CVE-2009-1957
charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to...
charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers "an incomplete state," followed by a CREATE_CHILD_SA request.
Exploit likelihood
What each source reports
NVD Score used
charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers "an incomplete state," followed by a CREATE_CHILD_SA request.
- Record
CVE-2009-1957- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE List No score
charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers "an incomplete state," followed by a CREATE_CHILD_SA request.
- Record
CVE-2009-1957- Updated
- 2026-11-02
EUVDEUVD-2009-1952 No score
charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers "an incomplete state," followed by a CREATE_CHILD_SA request.
- Record
EUVD-2009-1952- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-j58f-q3cq-42r5 No score
charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to...
charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers "an incomplete state," followed by a CREATE_CHILD_SA request.
- Record
GHSA-j58f-q3cq-42r5- Updated
- 2026-11-02
OSV No score
charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers "an incomplete state," followed by a CREATE_CHILD_SA request.
- Record
CVE-2009-1957- Updated
- 2026-11-02
OSVDEBIAN-CVE-2009-1957 No score
charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers "an incomplete state," followed by a CREATE_CHILD_SA request.
- Record
DEBIAN-CVE-2009-1957- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
strongswanDebian:12 |
before 4.2.14-1.1 | 4.2.14-1.1 |
strongswanDebian:13 |
before 4.2.14-1.1 | 4.2.14-1.1 |
strongswanDebian:14 |
before 4.2.14-1.1 | 4.2.14-1.1 |
strongswanDebian:4.0 From an advisory covering 4 CVEs |
before 2.8.0+dfsg-1+etch2, plus listed versions 2.8.0+dfsg-12.8.0+dfsg-1+etch1 |
2.8.0+dfsg-1+etch2 |
strongswanDebian:5.0 From an advisory covering 4 CVEs |
before 4.2.4-5+lenny3, plus listed versions 4.2.4-54.2.4-5+lenny14.2.4-5+lenny2 |
4.2.4-5+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-2009-1957 is a medium vulnerability (CVSS 5.0) in Strongswan, published June 6, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.95%, the 87th percentile. Fixed in strongswan 4.2.14-1.1.
References
secunia.com/advisories/35296
download.strongswan.org/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.patch
lists.strongswan.org/pipermail/users/2009-May/003457.html
debian.org/security/2009/dsa-1899
securityfocus.com/bid/35178
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lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html
nvd.nist.gov/vuln/detail/CVE-2009-1957
github.com/advisories/GHSA-j58f-q3cq-42r5
security-tracker.debian.org/tracker/CVE-2009-1957