CVE-2011-2529
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x...
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.
Exploit likelihood
What each source reports
NVD Score used
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.
- Record
CVE-2011-2529- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.
- Record
CVE-2011-2529- Updated
- 2026-11-02
EUVDEUVD-2011-2512 No score
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.
- Record
EUVD-2011-2512- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xrm7-6c5j-p27r No score
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x...
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.
- Record
GHSA-xrm7-6c5j-p27r- Weakness
- CWE-119
- Updated
- 2026-11-02
OSV No score
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.
- Record
CVE-2011-2529- Updated
- 2026-11-02
OSVDEBIAN-CVE-2011-2529 No score
chan_sip.c in the SIP channel driver in Asterisk Open Source 1.6.x before 1.6.2.18.1 and 1.8.x before 1.8.4.3 does not properly handle '\0' characters in SIP packets, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted packet.
- Record
DEBIAN-CVE-2011-2529- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
asteriskDebian:14 |
before 1:1.8.4.3-1, plus listed versions 0.1.11-30.1.11-3woody11:1.0.5-21:1.0.5-41:1.0.6-1 Show 45 moreShow less1:1.0.6-21:1.0.7-11:1.0.7.dfsg.1-11:1.0.7.dfsg.1-21:1.0.7.dfsg.1-2sarge11:1.0.7.dfsg.1-2sarge21:1.0.7.dfsg.1-2sarge31:1.0.7.dfsg.1-2sarge41:1.0.7.dfsg.1-2sarge51:1.0.7.dfsg.1-2sarge61:1.0.9.dfsg-11:1.0.9.dfsg-31:1.0.9.dfsg-41:1.0.9.dfsg-51:1.0.9.dfsg-61:1.2.0-beta1.dfsg-11:1.2.0-beta2.dfsg-11:1.2.0-beta2.dfsg-21:1.2.0-beta2.dfsg-31:1.2.0-rc1.dfsg-11:1.2.0-rc2.dfsg-11:1.2.0.dfsg-11:1.2.0.dfsg-21:1.2.0.dfsg-31:1.2.0.dfsg-41:1.2.0.dfsg-51:1.2.0.dfsg-61:1.2.1.dfsg-11:1.2.1.dfsg-21:1.2.1.dfsg-31:1.2.10.dfsg-11:1.2.10.dfsg-1bpo11:1.2.10.dfsg-21:1.2.10.dfsg-31:1.2.11.dfsg-11:1.2.12.1.dfsg-11:1.2.13~dfsg-11:1.2.13~dfsg-21:1.2.13~dfsg-2etch11:1.2.13~dfsg-2etch21:1.2.13~dfsg-2etch31:1.2.13~dfsg-2etch41:1.2.14~dfsg-11:1.2.14~dfsg-21:1.2.14~dfsg-3 |
1:1.8.4.3-1 |
asteriskDebian:6.0 From an advisory covering 3 CVEs |
before 1:1.6.2.9-2+squeeze3, plus listed versions 1:1.6.2.9-21:1.6.2.9-2+squeeze11:1.6.2.9-2+squeeze2 |
1:1.6.2.9-2+squeeze3 |
asteriskDebian:5.0 From an advisory covering 3 CVEs |
before 1:1.4.21.2~dfsg-3+lenny3, plus listed versions 1:1.4.21.2~dfsg-31:1.4.21.2~dfsg-3+lenny11:1.4.21.2~dfsg-3+lenny21:1.4.21.2~dfsg-3+lenny2.1 |
1:1.4.21.2~dfsg-3+lenny3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2011-2529 is a medium vulnerability (CVSS 5.0) in Digium Asterisk, published July 6, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.28%, the 91st percentile. Fixed in asterisk 1:1.8.4.3-1.
References
exchange.xforce.ibmcloud.com/vulnerabilities/68203
osvdb.org/73307
securityfocus.com/bid/48431
downloads.asterisk.org/pub/security/AST-2011-008.html
secunia.com/advisories/45239
Show 8 moreShow less
debian.org/security/2011/dsa-2276
lists.fedoraproject.org/pipermail/package-announce/2011-July/062628.html
securitytracker.com/id?1025706
nvd.nist.gov/vuln/detail/CVE-2011-2529
github.com/advisories/GHSA-xrm7-6c5j-p27r
security-tracker.debian.org/tracker/CVE-2011-2529
Left out here: 88 versions. The JSON record has them.