An oversight while backporting a feature leads to an assertion failure in buffer.c:420
Published Oct 30, 2019
7.5
HIGHCVSS 3.1
EPSS 1.57%
Description
While backporting a feature for a newer branch of BIND9, RedHat introduced a path leading to an assertion failure in buffer.c:420. Affects RedHat versions bind-9.9.4-65.el7 -> bind-9.9.4-72.el7. No ISC releases are affected. Other packages from other distributions who made the same error may also be affected.
Affected products
-
- Version RedHat BIND9 bind-9.9.4-65.el7 -> bind-9.9.4-72.el7StatusaffectedConstraints-
- Version
Running on/with
- 7.0
No data.
Red Hat Enterprise Linux 7
bind-32:9.9.4-73.el7_6
Fixed · RHSA-2019:0194
Red Hat Enterprise Linux 5
bind
Not affected
Red Hat Enterprise Linux 5
bind97
Not affected
Red Hat Enterprise Linux 6
bind
Not affected
Red Hat Enterprise Linux 8
bind
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | bind-32:9.9.4-73.el7_6 | Fixed | RHSA-2019:0194 |
| Red Hat Enterprise Linux 5 | bind | Not affected | n/a |
| Red Hat Enterprise Linux 5 | bind97 | Not affected | n/a |
| Red Hat Enterprise Linux 6 | bind | Not affected | n/a |
| Red Hat Enterprise Linux 8 | bind | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This flaw appears to be exploitable only when debug logging is enabled and set to at least a level of 10. As this configuration should be rare in production instances of bind, it is unlikely that most servers will be exploitable. The debug level of the bind server can be checked via the rndc status command, which will return the current trace level as "debug level". A value of 10 or above would most likely make this flaw exploitable.
Red Hat mitigation
Ensure that debug logging is disabled and set to 0. This can be verified on the Bind server by the rndc status command.
References (7)
- https://access.redhat.com/security/cve/CVE-2018-5742 Vendor Advisory
- https://access.redhat.com/security/cve/cve-2018-5742 x_refsource_CONFIRMThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1655844 Issue Tracking
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-17511 Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-5742
- https://www.cve.org/CVERecord?id=CVE-2018-5742
- https://www.openwall.com/lists/oss-security/2018/12/19/6
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2018-5742 | Vendor Advisory | |
| https://access.redhat.com/security/cve/cve-2018-5742 | x_refsource_CONFIRMThird Party Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1655844 | Issue Tracking | |
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-17511 | Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-5742 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-5742 | ||
| https://www.openwall.com/lists/oss-security/2018/12/19/6 |
Change history (0)
No recorded changes yet.