Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | cyrus-sasl2 | 2.1.26.dfsg1-14 | — |
| Debian 13 | cyrus-sasl2 | 2.1.26.dfsg1-14 | — |
| Debian 12 | cyrus-sasl2 | 2.1.26.dfsg1-14 | — |
| Debian 8 | cyrus-sasl2 | 2.1.26.dfsg1-13+deb8u1 | DSA-3368-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.23 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.22 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.21 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.20 | cyrus-sasl | 2.1.26-r7 | — |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.18 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.17 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.16 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.15 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.14 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.13 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.12 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.11 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.10 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.9 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.8 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.7 | cyrus-sasl | 2.1.26-r7 | — |
| Alpine v3.5 | cyrus-sasl | 2.1.26-r7 | — |
Advisories 1
- DSA-3368-1 cyrus-sasl2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://git.cyrusimap.org/cyrus-sasl/commit/?id=dedad73e5e7a75d01a5f3d5a6702ab8ccd2ff40d
- https://www.linuxquestions.org/questions/slackware-14/%5Bslackware-current%5D-glibc-2-17-shadow-and-other-penumbrae-4175461061/
- GLSA-201309-01 vendor-advisory
- USN-2755-1 vendor-advisory
- [oss-security] 20130715 Re: CVE request: Cyrus-sasl NULL ptr. dereference mailing-list
- [oss-security] 20130713 Re: CVE request: Cyrus-sasl NULL ptr. dereference mailing-list
- [oss-security] 20130712 Re: CVE request: Cyrus-sasl NULL ptr. dereference mailing-list
- [oss-security] 20130712 CVE request: Cyrus-sasl NULL ptr. dereference mailing-list
- DSA-3368 vendor-advisory