CVE-2015-1781
Published: 28 September 2015
Buffer overflow in the gethostbyname_r and other unspecified NSS functions in the GNU C Library (aka glibc or libc6) before 2.22 allows context-dependent attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response, which triggers a call with a misaligned buffer.
From the Ubuntu Security Team
Arjun Shankar discovered that in certain situations the nss_dns code in the GNU C Library did not properly account buffer sizes when passed an unaligned buffer. An attacker could use this to cause a denial of service or possibly execute arbitrary code.
Notes
Author | Note |
---|---|
sbeattie | only happens if gethostbyname_r etc functions are called with a misaligned buffer, which according to upstream in practice does not happen often |
Priority
Status
Package | Release | Status |
---|---|---|
eglibc Launchpad, Ubuntu, Debian |
lucid |
Ignored
(end of life)
|
precise |
Released
(2.15-0ubuntu10.14)
|
|
trusty |
Released
(2.19-0ubuntu6.8)
|
|
upstream |
Needs triage
|
|
utopic |
Does not exist
|
|
vivid |
Does not exist
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
glibc Launchpad, Ubuntu, Debian |
lucid |
Does not exist
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
utopic |
Ignored
(end of life)
|
|
vivid |
Ignored
(end of life)
|
|
wily |
Released
(2.21-0ubuntu4.2)
|
|
xenial |
Not vulnerable
(2.23-0ubuntu1)
|
|
yakkety |
Not vulnerable
(2.23-0ubuntu1)
|
|
zesty |
Not vulnerable
(2.23-0ubuntu1)
|
|
Patches: upstream: https://sourceware.org/git/?p=glibc.git;a=commit;h=2959eda9272a03386 |