Description
Array index error in the (1) torisa.c and (2) dahdi/tor2.c drivers in Zaptel (aka DAHDI) 1.4.11 and earlier allows local users in the dialout group to overwrite an integer value in kernel memory by writing to /dev/zap/ctl, related to missing validation of the sync field associated with the ZT_SPANCONFIG ioctl.
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 4.0 | zaptel | 1:1.2.11.dfsg-1+etch1 | DSA-1699-1 |
Advisories 1
- DSA-1699-1 zaptel - privilege escalation Debian Security (DSA / DLA) · Mar 9, 2026
References
- [oss-security] 20081203 CVE Request (zaptel) mailing-list
- http://bugs.digium.com/view.php?id=13954
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=507459
- 32947 third-party-advisory
- 32960 third-party-advisory