---|---|---|
| PAN-OS 7.1 | <= 7.1.3 | >= 7.1.4 |
| PAN-OS 7.0 | <= 7.0.7 | >= 7.0.8 |
| PAN-OS 6.1 | <= 6.1.12 | >= 6.1.13 |
| PAN-OS 6.0 | <= 6.0.14 | >= 6.0.15 |
| PAN-OS 5.1 | <= 5.1.12 | >= 5.1.13 |
| PAN-OS 5.0 | <= 5.0.19 | >= 5.0.20 |
Severity: HIGH
CVSSv3.0 Base Score: 8.1 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Weakness Type
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
Solution
PAN-OS 5.0.20 and later; PAN-OS 5.1.13 and later; PAN-OS 6.0.15 and later; PAN-OS 6.1.13 and later; PAN-OS 7.0.8 and later; PAN-OS 7.1.4 and later
Workarounds and Mitigations
This vulnerability can affect PAN-OS software only when the device is configured with a DNS server that is under the control of an attacker. Palo Alto Networks discourages configuring the device with untrusted DNS servers.