Description
The silc_asn1_encoder function in lib/silcasn1/silcasn1_encode.c in Secure Internet Live Conferencing (SILC) Toolkit before 1.1.8 allows remote attackers to overwrite a stack location and possibly execute arbitrary code via a crafted OID value, related to incorrect use of a %lu format string.
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 5.0 | silc-client | 1.1.4-1+lenny1 | DSA-1879-1 |
| Debian 5.0 | silc-toolkit | 1.1.7-2+lenny1 | DSA-1879-1 |
Advisories 1
- DSA-1879-1 silc-client silc-toolkit - arbitrary code execution Debian Security (DSA / DLA) · Mar 9, 2026
References
- 36625 third-party-advisory
- silctoolkit-silcasn1encoder-format-string(53477) vdb-entry
- [oss-security] 20090831 CVE id request: silc-toolkit mailing-list
- 36614 third-party-advisory
- [oss-security] 20090903 Re: CVE id request: silc-toolkit mailing-list
- DSA-1879 vendor-advisory
- 36192 vdb-entry
- http://silcnet.org/general/news/news_toolkit.php
- http://silcnet.org/docs/changelog/SILC%20Toolkit%201.1.8
- SUSE-SR:2009:016 vendor-advisory
- MDVSA-2009:234 vendor-advisory