CVE-2013-4122
Published: 18 July 2013
Cyrus SASL 2.1.23, 2.1.26, and earlier does not properly handle when a NULL value is returned upon an error by the crypt function as implemented in glibc 2.17 and later, which allows remote attackers to cause a denial of service (thread crash and consumption) via (1) an invalid salt or, when FIPS-140 is enabled, a (2) DES or (3) MD5 encrypted password, which triggers a NULL pointer dereference.
Notes
| Author | Note |
|---|---|
| seth-arnold | NULL return from crypt() if the salt isn't sane Upgraded to medium, bug report shows remote attackers can disable the sasl service by repeating the attack; THREADS=0 configuration is a work-around that may help to prevent abuse. |
| mdeslaur | eglibc only returns NULL from crypt() in 2.17+, so quantal and older are not affected. 2015-09-25: patch was dropped by mistake in debian's 2.1.26 package, fixed again in 2.1.26.dfsg1-14 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
cyrus-sasl2 Launchpad, Ubuntu, Debian |
lucid |
Not vulnerable
|
| precise |
Not vulnerable
|
|
| quantal |
Not vulnerable
|
|
| raring |
Released
(2.1.25.dfsg1-6ubuntu0.1)
|
|
| trusty |
Not vulnerable
(2.1.25.dfsg1-17)
|
|
| upstream |
Released
(2.1.26.dfsg1-14)
|
|
| vivid |
Released
(2.1.26.dfsg1-13ubuntu0.1)
|
|
|
Patches: upstream: http://git.cyrusimap.org/cyrus-sasl/commit/?id=dedad73e5e7a75d01a5f3d5a6702ab8ccd2ff40d (trunk) other: http://sourceforge.net/projects/miscellaneouspa/files/glibc217/cyrus-sasl-2.1.23-glibc217-crypt.diff (2.1.23) other: http://sourceforge.net/projects/miscellaneouspa/files/glibc217/cyrus-sasl-2.1.26-glibc217-crypt.diff (2.1.26) |
||
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4122
- http://openwall.com/lists/oss-security/2013/07/12/3
- http://git.cyrusimap.org/cyrus-sasl/commit/?id=dedad73e5e7a75d01a5f3d5a6702ab8ccd2ff40d
- https://ubuntu.com/security/notices/USN-1988-1
- https://ubuntu.com/security/notices/USN-2755-1
- NVD
- Launchpad
- Debian